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 0xf4d1307999cf3ff295aaf1525398bed276e173941a1a89222277ed5ced4d34b8. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2727e5b-2dcc-4bf4-8cda-4dc7ecc0c93f.json and https://artists.proofprofile.net/proofs/artist/a2727e5b-2dcc-4bf4-8cda-4dc7ecc0c93f.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 0xf7c244ed12f4df1f5ac9a5faf70de22824ca8daac26a976a7c28d5afc79b7b5e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:59:58Z), 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/QZGLS2533927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2753501608af3ab0caf46074dee361cc9aead06bcf90c5909fc67bcbd186898a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:34:06Z), 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/QZGLS2556366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db10272fe42996244ec1458c148527e150553b3e854c73feb7dcb3175b0e923. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZGLS2556373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72a81039d6c1ed8b2d183430bef1c0575c9ad90ee959e41af1618cb7454c2b5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:49Z), 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/QZMZ92538019.