1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2845e28318920b5f34df9da544925676771be0781d195ef526d3296b5f5ef91. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fc0236b-d171-4d40-aa26-6fe080331d20.json and https://artists.proofprofile.net/proofs/artist/7fc0236b-d171-4d40-aa26-6fe080331d20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe330a02e10881829b7b385a1d7f635ed0c0aae8c4fb85c9976ca2e6ef74f273f. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d51504aaf9af17a9faef82802ff4a652a630cbf92e77dbe244c718c0f25935. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:12:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162fd2f8d93b5bf1b522f42ce2954bb53b7a09378c1efa9c7fabbb6d344d151c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e074bb81fb6c3163a9901cb1ff590b0cc9d22a10de6628e160786104bb7d34c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc887782026e8a50c0bc46759b307934b2323fd8571542e6f8746b3c0919515. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARFSB0800391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de05ece8059cdf4e0d24d7a3d524078f7af5aafcf0f340191b5b559048a51aa. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8639e7e9066de96031163bba05ebd4521e18ebb82ea92265a9169cab0761c0c1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72003fac488a52c85f95fff96de28dc3ed8b50645a5f3300fd54b83f4e54b74. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a6e34d120427312648269e99f3780c118a33516336a481d0e7054507dc3f77. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARFSB0800392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719b89d864db26564582ed02d91f091b42ca8dbe7e6c9f401a1fb86c1536dd09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd749a52fbf1a2f67ca1e071302c78ca487176c59ecd11b56e6527e6b87abb54. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5718ab2a364b895bf01e96f9d3cb12a05a6a69912bed3f78450bd17998c29aaf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93cb5a12ff4d76271a7a0cfeeb0d5a670ac8638fb7f470d9492b8a2c9c8f167. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c89e6d424773109fba27b851278b859b0938c109ceb2dab24106fb06297142. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaf3bd3ba36903151fc089d3a89db1e0eda866b06ce196f7951b228f3674619. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee667c4891905f0f045355bd358075de248fce1dbb2cd6e95ece6ec11513c104. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa1a023d77ccaa6aabafe8c13435a3b0547e7451b5e086a97112530908830c3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef3e81f0648e350abb6f4630e5696cb9152505eb8a5c5954449ab42f22914d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382bc80fd9246b01c82d7a56daa9a5baab5f241295cdf2c60b474057b3ca2719. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386b8759952bd9c2b790cda1f056e237e551af55894c0babba0ab23e6db33e83. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa2d486347ced6d2f2b6be50634b5f273f73ed1fbf9bafc3b195fb68717a4b3. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARFSB0800394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe280eae6a112244584f5ece0f0f426bc5192433d68364888c103295128faa930. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF107800142.
Galantes y Respetuosos, a la Preciosa Dueña de Casa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cdb9f410e21b44e7dd14568276db259a259426563a45d3cce8a1c5fb468efc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a7c888db014cdc969f594665e8ad645ed997c41c49731fd03f7878a6c5f35e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF108100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9293646f0b2d2763bf0e9ca2d4f4187126ba64dd940dbfeb22072dbf498e9c1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67b858711cd027ac8a2c983c355b2f20f8eb9e6d416134275f367b8e464931. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:15:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF108200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbce3c3f2c7161e835c84c783510a93cae1a346358f08d173cb9943833426753. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF108200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd391b2d278fe5ce6858f2f15e3343215e3a269e224d4d4e1e537bf95e0f75a5e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2d6cbc614b4775950dbfa75da5d431ddbe666a03b473384cf2c00ec8625da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b4c006653bb5cfc8267770fd9ebe30ba9a6e6d69fe302a9432c93ce00d39f0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877372065553213adcc744a22d74c35f1c5205718402362567318903208ddc82. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601010719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a45b3bac163d893041f448ee940ccf50b0287c8d3c60b65606219ae6de634b5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601010720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc659ec1f029149dc05241ae278645dfe5bb2366c0c61d26cab544f73ad9f8179. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA591001876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d937801b361172cd4aacb2fd7002ddc6be7318c22b9337ad59286ee042033b0. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA591001877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09daa7716d618da30a2f0143646e9433352f78b1b9a20ad4d8be3c9a495071d0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92595372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0f4a0df3f38f35796ec0f5a101942f794d79be265c08d3615a4569df387102. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92595373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8a1e9e9c1c2c6bcc8138010b1fcfa92047830ae6c2215c01eae5bb7be6e034. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92595371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f70c94b01a9c05c0a22d94ce83398e78874bc04229b110e38e69880a0fc132a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCHR1313108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2d6cbc614b4775950dbfa75da5d431ddbe666a03b473384cf2c00ec8625da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2d6cbc614b4775950dbfa75da5d431ddbe666a03b473384cf2c00ec8625da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF109901424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f94263221bf8a41c8e565e0e716b7fe59aac2ea3f3dd5c1152d2bf3957850ae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USV291340439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b73abce7b6d1ca4742f839a566a23ee64bad36c5150333ba7403522273c6e6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCHR1312847.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch