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 0x49608bc203ac1e156a2881f425ef14a451bd9a847732897278ace95bf29f0c24. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69c8b737-d18d-46b9-8be2-4009bddf2ca3.json and https://artists.proofprofile.net/proofs/artist/69c8b737-d18d-46b9-8be2-4009bddf2ca3.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 0xf01f4a51dc2dbbd71683c3be26982e4eb67dc5708f895ff59c4c20b4e8c9a69c. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/NLN5S2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d5ca569c92fe2793d3ab2c362f7538ab315f38c771bb0a9d90b383e0c697c. 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/NLN5S2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b17b1b3fcc8435924e94b2f0be837422d48c256ef2f72916041746a6ed1dfcf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLN5S2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72370ab79b09d8c0b26f9cb5d5624fb77c97ec35df1cb21ccf79a1af9fdbf7ba. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLN5S2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60eeb76a7b77048f204934e8d31e81ab8e5f0652e00718224c0d2ee7b38ab27. 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/NLN5S2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f2e069b812e379dd3003e5caa3e6c2fd448fbaa4425e6ec36334e0c07eac5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLN5S2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65e7c5c21270b7d2c19a90e9d8a0eeb6c2029d18f8c8b5badaf69f3f7d30bab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLN5S2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d28fbeecbf6b2acd278f78161f7f0141c9ffc2e37c1dd5fdaa6856b2ab72d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLN5S1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d05338b8a6ae44ce8163f5f0bf5747bdc7484eb2f5735b7e550cdeff2ab477. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLN5S1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f0eea91f8c5914ab765988c816968cdc4e9e17d9863890fababab26bb2969d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLN5S2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb80daaf8549a1f0f7ab7cee194b891723dd80fee5d55176e5f5b46508baa091. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/NLN5S2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb80daaf8549a1f0f7ab7cee194b891723dd80fee5d55176e5f5b46508baa091. 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/NLN5S2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b17b1b3fcc8435924e94b2f0be837422d48c256ef2f72916041746a6ed1dfcf. 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/NLN5S2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d5ca569c92fe2793d3ab2c362f7538ab315f38c771bb0a9d90b383e0c697c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLN5S2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe939e3fff0ffe86581a36b305dae166c1b9511e5eeb5a71b6a5f95788ee7ff79. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLYG92100002.