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 0x9777c12ab5f8afd226043405d6f72fb85e8e202beea03e2474989e9db73b736f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c76765d7-b9e3-4d7d-b66b-1e41d243e545.json and https://artists.proofprofile.net/proofs/artist/c76765d7-b9e3-4d7d-b66b-1e41d243e545.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 0x84741f90f88a0362c478cbe72ba1668353a526dc83262ab0db92aa8590a5dd13. 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/US3DF2258512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f3bc4b2f12366ab4c184b63d7918b6173745d8a154be97b118e6695d969d5d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:00:07Z), 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/QMBZ92249751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c02c23b5899745483151fd857eb35c58637b10505055af314d0e8976711b079. 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/QMBZ92249752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96d81341b8328f9a28bd26edf64a04f54af3ce59f05e6d3a82c36fd615ef24c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMBZ92249753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf761f3522e403fd820da0535dfa51ead5a5f6c471a87a9031383e3b14bb54d3d. 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/QMBZ92249754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f104cb9a595bdd05b07d995e5e5c52e830ecb1f038181850343639dc66aa965. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:14Z), 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/QMBZ92264203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ebbc038e08ecd8811aa1e7313b1e9fecfc7ff567851e6d44d540b4b8e02fa5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USANG2203359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a970f82a47de6d3dee6abcaab453a73590a8b3b69572a6d3652a40b56508ea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2208261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4033d8453a4ecaa4752cad6939c35470f0976138119f2a022bf4a45f0288f3f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USANG2219830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9943cf1581b26846ed8f054ac90ab7ebad42eb0bdc87e2b214bc98afa9149cb. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:32Z), 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/USANG2246738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c63a3d8f1ea9d429fa9dee2c836c2bc04b9d3781f53adee18678b1ac8270e9b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QMANG2215893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e6ce59435f85ba40f332f1987ff46de8ee5ebc5d002d1dcf853d4ada9b434a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QMANG2215895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d59934c14b1fcb68ad7527e322cb5560cbb0101650184a7b11c9de4eeaef8dc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:23:25Z), 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/QM3DF2421498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a4c14fad75e3e17e82cbd06f33f4d8db92045ced5bc1312de4102fc387880b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USANG2487401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558fe27a32a9e70d89f540f14f880448ea4a8bef8934111ccd04d0bc5e1c25b0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:11Z), 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/US3DF2426248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730a63dbaba6a6c2646960f3e6e133d3672f6b58f0124b0a659b2c7ed29f5a4d. 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/QM3DF2473747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d935bf122ea75f550c7ea9502a23bff640aadbabd986a72c22424845bd02e5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US3DF2432565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9177b8edad2156f1650f7a102d94b46fd2989cb7457e377dc307b45940a2ae7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US3DF2432568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a2f925f6aa8cd32afc8261a88b0dd9dfd6fd8243051b013c185d3eda7b979d. 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/USANG2415292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaab3c74031ad37f695b1b91f6fe79dcf43c6727c168bad4c934c50852dfd617. 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/USANG2415293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba1b601893385dbc360301e5583ff4554d189df2291206161d6f3d8a5a6a16d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2415294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e187b40e3b61f0ee6d81c61cc0c8f0ab8df36e3d776b9012b8b888d8e049106. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2415295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e3cdf63ed4e7363a3324021f8dab8be9455b160eecb63348ec104bfd8dee3. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QM3DF2402306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519b89562284f35fa802b5259a7179bdaa81c7619508d5837071b318b8b58f58. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM3DF2421500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aabc62bd2b6ede7e3ea5dccb7469f8fbc52778481dc159b74cdba54294cabf. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US3DF2506844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3546d74761da9b772117bda57f3fd027bb4cbd8c36c45a07c2895dfe06917687. 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/US3DF2469833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd6e704e1a6a859979613b8139e01fe0c0b74ab2e4d85abc3d159538b03c017. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2420785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997f89b9da7b76b3669caed386c2dfc84df8287bae8d6480d29b2fc48a0d0eed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCD4N2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1fc0d40f7b4691249adeea082252084143ed4c7beb9a1c21da7c3ad8c1eb13. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCD4N2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa042d5b1823240e12899138feec25528049bcdf7fadda2ce31a6408d7a92a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCD4N2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e873c59d71241c375e036dd5c75a1953abcb44b8386b2f3b255457b5f123ce2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCD4N2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5d75b0fc0313b938897db01d5e31e7830dc2016052f7c8a96b1c47f5bee2e9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2220398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9189a7bb614c4ba2c0485d931fb60b562e7b991211997a46f49e26e1ab6c6d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZGC2203842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e282f1bdddb346075f89494829f8165c80986bff8851c6b7eaa8f4ee07d6b2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QM3DF2280071.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17725471289c5568b0ea6ec46eb9de8cc073d51caafa9aed9976ad3c2f1e87d8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM3DF2276312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bfdc822d3167280b7aef98b876c8f492d0de83a8d0423d798a2ce712b8b9b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BCD4N2300088.