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 0xc8b0efb7f34f5675c0b88e76e9b686d2b9f383030b7100ff501a7ea3d5b36ead. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1f7b40b-675b-467c-b10a-d382efde447a.json and https://artists.proofprofile.net/proofs/artist/d1f7b40b-675b-467c-b10a-d382efde447a.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 0x2e895ed59e9335bfd099e71088ddd49eefcb781e54a658c97a5d79e4eebf7309. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHZ41971961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cea33603996178920a4f93ade1073e6dff37013d5dc0d0e15470c35f745356. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:37:45Z), 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/QZGLM2123432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef12655793a0603b8d353f9d14ca8b93b51818dff4c68d052c6db1b6ae1c75b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BK1H22400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30a94a87672e144aa3d84a87465eb2b9c2fe352a7bdf9a0d96da9844dd2caa6. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/BK1H22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8cd082e1eef8c3674e5363aebdf7fb4d47bbeb5a89433b932121fa4a71e8f8. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:22Z), 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/BK1H22400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef12655793a0603b8d353f9d14ca8b93b51818dff4c68d052c6db1b6ae1c75b. 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/BK1H22400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f5d2ee798e6530407fbd7198c28be3b6cf2a207c5257bfd79eb16b058fa7a2. 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/BK1H22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90e869f34e5df9e527c02ef1442437dd1e2f334b489ca2b85e79eda6daf6968. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BK1H22500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeada97fcda28dda9eb820293b2c411b9b8fa734a46e65cbfcf5af34d998aceeb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BK1H22400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721718807d8873250186d8c7c54a73f2bad1e0a829ff6a0e325c5430067fbf4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BKF7P2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af46ad517bfc42a83f6bc58834ff9fb450877f43482bb618b1dcf39aacb660e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK1H22400001.