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 0xa2e39bf9f76808267dbdcd6260c6f70c1225ab0bf7c270dab6f5c77ca25d8864. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/274f2566-4dc7-4c8d-a7be-a0f918aa7fa8.json and https://artists.proofprofile.net/proofs/artist/274f2566-4dc7-4c8d-a7be-a0f918aa7fa8.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 0xd1382242523d251c2e222fecb57f1ac6aab724dc331dd1918fef2fd6734e8b54. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:59Z), 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/QZHZ32251835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a0693aa49ed74f54e0ecd28e0bc0bf51d1421d26d1e9f4437ab794403c64ee. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHZ32251836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fec547f580f56424abd5bba86ed5539d60b9edb33b451df18a1d7d7b751cce. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZHZ32251837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17db0be10b80a8c3d570b73f13a5dc1424153c1a537169f8b69a5cf5d0e5226d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHZ32251840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16809e2fdf36467bad8344e0460dbe578d1da0278563cfb740c564b0783837e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHZ32251844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7274ac55b947d5a087f540c7e914470568e5d4902d097d211d2af87640677906. 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/QZHZ32251845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a96de91c94f46efbc30abb0a15562a2eddadcfadc3fe7db8d11c7b28f735a38. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:27:05Z), 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/QZHZ32251846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c34dbcd5f3d6deef39f473c3d6d1f50b7ffce665aa35004312278e8605f33b6. 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/QZHZ32251847.