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 0xc0bc9c4c4f738ffb81f3b524369690e0684c5a1c8c092126bfda20d37f758785. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a72ba110-97e6-4dab-a865-9088c4c998d3.json and https://artists.proofprofile.net/proofs/artist/a72ba110-97e6-4dab-a865-9088c4c998d3.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 0x866b226458d87161375b25c5fa682fee2d06f5884ce32efbd8275914fd393e75. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:00Z), 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/GX3Q92349366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1834cae4f4d2a964703da6ca084614d97f6d2e49b5bb509714c4c4faf21b736. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:38:29Z), 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/UKXN22304179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bd1173039f624f156e52f65883bc390e8757e0ff80eed7b50dd226b3e88c04. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKXN22304180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1086f37d3619ab97141f0e6efe26ffe5ecf6c8c83931f5b51902c07af486097a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22304187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fd35b835a24ef4ebfe11cc983b5ce205fbec0d477177f172cdb58d8515bcdd. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:47Z), 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/UKXN22304193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a36b205107697e1beb88f99e64b3f9e63d8d90d1d4dfe99de3cc9346550bc4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKXN22304197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f24c47593f51305219b240d6e8ee4d0f635847d1285a73a508db7b8a1a0af3. 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/UKXN22304199.