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 0x52da5560a466ccfc437db4e7ab355ffed93479d4e6b84a656c9fbe3c4e3c360f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a00decc1-ab21-428a-a763-2e3ee926bc59.json and https://artists.proofprofile.net/proofs/artist/a00decc1-ab21-428a-a763-2e3ee926bc59.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 0x4e842ffee15e7911b3b2f40851b32953a447b2ce1bd6216556e897e358444a75. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6J2163360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33f5ceb67801385cadcf3ce886e2e1217e8353ef6409c3d0c730926a40e1b7b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:25Z), 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/QZFZ32279161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5602c0f15ca0bb3d112b8d4f64556811ca1beb399c1fe4cda548cef0b13a613b. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/SE6QE2337339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c8ee7bc2799dd4f72fdd2ef4a9c127388e72a0fd432675ca70a5451055f83c. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:03:42Z), 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/SE6XY2329918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cef60c9afab2d669f0ba6637a7ce0f789bb934df31da7a959f559bf86f608b. 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/SE6QE2397063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883bc48ca04d84d8f3a65cce58b0e392569d03f81cebf12eb743031de07d2944. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6XY2373481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d2ab3e51536169741edbea58fb432f9ea3001b177a37716840121db5d59313. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/SE6HN2478185.