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 0x05e8a84bc4d21cc13df73ac0703f3aca9a6d146a55c00018be49b89507ed5873. 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/917dc7cc-b008-46fe-8486-363c805d34ec.json and https://artists.proofprofile.net/proofs/artist/917dc7cc-b008-46fe-8486-363c805d34ec.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 0x720f5f962d9237a5af448ad81b60f76759a40a212cccba60f0e4ba628ebddd7e. 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/QZ22B2001307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884fbcb28ff7c4b4c49737b827a4a74b15a1aed7bbb3eea1b0e33a7a95c04f5f. 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/QZGWW2096340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6691a6e6b76ff3236bc97524a1cef7068dd6536307135f05f8e7bbd6af53c3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZGWW2097086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e40647590f992bb46b0683c5d436b6b6600209c5522fe7f147a62d796acc3cd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZ22B2090376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c9032362e19ee69e275257cb61b8f6934fb7f48d277a2e14f03cee38d5101. 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/QZGWW1980329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089db546bfb98f045f8a428637d1a72a0ed8e1c5a6dc716250420d15cd9b3e57. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZGWX2077010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c9addfc9b87bb5c6f837bfd3f185dc712b85facf6c94d41ac02fd37b1972fa. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGWX2094851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c35f8dcb905a98aff0196bf2ed1c41c5649707d61a254fbacdffcc046b54442. 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/QZK6J2108249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80707e339aa21baddb44f6ec792aecb5bff3654b447455f4c9cfe8c5ed792e78. 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/QZK6J2108250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d75f2da1543d3b6bedc6d70b2fe6ddacc3c15aca1f3363183c162070d175e7. 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/QZK6J2108252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2852c607d10f16f63142f788829ebfe2052a8fbd770b6fe9dd682c6d099cc0d1. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZK6J2108254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2019e64991d72ed5665fd6bcc033c6ac7006e74d6d18bed91d3f05b1473af60e. 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/QZK6J2108256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50fc3b4f056a844bf7fc3e1a6999694a097821e5604333dfcc5b12acf39fa89. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6J2108257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4904be9fa7149936ccf2ca8c28e93740811c64005423cc7d5c15f068731ab5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAU2268816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df83cc6f4d60cad6e386689ea2e5fd4cb7d195bdb9959099416ddb218972960. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZES72332507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aef60d1d69e6e3c6bfed84e62d99fa0e2bf804a8859daee201007dd067734b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTAS2347933.