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 0xba9f09dcf1a7b5ababb063ea6a908b46f05099a6b45547c81a7f2a5ce8846582. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99fd5a49-6634-41de-a469-e380d731f3d8.json and https://artists.proofprofile.net/proofs/artist/99fd5a49-6634-41de-a469-e380d731f3d8.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 0x3dfc77817f0a15a654529cd54009863ff51be1a6d4a050cad98b4f118c426424. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USX9P0793522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5091d5122c048a56dc923bfeef409161c6bdd7b9597b2dd3810bcd368f9882cf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USX9P0793524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4662fec1c12e6e5bb13f20c7b4c22cc1a7afebe155cdf2f193d0189915d49d9. 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/USX9P0793525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da6cbe2dd1b8874f045387adb42699c14a271676fed4471ec1231081c4f2fda. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USX9P0793527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f9515652dbf8d521aeae41d9d6ac64d7864ef0e11e60c3af5522f4ae41161. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:13Z), 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/USX9P0793528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae33c861b9ef5ba8aea9095013e7433ce40db1030c1c650ffe5fffb4c2761b4f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USX9P0793529.
The Ethiopian Millennium Collection - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5c38404586b6ef5a1c0b2d3e86bb1ec0f3626de40ff36028e244ded96ad929. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P0728113.
Shemonmwanayewa & Fikrë Hoy, Girma Wolde Michael
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0c38b28c776af47fe6014288c4bd4075a50324a56abaf348c72509a30f653b. 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/USX9P0728116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099279027c7bb5eff9f45dade668cc79dbc6e7b6d9ef6df51666f3150d349e1b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX9P0728119.