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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099c1409cce2891c3ce198b2f8b1bf1e94157ef380a84183e0fad86a0d8f61ff. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/330f2209-279c-4523-b833-dd4fe0fd59e0.json and https://artists.proofprofile.net/proofs/artist/330f2209-279c-4523-b833-dd4fe0fd59e0.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f62c7943a4e7297c81636289e16e2254e3b38567a78b6cd3d6f52ef72cbe67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX202374739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadab6b9bda97e3e98d06d3acba514fbcc7366105453c1b8e4c6471967378487b. 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/FRX282494935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bdcd43b2351ab2e04a70b9dee892997ccd4ea814580ae2f626bb1afb9ad442. 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/DGA0M2442218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185c9b9810e2d1e29797995123c16fc1aca2d19d0320e6f2d3d1cdf80d9f149. 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/DGA0H2407592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b0334f2cd6683d96ca2bda5f9e7089713662aee2e1d2cb06a54be834a48c0. 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/DGA0S2402142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3219162122f278218814354c5b2742c941bfd8e50221b2199d83b66021bfcef3. 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/RUAGW2500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027130d5fe2d6cad9c42f213e9ecec0d30cb05472a9d99ea69cb633e681e2fd7. 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/RUAGW2500458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71968263705068927b352fc859c578bea7464cced2f2848712ac3cc39108e6b7. 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/RUAGW2500579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820cddee07d9f2114b47b75f24327b950fa539b06bcf51fc35916f1ada23d054. 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/RUAGW2501255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceabfac17c726ea794052cc9dbf00b21663bdc573ae5603ed05d7b29db04d288. 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/RUAGW2501256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d68d8ce6eedb52554bc4f888bfd192b12f3a28fd50ebf50bf84f043388fe0f6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/RUAGW2501257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dbb4ec158422e63096959ad8aed1d3adf48e8448cafd954a1116154c1c4fb4. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/RUAGW2501459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274e9460f783f8ab82e367ce25c1780b79741c9110d17e92cf47bad0a2b1a8c4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/RUAGW2501460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce166756d6ebfb964ade49c60f17a5e873a5eea09dd72aded2d480f477e3c1d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/RUAGW2501461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16801e857001717b746390f45598881149665e10221bf5bae9adada0f3c8aeb0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUAGW2505345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c64225c5dc8c5b694b70ad77d7d60b311fa2d553ca03d42096379c621ddee21. 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/RUAGW2506061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eeca9dba766f9aa7928f429e6c109f291ed929709e40edc642c41824a88005. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/RUAGW2506062.