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 0xf356fc77fd93a4cf7b1d939280818afcdf9e1646d111019246830579fa296460. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9e690e8-e540-40ae-9245-f0df0e43ec7e.json and https://artists.proofprofile.net/proofs/artist/a9e690e8-e540-40ae-9245-f0df0e43ec7e.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 0xedb79daf99196b647ccb327774b42faea4c72c97675f8487ff01c8244262f291. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWV270400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c6f230e5e5853ac829595db27fd0c76ac879d87040a8ec083548cc2618aa3. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:44:44Z), 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/TWV270400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0857c4d9146e099fe34d2d1e5906d2cf88178fe2449ab35212b559ad55dec3d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TWV270400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1fa799be074120744d4563a2cd359c411f9131eb2cde5083b821af4d6ade2d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TWV270400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954b72f7aae0f48561550c1ef64b6a76f5b4191e3aa2ce9fa15d3f16b2bfd072. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TWV270500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7086edfdc332224e7ea71fbca7c3ce1a905bb1ea2cabe52c502c7eabf2e5df2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TWV270500402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e4dff659e70d5bfc5135aa7fac33c350738bcccad003d7ffbe6636c4b63079. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/TWJ310600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5465f79948124cee7ec86f768d4f3ff6c646d7204cc37d0e78e840b071ec1a7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TWV270500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15c35a05f79b2a507c841c3d2d7320b3b7ae43fc35fdea1aad282fba8b318bf. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:06:10Z), 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/TWV270500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aee50af006a12a8865e1c6f85be7eebb2d3a19e3559ddb1ffcb25883ec51cc. 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/QMDA71363970.