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 0x05520b49f143daf11ea248f5a13ca6afec0860844969eea2d1562523948b187d. 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/41649605-82b7-4cb4-a2a3-29a0b26c542f.json and https://artists.proofprofile.net/proofs/artist/41649605-82b7-4cb4-a2a3-29a0b26c542f.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 0x799f8fe291df5d9c18cd1159c40895ac8a562a76abf51d9bcf44b0540f987d3c. 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/AUGBT2419360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618e942c79d4e74228d6a16a030789739928228e9a8127f1dec58f20e4973691. 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/AUGBT2419361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18643bd8ec2c529f9589968af4349f33304ba6f6121889726d0855acbd3b33cc. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUGBT2419363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865818e696570c431fdcc3f8efa33200b14721223949bcb70306a0a46aaea9a3. 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/AUGBT2419365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be394ad7a732be6193d628ed5ef83d8fa7fbec3ce5a1cefdd5c298c8d4b0bd4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUGBT2419366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c842d1b2945997988e0b9d2cc3d8094c6b1efb964d8ad806c1a6ae73896cd1f. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/AUGBT2419370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a731ad63f700bd166ccb003d35d3a958f2b017f643583546e74f3ec9f3c43. 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/AUGBT2419372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb255be39ba3b9d74b4b46591187e242973b34f5fd1acea69cbd88cd3b81d5cbf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:01Z), 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/AUGBT2419378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e18fa893e1b570c77ca87426bd68f092876c1c52ec25059e0ec14c7d9080b1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUGBT2419381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea3428b2bfb3984a0b88bccd96e7cfd2fb492d75d9b87a6ff654dd19b716ff5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:21Z), 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/AUGBT2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07852210cf92860c342d832059ffca285c1afeeba9bca656eaec0d52f12c96fa. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AUGBT2419386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6649f8fb4e9205a509a68d03dd1107b9a85e46318f3021a4d5d2275ed2283f3c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:46:54Z), 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/AUGBT2427687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc347118094e70fa374fbef8b465b59df4bbab6bb5dd020ee74963d005e8a7e31. 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/AUGBT2427689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb071c7446f4edbd3a18c07c3055629b2c8947c00057dc120f25eb5994f4dc09. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/AUGBT2427690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72f955a875a637c0dce88157142491413261aa3a041119150228c2c7684ad8f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUGBT2427693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda23619ecac99366377bd94e332683e355157d06d86547cc417c87d77a4fa669. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/AUGBT2427696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805f6858f88c324a55ffef561c39acf679f3a6a4423e95b098f2045869a7aa32. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/AUGBT2461985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca53f4498483c1000f677bd685e27c8bc2b8024f3cca72deb8a661d25d51f7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUGBT2483470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c495866cbd3bed0caddeb188dc9f2211779b6fc435a07919ce9c400f86aaf4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/AUQ9D2401346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c2f8075faf3b4995fd9347c792c7890d1a1b2c8827422719cb16d7cf50f64b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUMEV2500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe157e84daed3c9c3c572fb2e7fe9be8ec92360cdd395d5466b6b653531e9e92a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/AUMEV2508463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa0a5c4e50a081aacb605489a1c7fc6c258b34c07315a49c37e62ae33b82567. 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/AUMEV2558607.