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 0x85588c174ce024a0feeb8bd654dd56cdffa9ac447b3169d913ac28e426aafc32. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/809b450b-7a11-4e33-9e11-6632aebd7f7d.json and https://artists.proofprofile.net/proofs/artist/809b450b-7a11-4e33-9e11-6632aebd7f7d.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 0x2ebd8aef1fad5f84a88c4b05e812c5f85babdad4a419a93eaa6a21d0b6a5d36b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAT2318920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268c011b012f0431ad473d9d09f556f3a94907012bdfcfb1d42ea07c4e131462. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAZ2360733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ab441e9707b1c985e084271d748e0538786be019e5db68e65a3f8b419a468d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA62427585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de68a9e2c77bd4826554b1e5b99abe9d547f17f92cc013460cd7ef3f98ffe8c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:12Z), 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/QZHNB2486219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1600b539984bc8b534cfdf850de5f0e7c71c9de807dbea7acc266de6196e4e9a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWW2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd409171a7af3ccd93b4823cbc25ff8691fac0af72cba047f22caea79c9088ba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB82421908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c07f442e6a4cdce6e9ff13e668653113e816572f5318072cd69127bcfd4dc4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7N2485399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708305720c5504693b0d66a7e12d4f05c811f3dd6ee4392a10f5a6ef452036a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFZ32576318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ca2cfd1ffeceee9a577b15e031565f25c58901f45c8e4c1e68ca488d92d461. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUGBT2544028.