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 0xd72358899283a243c8dd7b81941cbc79e215f3cabafcdfcffc4efb854c90bf9f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06211741-7bac-4b9d-9d32-4fc79a18b7e0.json and https://artists.proofprofile.net/proofs/artist/06211741-7bac-4b9d-9d32-4fc79a18b7e0.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 0xc253a40a7c0f09353397df6e5f3ceca1ed0e8f6f46f37ef86bd2bfc3bbeee9d8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX872157200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083dbc0e2fe05aa4fe3263e8e16fbe3e8fafc170f45370d12f6a63b72de57c89. 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/FRX872155129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee282dcc5d6cc7e3f3ee1304f29e2a3e6d0b70e37cace6cbbfabd09966cde93. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:04Z), 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/FR10S2235984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eb6ee903b5976b6f6b1e15e5bb08e078b71ab48e1c72f39034ccb572b31af6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR10S2218801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6eb5da0b4d5bc7d7009c8695dc4c4bdc6aeb1fdd7cbf0977d070a87ae222c6. 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/FR10S2235988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62202578fb1d050c12f0048b5e9489d65b544249d1dc82d71e3644e50da9569. 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/FRX872157040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2c308539b96211428996ce97c128bbcd3de92305d64ec725208e1aaf4a6d6e. 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/DGA072274694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85f4818335da18392e28f534d76eaee312b2d6f79cbc3723fa0fd1ff55f9912. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/DGA082326401.