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 0x28c4aa27d0bf61d23b82924309d26f10b1f96f26b2fdbcc106cfe0122e31e206. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc0f9474-0d6c-42be-8d3c-53037839d63f.json and https://artists.proofprofile.net/proofs/artist/fc0f9474-0d6c-42be-8d3c-53037839d63f.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 0xfe4e155b66fa33da50a02214b4f2ed5a129702a7e49b461f8b43d60c6eae6ff2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GX38U2185724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9f5501e702d323e992d600ce0e0cf298c96ccac00fd436601a855e50174d55. 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/PLC062230584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94180907a1994f2ffb427f523ab77827c9593991e93e40f8893731ee5133988. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PLC062247490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc6f00fed5feb88b58d0a1191e0cdb66df70ab84eac8d69017e0f854788a2e6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLC062388349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7214c7636e3a7e5795b6be622c84aa14c47a6e4802d7c733e210f823033b685. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:37:08Z), 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/PLC062392548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f5dac912d487f306e5dde91ba88084fc48de3b443bf4f89b06e61f630b7006. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:17:50Z), 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/PL0B62456426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf119d5455e743a732980be12da0d7d16265d53fc0a76a6db119ec7f06acea77f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PL44J2522601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9900ffc4af5158a81e52bdec43d8b7a0a067a20fcc982a7567b2638785997a4f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PL44J2522602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ae502c0a2f3c81638e23cd413f1e5cb5405e00680e5d2266145e2035862a59. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PL44J2522603.