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 0x1b19400468d1001de909fc8bd4c7adf0498b08ce02dccd8779e901c7fc35d68c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf336bc9-0150-4339-8bcc-9e63d9c614c0.json and https://artists.proofprofile.net/proofs/artist/cf336bc9-0150-4339-8bcc-9e63d9c614c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Küçüksu’da Gördüm seni / Tanburi Mustafa Çavuş (Ottoman)
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 0x97181a195c33e86ce7c23097b491b7854123bfcec15fac568e4e9f882cda68b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA71379912.
Selfo (Improvisation à la Clarinette) [Albanie et Grèce]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d2a156540bfab35aa555c5a9d808438c4be4fb1509ee86389ef3b556bad2b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA71379919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc02b2a24862a52ac5828f6dc57be620ea37c7416edff2c191b42d18c13dbb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA71379904.
Zapjevata sojka ptika (Ramizem) [Bosnie et Turquie]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e54b80653ede26386109fe8748a367ec8d7282d3dbda96680129d06da1d1ee. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMDA71379916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98746b6173ee7948f297be6b150c36fccf5cedc9a445b6f441c5060095a7a74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA71379921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac45b5f93f1fc954856af637ec880fbdb1c4951b661d0c23c01f1b337476011. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:22:46Z), 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/QMDA71379942.