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 0x8f95039c2c925c469b549c4cc24ad744c1e681a33094d146998fdb8ca7e183e5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be47ad6f-4c04-4008-a309-65cf2b31d741.json and https://artists.proofprofile.net/proofs/artist/be47ad6f-4c04-4008-a309-65cf2b31d741.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 0x5daff72e059f0eeee3f6541d52aa8bae40e10dc64b5f58aea7486c1b10e28421. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDA72021190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8e90e1189f4402d2e091bbee50faa2d4f19e2d05b159a05f8f4283b29e36f9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:34:42Z), 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/QZHNB2082343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040420d37f9a0c78e8a5401fd2575799ed4684787e0e4f46ad4e10207a13aadd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWW2052534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b29d1d58e01fdb0b544dc449dd3efd7f7ad5030399122699bb7d051e742b4d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:35Z), 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/QZFZ22186337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6ca58db89568f681a2cc0f03bcad587d40a2461aede50e53225ada06c5346e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:59:29Z), 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/QZDA62106725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511441a8c83c10e9cafcd2687be825471007bab41519c160839b67b2cefe36c. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:21:24Z), 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/QZHN42107386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a2afabaad4a5ee4c0b4333e8d566bdef38167eba8de4dcc0acc5906918d882. 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/QZHNA2152497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5119a97892a484990f37ddf86856f99c0ee7acb6d35e86410295586c95f20f8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKPL2164434.