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 0x0965c30671514a5c5811505d262f5e2107f6112565b4edaddda23ea8a6c358aa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf29e693-faec-4c59-9c41-d8c7582cadba.json and https://artists.proofprofile.net/proofs/artist/bf29e693-faec-4c59-9c41-d8c7582cadba.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 0x8d6f99db4c0f9b010e63b8a2eafe65d13e5c2c30761d52569e14beecad00e6aa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADE1753900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3bd37154771c06fcadedfba27d291b85f64728c664eeb5657c8cb4c2103643. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:51:06Z), 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/QZES71874340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bec30ef2af23f18aaeff1842ce092ae2ed681796514b2c081301b205eeec78. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:00:24Z), 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/TCAHU2443326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c2e76534fb65cf227da1032cfd7cb94c7aafacc2bbdf742353d50116c589b8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:18Z), 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/TCAIL2402174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631168d5405a79e177da79581b5d59e3c5f5f22a07dc4d4f40ad09f24b990d06. 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/TCAIR2496345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bec30ef2af23f18aaeff1842ce092ae2ed681796514b2c081301b205eeec78. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAHU2443326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569f70683a30ab3370ffb5f3e1d7934546748a360dea07b662e9d9f5272614c8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ32296724.