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 0x6a9975f9cfa4af39d40d306bffbd765b6e75a0ba0ce987ab572abf870aed6cfe. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbe03789-72ca-41eb-8bdc-6d225a0c280f.json and https://artists.proofprofile.net/proofs/artist/cbe03789-72ca-41eb-8bdc-6d225a0c280f.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 0x2a342ed5353b8b95131380c337324d2ad81367ff56f273c981bf289046058cde. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GXH2J2514744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aa92208bb6673b97a2902d83e07fbe64cf84c0d40feb12c151466cc1be5fe8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GXH2J2514743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7f15a35fd9e1017bd0145c970f9709cf42002cbf18025f91429180ebeae58b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXH2J2514742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491131e0819d279993da557dd11a0370be3ff0e2b94aa5418624a02919d88361. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:13Z), 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/GXH2J2514745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b9145e2e4793cafd694868e5a4e1faaeff56075a86a4d7bcd1ca8886929459. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GXH2J2521018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a05dc38f48cbd931f1bbe15c7ef378fe18a3c6a0a1ae24da4b5717e0974722. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXH2J2528622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d952dd123adca52e055125dc83b17fb9219a2f065d99940494df7c92ed9f4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXH2J2528645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e3c439ae7392543d1389740d0ec5ea24536353d8a3f5597accabc00b4b5629. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXH2J2528714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd8f8c53390e62a8f62fcf100cde483e9aaff538ee4c72180189804fd16a842. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXH2J2535462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55909dfda50707fb6a0bc19bd646effcff9f84ec5b80a272543cc307da9ab599. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXH2J2563612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb18d02914f12dc4dc0f33c7ce6e0def9eff4c1575b66b6fb5dc59035172de0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXH2J2576282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c02302cda6d9449410e937452c174d63a3d6592d6cade26a68986eca9d803b6. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GXH2J2576276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdace7b2ba543e23e36f0b7af04d2f9ae7a832d7978041d306d1f9d4c5da5ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXH2J2576290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e5af31814c981bff3fe9e2fce0987c8b656be2456272f25ace21ac19dd32db. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXHG92571119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759f87c2a8350566dc8c78c41bd5c779a8618104599c3cbeebfd03983f9b2f21. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXHG92570983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845b5474c06940bf20f6aa8ffea6db71ef1ec25292b49396f671986d66fe9f9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:05:40Z), 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/GXHG92570961.