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 0x074f72600c27ebb1b3bee9bded5f5daf4827455709ab6653cc54ef8dd6f6a13b. 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/919171cf-ab27-4ccf-af7a-45aec0b0a730.json and https://artists.proofprofile.net/proofs/artist/919171cf-ab27-4ccf-af7a-45aec0b0a730.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 0x0ab5d87275305bbea8d01cd2a9960d4b1203614ec3c0e65b7a23673cc3807930. 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/DEBL61252309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492dfe8880bbf1cd1b2b463d89503753df4b5184aaaaa9b6c81529ba597f0400. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:00Z), 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/DEBL61252312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d0d3fddbf48538e5122703bf07992f0b82d1cb119b6d4e070c92a48b9b7d26. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBKQU1864806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed820b67c815ef7fc5c131424c2fdda22eb4b94e16ef53619267bdc38a878c9f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCVO92200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65efb42d22ab10ffacdf8bdf2f961bc9e4af61f027b54bc0d53d151a709fd13. 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/BCVO92200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbea3288366b99a9489ba0ac37fad4449b4a76ee90221a4ffa1314f8b113b03. 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/BCTI82300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa5227c592b7388d5698fb44d337fcdde3a3cdccfe4e857f2c8eb1119fcebf0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:17Z), 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/DEKC42400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0130f682b1cd24819344091ab088105bb72720fec1625e5e41b218a60ad3c9. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/DEKC42400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d4176a35fd36eca4c85b78dbf0ba8e908698ae2e4a261fdcdb69892f1852c. 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/DEKC41400086.
Sol Brilhante - 4i20 & Capital Monkey Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c13fe08c0bffd59878d75db36a027a7b3e45c048a16253e51d261faa66aa36. 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/GBKQU1927961.
Mental Note - Major7 & Capital Monkey Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18a0de7a6b7893bd3f5dbf8eff6069084c341aee0a1200ba4d95d984e96ec21. 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/DKZVA1260092.