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 0xd69cb0749bfc156bf06d00df194984e92b35c8d43b793a0e754bc9e3c65c286f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4094fca-3edb-49e5-8411-47f2eab05432.json and https://artists.proofprofile.net/proofs/artist/a4094fca-3edb-49e5-8411-47f2eab05432.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 0x81037c00fafb239513e33267dc8aa7604d7fa50780fc0402d7edbe03743a3d6c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWDW2358286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e232cc1b54b70439041c7c644e0b760d7169540bbc3d3f78a66af2eea4a5355. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:39Z), 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/QZWDW2368013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca279ddf671f2f6699eb3d7eac1f71999240d2c28a10fce39e3bd959351fca9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:52Z), 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/QZWDW2373416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4a69ad682e39249442594163060384c21d067c874c9ada64e5b59b317d44fc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWDW2384283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3f78554d1562705e54ef3d970571e9dc8cf6e7dab9bd3e6dd86a60e279f77f. 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/QZWDW2384208.
PILTER KIDS ( Remix ) Likawa x Ando Dizello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1031fdc3d578fc2ac8ca13c2cacf88ffa5daae24bb7888ef53cba992ff856f6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:25Z), 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/QZWDW2395070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b281bb9c5f35ff86a0966d974473f9fd0e3c88da58668795dd9ca7be022fb9e. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZYFZ2306970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa641fb4a95c10e66182fd27dd41d6efcdd63cd1a77daa15f9feab0be518be003. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYFZ2320493.