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 0x73850ed563bc775485e3c1d1b2d710cff8fc0a8a3e149e309145310df3a6c987. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/625eadb6-f154-44d4-8a24-9c22310a188c.json and https://artists.proofprofile.net/proofs/artist/625eadb6-f154-44d4-8a24-9c22310a188c.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 0xcbfb1a5cdb13f75dde26b47ea9c70a8d991f920ee5dfc70efefb7e311bce5f4d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QT2VB2460863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5f2a765efc63bb5d2192104b28aaf754f084aad03a86c30b1c5142bff137bf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFK2348475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61957931f86a754317cbd6e1f03c8e6ec9632844b82a2d73ef7b40146b63d6e7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHNB2470159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f37be6c3d1d2424cd0e725c50f79ea35629d1b84fcb05c61279821c2d820ef3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTAZ2352266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb388206ecac6acb3449a7444dfdee69c1943981dc84cfcc42e9f1f4f8bbcfc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6K2421315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec41c73242021711df2ff077ea23aa95e33ca7ee155095ae61ed9e929434dbf1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:41Z), 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/QZK6J2496308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb2933a63bc60819fa2f888de373323b710d5ed86599c4ecef2fdd233601e6b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6K2418971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1021492ff86d08ce7e768495d69d2811112301e824d7478d2417400720000dd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:03Z), 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/QZK6J2493610.