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 0x246b97ef64b656d4d05a21de680b5fe8ae7ab3516db885f50719f29fc0d7ddd3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a04badde-ea04-4531-ae72-ddf43bbe46dd.json and https://artists.proofprofile.net/proofs/artist/a04badde-ea04-4531-ae72-ddf43bbe46dd.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 0x8f4b0322050a1abf7d26cad4718f53b15dd9184aed5781aa1a40256842c82ebc. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZWFH2486499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02160d33451fd509bdb51c098c23c174a8d053adbcec85a7916a1a616be8a8fc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFH2486500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d1d45b8bbb49286f5c9c46354b00a71bcb9e2103d81149b0cebc6de25429b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:46:18Z), 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/QZWFH2486501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2556917ec6d62f01e6e83957768a2889f0ccab698d61eb519b71ce8dba271a. 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/QZWFH2486502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e8d182e6f6d11c3d562a464f1ccbd67c26978c8aa87af14cbaf9ed240883a1. 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/QZWFH2486503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de89172d54ae5a8a26a99dded3f2840cd6381a078f2c4fbf771a429ba32aeb9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFH2486504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb801629efdaa0c520caa17136cf38b9c60ec14a08bc70eb51440d8f78f57adb7. 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/QZWFH2486505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb4eaafeafae15a1d81b58a8ab00cc9e51f6e7b5a5e1cd09196080d53eafc6e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFH2486506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d986d13704cbbfd0a8b8c5e2cc199fa3872d8e70bd18bf7a835e35b9a767d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFH2486507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464d5ed820b969fcc621361b437be8678213ca24182e7edc869a56881d5fa80d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFH2486508.