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 0x72b5a1db673558776632f4c6859187204d94b8b3b2471c2c3d395283f2945844. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c124ac13-c835-4f4a-80ce-6a21030e7c6d.json and https://artists.proofprofile.net/proofs/artist/c124ac13-c835-4f4a-80ce-6a21030e7c6d.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 0x78128e699e3170604516518f02364b283a1d9accf8e630b0135f2cce3248ebee. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM91989287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adb25b859c5cee6cece21aa256cb1bd762deabb04bda9d9825d82b5ef7abf11. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:30:32Z), 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/USHM91989292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6cf3f7eb849bb51f4ee1e47a005401a79748e1bc083091535d853ceebb5c00. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:06:45Z), 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/USHM91989293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e25aa72edf3bdd425f66e8b8597460a19f24287d2b67fe03442a310f5957b. 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/USHM21222127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676370c090a463d6b516f3dcfa48df28966f8745b82185f9891d2bacaef32ad9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM21222130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb498552a9d9009f57313fbd102159b034f47f3336d997588d3256428338eae. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USHM21222132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dc6bc0c05ac8df88d9a7434d78242dec92d03a9b301c0fd7a1dfbd593fd213. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM21222133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea53e220910a30d350cc076f7ff4e942343a034f1ee3fbe4243958cc2537d21. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USHM21222114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e4c6d793aca2d89b362c3fbf1ceec76bb0adda6214d0f052f235bf8e235c76. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:54:09Z), 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/USHM21222116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543d11197b10db8592e98c0fcd0196ac1c5333dda2badf27e0f32dfc9ee4f1c6. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:32:50Z), 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/USHM21222117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9076994268afd79a1afd61e87183b1db619c21dd92c153cd939518bc50939dc7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM21222118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01980a1a83096648d71a883c6d32fa015ec1457b2e6417c5cf8e76999fa9282. 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/USHM21222120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9372ad6929ff346b7f28a0c3d011c52ad5a019429d11ecfe11ea4b7dcbf2a22a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM21222121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79037fc8e464fa73dce9687add50239ae4d6d243e9fa804a060fe1c4c38c6dc4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM21222122.