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 0x4129d99d8a594a4417117cabf50dfc215eb59520fd82de0762f6abccf4fd8bd0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6f8a3f-34c6-4f2f-907e-c1ce2a4bef3a.json and https://artists.proofprofile.net/proofs/artist/8f6f8a3f-34c6-4f2f-907e-c1ce2a4bef3a.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 0xc7f419b210bc3a1afff4abc7aaba2e74e14c631cb4a450fbc02dec69014a253e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:55:13Z), 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/SE5752162777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b6febb4c149d325e838c2db1ad62aadd428a6bcbe6f7207d63f35b52f21fba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5752162774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6fa33295eaaaf168008ad226b9d57eac5b49cc2a9f7e015dfd5d41f64e661e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:37:46Z), 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/SE5752162775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb69513ae393a8d10b1ea863c32b775f6ddbe0e5d35765f65965aef2e618abff. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6I32138155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22238a7beabd90ade0f6af690f021e67efa9ee92b43ddfd4eb3a873befd5c2. 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/SE6I32138157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d69b2a4e398deae860eb838e2c2557a29a493976b627124c9247544a01060d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE6I32138159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5003d43b025db325ec969dc0e931a6e37332bb51ac515fa0100a184b15390ad1. 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/SE6HN2439729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052cca8b72d04923a28f364edfcd6883056f6536be81f2de54015e22d066fde4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6HN2441769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62970b6cae1c482a6d118ed26f97a74cfd063296fa73e9a8cce0af6a0308d9ec. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/SE5BU2510913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cb454c2628172fef0a05532a4be78d5dae658b2fd1ca880fda789a441d8481. 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/QZNWQ2426899.