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 0x8f249453c8352e0ba267d8d1f204ce3effb5097dd93d85265d4a7741af84e777. 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/feeeca0c-ddf7-4ec9-8cf5-c8a1d073d903.json and https://artists.proofprofile.net/proofs/artist/feeeca0c-ddf7-4ec9-8cf5-c8a1d073d903.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 0xc5679c65210215c77a387b36c8cc9748a63e2677aac4155c7e31cda6f10f5dad. 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/QZEQU2079559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a652919892659a4f6270b4400a3924975e9cbe1f302a2b07205f7af87ae0fa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZEQU2079560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2771a73fa155739934a0288c94ff3eac88e8a575ce231737f7718977a70388a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZEQU2079561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53231f38cb84319654edda1c5f87fe217a8049018a231d2119d8e8b231c8fcab. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZEQU2079562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3032c676c90dae9efc190078a1ed5180b80e3181f5c17583365f284609049. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZEQU2079563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff39beee2c7392c96f2e79918aa9bc52bb9de88b1e009be6f822ac631f3181f. 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/QZEQU2079564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5fa93060dbafbb3645d77a2af13214bfd8217bc9ead53b3cedce45a245efe7. 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/QZEQU2079565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813e26af12495ed5c92f9cba03cfcf8bf867033d4988899cc6a44e0e1aaefb5a. 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/QZEQU2079566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f21a197f0d7d792dbf872285299b84893fffb08c6400d0e772781a024731ba. 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/QZEQU2079567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79829308dc0fbdcbe692660d7096ac425a08b3ab0e49df597df47f65613bf0f9. 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/QZEQU2079568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e66734c6e4b534ec84ea94555caecbc391b743990e2880ab7e64090a031fc72. 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/QZEQU2079569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379fa9c0cb4a1c2f854bed0043e5633d20043c4e0c478860f316bdf099d3e5e3. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZEQU2079570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4e5c0f85f4ad7d9997fb87c1206725dec57bd1b93c0fce22417aa21e6b01df. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZEQU2079586.
Siri Catado / Desce Panhando / Sou Caboclo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e206d9e9336812df5c081e1ef7d8de15969837b93242d6b4bb882864c409b3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZEQU2079595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb06730a972d92c649a7cf496b44c075c8c9ed68dc19ff55c8e2a6f2ef7ca6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZEQU2079596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8fae6f3aff07e623f379528348e683af8fab791a30ed1a8d76e12f14c84228. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZEQU2079601.