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 0x3515909d0b65c0fd610e44f789628702d3191aaafd06837f4a5bba24f06dc51c. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b933c9cd-0460-4146-adef-300ac8c47c7e.json and https://artists.proofprofile.net/proofs/artist/b933c9cd-0460-4146-adef-300ac8c47c7e.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 0x7b972f8c15725e6a86e20404683cc07fdfbc4b5166ce2884d3cbf216b9705e3a. 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/USWB11000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cb732c8a31b7f4d121960cd9a99a55243af86c4f8e4578326f90a6fe5fcd8c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USWB11000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19516a65588cc45967ce9ae67251a3d4b539469a94512b4d5983aa29b4c1b414. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USWB11000521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060fd9d64bbc87894c702def0f80cd8927e20ddb1d503d1f208d05ca79f46a31. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USWB11000510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bb0e65a455832f4f56d1957d0e5e01dc0d08b090324ce06613897ce36660a3. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USWB11000514.
The Best Of Larry Graham and Graham Central Station... Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2391f688c675734979ad8b0dbb1f4d042b9c8a417acb47281b68524ac7a2f712. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USWB11000439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf411fd2ffeab8bfaa75b41aa2abb02aa3f0db5f218f1ff09f10ca43bde64de7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USWB11000498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cec2f4f4a5fabb8fc3a82e0b5263bddda15b0411771abb25afca06646bd0419. 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/USWB11000495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47d96c7f9ddf6082acae7d4e3433c93e54e4cd98f08c372f297eba9403af9e3. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USWB11000171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa051d64ef2dfead593873ef87c52585aa372c5d1593ab848ad0a4333058346a6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USWB11000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cb732c8a31b7f4d121960cd9a99a55243af86c4f8e4578326f90a6fe5fcd8c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USWB11000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a594fac91258f1a82d1c160bd299260e958362ceef56b3dbf1d42cb514d2fe. 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/USWB11000524.