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 0x88f420ef7217e8a3a2b26f07d2c9a6a33ee9971fb6715b3f4001d834b2864d9a. 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/eb92bcb6-5d30-454c-97bd-dffef3d8c0b6.json and https://artists.proofprofile.net/proofs/artist/eb92bcb6-5d30-454c-97bd-dffef3d8c0b6.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 0xf58f87a050d1a281acd452ef283aabc2c75e1196c0888c718486b252f3b671a8. 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/TCAFD2037237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1ed5585fd91e64f57ca5509427a888ba5c9c52d8352b57840de54835196c18. 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/TCAFD2037297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21235819a5199a55878a88ad72b38e01afd0c6680df9b8c6dd329e47860b760d. 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/TCAFD2041419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1e7e355b57c20c5739ca01343e1cb645b372a0eea8c94b428dd405190d53a1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:29:09Z), 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/TCAFD2041423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f97fde90d2eee851486abd755df6c51d8ab087b3a5ef9f08a2dc18cd4cba746. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:08Z), 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/TCAFD2054020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44730b512eef3bd7ed6313bf6977fcb1a6ad26bedc9cf930253bbf454e00ecc5. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAFD2067854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dbc1245803ddf6319d2e92d82e82b83a124f6675bc3e5e92077b657ea06ff6. 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/TCAFT2177064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30d0d65a69f5376144cffe442b6670fb74a95a6cb07133943341d235c6955d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIM2476583.