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 0x8368f8052a87f329792f6db88850b227e3b5df9f03c2b971b9e28ef2b714744b. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97ebb4c3-dc48-48eb-bd77-a3faff636a20.json and https://artists.proofprofile.net/proofs/artist/97ebb4c3-dc48-48eb-bd77-a3faff636a20.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 0xac197b6bb221f778e9c39732ce41276f651790581e7607ace3c863535c0e7d7d. 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/QZTVM2149861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dccd079faf8ad568646e487689fce87959086cd22a64b25c51c8e409f512805. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE6XY2374467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd99b5cf0cc4b9c530d4cf68a4644ebe6961311bd0ece121455ce08fdd976ff. 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/SE5BU2459061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa60583cb3641a983a35b3258052f7cb381794edcbf590236f9c94925a27aa0. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SE6I32446217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bebfc7f4944cc917cd050df8c9e24e178a45b388c8de0717f9feb8d66700f04. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE6I32457201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5748dc4d4f347b0b2d16a73e2e592e66ee7921fb8f78d4b6df9034d2963ebdaf. 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/SE6QE2496666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc261c8e92c7a642b965b13dcd0b55e54f8ee6a7514541c50ac269561c5a975ea. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:22:51Z), 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/SE6QE2496667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1bf28e304c35e611c4470dffdbd69cc9e3a85f734ba7440f06ee17347d7b83. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:28Z), 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/SE6QE2496668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e752c16c0423dcacfef192cf4d7ee0304e70f8629b4f8cfdaf5715c262e01d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6QE2496670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310f5d68e97be54096464e0c0066ad6ecc7c7ecad3f4b42a7dfbc30c90d419b8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6QE2496671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1516cbc6d1f1853b0a2647714f564ad7bd4cb9adfa1d2658d4093494ea0be. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6XX2564730.