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 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 0x56d76cbbde1c6ecbbfbef49498e2ca111822cf3fece590959cfdd2c9f0654493. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7b2d76e-b0dd-4205-905f-c658132c9eeb.json and https://artists.proofprofile.net/proofs/artist/e7b2d76e-b0dd-4205-905f-c658132c9eeb.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 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 0x87625b1b727f5d74cf1928c7c95e350574bb54fe7c01d9311b5c3caefe19fcb5. 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/QZWFR2309435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd17cb0709aaf95348822463418143c7ec6ace1aa3c881b938090d349423ff. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6K2418860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fe6717102b1acf3db33ebf80bc64c34f1b1ba1d6209f56c43b4fee3d25ac11. 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/QZK6K2418862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d551713ece298ff7320b20a806f51997084689cd1351648cdf27721a5437ef. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZK6K2418864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd1fbbc1abe755e10817c6f658f5d27dfa90246859e58a58c309b99b8acece. 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/QZNWV2194245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c319cfd1d3a45de034e9bf6d691fac40ebce3cd4eb7ae0bd117bfc74ece6e7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6K2418867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a8ae7bcd8ed2e91e67a99b956f1f67550f3f0aefe765d70b4d7ca8471c76a2. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZK6J2454240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a60165837b83b0d0fd7a85a84f5eb5091c36e1c17fe5f2723158528c47d3d3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6J2454244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a58ed1548509eb66b1f43f718ea171b70a72a5eeaded4a576ac8b6683166b3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWY2484637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930a972049b7969013b590f091a7c9e0e9ebdf3670910f9e70f17e113f869366. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB52412903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2f868b872ecb45f3cd62e8c4da1bce25d089f3f427718a20f6f66158365009. 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/QZTB52412904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0fc8a1b5a356d52cc69cabd365e46684e4c3a2119527488c13a31302c9da59. 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/QZTB52412905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42d6b9353009c86cd8d363c45f7fe2d8639e51899ba98ae68c9e77a63ddb3eb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTB52412906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f651af125cedadab17efe8b4ac685e0ab44ccbb964566712529ea57474efbb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZTB52412907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bcc00ce2c11eebfcef3de9fa741b71155da92ea593d5a022fee0a945473db6. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZTB52412908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81f7be7b80ef925dc22b3682672971dec653437749b02aab0cd4bcadfb07ee3. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTB52412909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccdc07258e6a44afd82c5d4e86d71172a58c0ef5d575155d49e5571d94e2b12. 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/QZTB52412910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e89c5ded67ef4f4b00766332797f6b1389cdbf575a234b881e89b9df7458667. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB52412911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8676c08e8457e0068fb76c553713772ce4c417a13b62cbbc5f1e9bb09c3668d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/QZTB52412912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4deece7ea612ab77d1c99f5bcfdcfb674a0742e44a26487189477d2a4d16301. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTB52412913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390ae6c572c70443905877b3e521e06aecf6cc916cf554ad82b7d2a5c935f470. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZTB52412914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d445264ca69efd915f5ba6a1b0e5337520cc951ac371e05f35635e3d0d7f7e2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTBB2404815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe449bc549a604e06e2dabc87c0bd7c0a971c28590f0619bed3657f4f3498d8d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBB2404816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc378943026407b109b7a6e8b87d05d7ffde65a216a84b9d874454abc8e299730. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZTBB2404817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275368ebb11dade7851edf2747b84b221128cac2e7be7a6365024f407210ffa5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZTBB2404819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360a1366fec90930a550c92ed7e3373e3ae296f945e8a8eac44599783d133538. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBB2404820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87303b262a5ad952bfb7b5476d32a5faeb47bb1a47f530aa6bf610cba56c053a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTBB2404821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b11bc76d4c6029111a18b3a7b89bbdc59ce6416c4aa1a8d14d22bd8eeb643af. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWS2563518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b58d7a900c8f85efdb52e01d4907b10c7c931a87efda735938102b1619c17. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZNWU2590190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc50eb6172fe4a8ac35d88f69295270268b108f2face81deb719bdbb923832. 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/QZNWU2590192.