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 0x1db3b47a09396c624b08197969333c1d0ea1d61a0230432dbc283be1dd86ddc8. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/596dc45e-08c3-445b-91ef-192f820a92dd.json and https://artists.proofprofile.net/proofs/artist/596dc45e-08c3-445b-91ef-192f820a92dd.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 0xc539be442ae40f3d73721fb4a3bab77990c7252e51740cf04c3726135cafb116. 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/CA5KR2352768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380ca1c0c3f77352680f0512a9f88fe09c33833761500481c1dd88e7f54d5ed3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6A92131120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d452bec44c353d641e93200c35e9ed895b36e6b04cdca8cc4dd1e7ca54c77bc. 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/SE6SA2057008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c8cb74d5fa0577f2c22d06616bc63afe122949ae55096e96a662eb29bb3c6c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US83Z2431535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d31cece905f6e0b68c7b314c15cfb576922a9506131acf3de13d344ad58c3de. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTL92402685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63382aec6c53a83be809dda4cb54bffae84242c548a553133591a57624bf108. 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/QM7282458276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282485a5dff3ae2dab279b27e3ff9eea287ced719acf4de397e545f730bfa56d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBKQU2464750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564b5c723170a4d709a1dd36d455c8209d73ebfb0252448241ffd6b356bcdb1. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBKQU2464748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b99e26d5cb8e699d38d6c3d274ff07fe7b95d095264684241736e992d86703. 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/QZTB42304671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48eb97d7981d80e4f37f9f37b4093a3b8efa44902c11e9793664c086676c16a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBLV62138585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ddda1e0c9ef7c9d4e5da8f5443552f433fa50a2237461dc0963ea14bd1036. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6TI2145417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793878e708cb953a069767c70f42140b80153eaea356ddf4317df2fe67e6b51. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBRKQ2144229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4576907b4d35bdea222fa9395abca4e7ce6f63fb4b86f17cac9c8aa651585c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2192686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a510181ba466a6001d2ba3535ba6e7f40b5a1bc7f8dc966bc5b7eeeb179c700. 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/USLZJ2192688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad73d9045f0c94bee4970238391f28a21e2289627d5f495e085cf8a7d9069074. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USLZJ2072542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef15f489a6f0ba96d7afda8d28a9789dabbe513936b990ababfd02624673df5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6G2015711.
Nothing But... Pure House Music, Vol. 13