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 0x1649f9e0d763a119af46fcd5c392ff75d3211c8e9ed7ccaacb576a3b756fdc7b. 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/66d5fc4d-d6f8-4219-8aec-c4ae0ab0867e.json and https://artists.proofprofile.net/proofs/artist/66d5fc4d-d6f8-4219-8aec-c4ae0ab0867e.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 0x874b60ea9ab2f5a633a68c5608740c261c3cf33b0ecf65a8ab1365c25a2e035e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/SE5752269969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433564e691c81d837aab73211b3bc21d18ba03c90ebe6f1c4474c881a2a69052. 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/SE6SA2224680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b83d73440da782846dfaab7377e248e3582d64c97911284e0203064b31aa707. 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/SE6SA2256617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b218ebd16a9c6097fc81d9674302a4ca577c7f2886f813840ac10c27299a895. 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/SE6XY2203424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7da140a1158021c320a0b70cf3824c1a460e62a53ef674e9e4359b58060c77f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/SE6XY2262588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc50ef03b480ddb2ee9903f526a4acdb82f593eeaf6e8e0944e02042a8b4658. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE66N2256301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf89a19e9788298f9484b96b437a540d8f77cddedb186cccd37d72a39b5b19c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SE5752336882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed648dc68a4ce5233d4662a67f759cf2212485623f5df065fddacfdefbac86. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SE6A92357732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e8b56a4616be06a3c5f7559ef87b3dd0192dfbc6d7f9756a71adf95fb5748e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SE6I32473258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c046dff6387c0f1ea3c82fe11acc691c2e3d54ef2043ee4e7829c5caf6458f. 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/SE6XW2401821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f99b1006a8951f9736096e120af089a2492f67a9dff8bee48a32a8ff774b1b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE5BU2510619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fdc704bb35b74a3860d2a02a94a7fc72ee8ca4fc927031ecd2f2ca0ec5cd95. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XX2569434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6214f66a14ad48a080f7876daf217252920bbe2dd98746aad7623a29c8a50bc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XX2569435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e733e7506afedf14d67b447dc0fdedb7363173409d5d701584c750fe14a97. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6XW2528754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dc3d1821f035065a27a364249b129d02fe181e76e8e5b8762b237b07022f54. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/SE6XW2528755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39e8ce363440a5aa30e63cc5cc37576d6be49e2f1efbeb883182465384bb38. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE6I32542292.