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 0x0975af2a3b422691d559cf8f2aae0918e9ca02e73652f43b4dc32a99e0bfe0b7. Chain 2 (Bitcoin): anchored in block 953930 (2026-06-16T10:36:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ee91008-8076-4448-89b5-7feaca8160cb.json and https://artists.proofprofile.net/proofs/artist/1ee91008-8076-4448-89b5-7feaca8160cb.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 0x307a2243f095f2c817f11e5a20e3182ebca56ab0739a52531eb1f26de8fc2c05. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6F2528166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c4c087caf7c28ae009a7413cba4faa38cff1998e8bf4d1959e64b80704c7c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMEQ2565225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b176767b87f8bf665be5a08e5406678d6ce931169c591765a774c29c4e090c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEQ2565227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61215cd63fd89669dba838abc625c7181c46ed7323b7f08f6c3204312892bc5c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:23Z), 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/QZMEQ2565228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165bbd7950781940dc3fb6bcbcdfe5a507aa4011cc8ca97974b0070762ec3409. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:57Z), 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/QZPLR2533788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac95c0f70403b1f08ad30a93e6de8115c4259a2ed468485e0b2ea637da67c7a9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:37Z), 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/QZPLR2533789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd0f4c3d80de224e329f901d1a81d086455c25d5f6acabe123d3ce419309b88. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:40:43Z), 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/QZPLR2533790.