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 0x21612346a223d296e826abf970a3f41ba87cff98ff65adb4db096e7e00e454d2. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61eef298-5737-4f4f-943f-899f34b0d789.json and https://artists.proofprofile.net/proofs/artist/61eef298-5737-4f4f-943f-899f34b0d789.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 0x61a6d3ee00aec34114b6252a6bda10a9b2a475a9359c24b8429122fa8b473bcd. 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/TCAIH2420167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf56c66261cc7e6c26e14e84f4f239aaa133431b39d959d517181f9f765a355d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:39Z), 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/TCAIM2476650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a820bfbf315a36bfbaba1699d064191b2d19813ca199c6e7e0f7a6acfb748de. 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/TCAIU2432255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3730dedf9f299025f0a9607544127b778a4652646f181bbabf378c3340d19ed. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:47Z), 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/TCAIZ2434412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35f1e8952f720e817ce4ac6f4d1ed98ca23dd6c58d24be4cf410e5ef477ce54. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:47Z), 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/TCAJD2498252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638bc796300c537d9f639997cb02856e325798f224630b4c4ecd42fd1a53c8d3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:33Z), 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/TCAJM2580746.