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 0xcba0358b67de45ecbdaa7c59a8475a58c397dc555ab9b52065e2c065a5af7489. 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/bf653b39-6903-4d6a-8e2b-582c015baa84.json and https://artists.proofprofile.net/proofs/artist/bf653b39-6903-4d6a-8e2b-582c015baa84.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 0x32b8ccbd9f7cbc044418327f5e0c9434d2746fe3b89331348d02ba5ad1693b82. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEQ2192705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3826d7f040cf042d5f45d30a93d605e0892ed407d26e2fbb6710af1ccab4f50. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:09:52Z), 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/QZES92176010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d69af327b1c7692fdf750ac8b48c0f77b516400d925f85968794b2d33d3fe26. 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/QZHN32126790.
Xen Kën Rot Kan Waar (Mabior Guot Garang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9bf9d9712f62ddbf60035ec2915eb71ffe0b6be10d9de58e3875919c111b01. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6M2113022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7a3febd1c84c4197950df0ca76bb01ede70894b58c7fe35d5ee11f53b629b8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZPLR2184434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a120d7cd04e296d7b77e5ccd82363ce3f7eed524ac6c08d098b59b51937cc5. 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/QZPLS2457921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cf0ecf96d4cb226b38c0490819f8d18af5f0d4f5a79cf36b647de9d50ee2b0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:29:14Z), 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/QZTAZ2456135.