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 0x692f936f9441e50089fc0c511c718c7e7ecda1caad76dcd60100c2ed752346bd. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/433840f4-9da0-4df5-a123-eabb472e4e9c.json and https://artists.proofprofile.net/proofs/artist/433840f4-9da0-4df5-a123-eabb472e4e9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Leul Aswededegn (Ethiopian Contemporary Music)
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 0x8b70d778c0f1b66926212dd69190b0d1495377e85b5741ef814bbf070243f21a. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USHM21273523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5910589e393faff9a673ad8e5efd240b4ca15b3b2794d7bc8114d3c92a9f99. 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/USHM21273524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeefe07822201b40f08c8efad3141545fd8b20ba472faba0d8a3275baa67a2b. 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/USHM21273525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060491a6ff55be48c4c288a8a34fd536d4356cb248316fadb26562594d26044c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:21:37Z), 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/USHM21273526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ed6eab076e5e3fa7b46ceb566768345abf26e7569e234cdb3582a7370d7c13. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM21273528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aa0d72b59216a93f47bc0d0a401324e5c44eff9f0507645b89b42dd41e674b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM21273529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd25e10aac15500522fbd7f7b47471298777e54140b7cd8a4b86be56a711773. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM21273530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d945f53847fc99970c017fa1fe7c3578a7eed5fc505d5115e4d7042358193. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:56:30Z), 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/USHM21273532.