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 0x561e6f475b449a2eff6a32500cc6890199ef754df91b93fd2b6e8707d4d05943. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dab94a7d-f2d8-4ede-950e-f95a119539f4.json and https://artists.proofprofile.net/proofs/artist/dab94a7d-f2d8-4ede-950e-f95a119539f4.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 0x08712dad5a62b782a9dd99dae5a0802fc51d2bd7b8d5f2957d7004ce34b8c5e1. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:56Z), 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/DEDE32421301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5419323efc2d1122a12fcc5c5140798c4cba1c19caa596765a3077fa139c56. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEDE32421302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f72dfc6aa9b2d888047bca38370242a794bf73942cd227d76d79a104eb5d57. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:27:46Z), 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/DEDE32421304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d155f01670fa1799478f5d544353364958b3e48e954c1079478f26ae83bb1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEDE32421305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fb74a4a0bac5e2af1f052c5fbd91cdcdf05c94d549550d5c6bddff7edd1222. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:12:50Z), 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/DEDE32421309.