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 0x2fd65ee2a8a967c22a9bea6f7788a8b9131e7a81b17228677ec293da6e55b21e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64c5c49d-a923-471f-8d21-fc01112aba92.json and https://artists.proofprofile.net/proofs/artist/64c5c49d-a923-471f-8d21-fc01112aba92.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 0x73996d2432aa68ba929d132e7cde5f7b9ce9d5f82b4236f311b6a36e9b9e4d0d. 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/QZMZ92339927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe059e3a2ba0c0c35cb4878a1a16573fae89d1af20456d5910a3d836c39e76d9f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:37Z), 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/QZMZ92494413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41cc4e1c9561a8ce14809e1a77c3b62a45a56efcea00608cfafe4d7b29fa9fb. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZMZ92494414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f1fc901926ad2d51fd0c74ba1080c889e0883f22b9ba0b641a3dbc002c0a09. 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/QZMZ92492076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2335c7b8e28976899219cf28e5543ae3283e16328c8708798a89f7a419e6006. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMZ92494406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c81212795a638f02f7a69d127312330b1134169333ebaa22caa9e91912cdb10. 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/QZTAY2563950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff90c3c60cc4bee2abf4a28e1d9f13d676d11c2f24cb35cbd50ff47984779085. 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/QZTAY2575352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a946e9bd6a0382e43a6c316c793f512ee906804e0337ab899ad78f16c5b549. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZTAY2563948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae46d3e55ba5494c5389e6f7eaedb0892e0b061933910c73170e8c32cfdc52d. 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/QZTAY2563930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2463e0db88c5414f99a864d49f46f434a939d99996be522df9878223ad2df10. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ782583918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0696811ebbff950506e6c237718dc40987495f1d496d7a5de67581740e3a25. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ792526343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46030283b4f4bbfd895d3ae3101c77d48b3d8fb07787703644408e80a4425a2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ792526317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a1d642a0c8f85277a0ad4ea51eee92f5a1e18cbb7d2af8b30bcd6e548e247f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:48Z), 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/QZZ792526375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc590a9cc017645c30a56ef33a946c59fa75e166888b10eb90659351c5622bdf7. 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/ES71G2222413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369654cd9def76ba9488b592f288a109cd57100572f57e82d8e6b02d51bbfa32. 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/USLD91733004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b413b7a608841f78086e4c93c0d8711df64c104941cd22cf4b45e4643b2fe07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNJV2497937.
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