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 0xed4b90ac667cf83448cfe7858c53624a53b7ff0d1b8d4cf6dfe74953bf09b5e7. 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/040a3976-ea3f-40ba-8ea8-2092778499cf.json and https://artists.proofprofile.net/proofs/artist/040a3976-ea3f-40ba-8ea8-2092778499cf.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 0x879363f2c87158d18b3f2ca6076e1ab2fd1c43f8d3da8e8d4c5ef664be78c07b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:18Z), 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/QZFZ72094816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f480a023eca7dccd77a279a0b47c246a132a2c5dac9b81fb99832c1db5dde0f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES62258872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da40bc31893a9d2642069d26f16977034387f41e269c3a36292de77e0979b49. 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/QZTB92379975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aea339df1cc0d72b98de7354842d6be90f85d5c9b50c01951ca6bcfa030560. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZMEQ2486952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fb5216c40a5af4a396a788d6dfe283fbb9593db2e9104441812a6e22050bc8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:43Z), 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/QZTB52454672.