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 0x31b3015e1cbd73f8f5bfccc2e59ba2c7c154d33c7d3da892809a35531050cc66. 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/ba0a8a1d-9f5d-449a-9dcf-69acbb9bdf99.json and https://artists.proofprofile.net/proofs/artist/ba0a8a1d-9f5d-449a-9dcf-69acbb9bdf99.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 0x92802d1dde76d87529a4640bdc237829974958e1280bbb1da92a3800d7af81aa. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFZ42241594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8041b210383b4b7f6be28279c43c83e3e05c769339180e6e9634383f8f09cf6f. 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/QZFZ42251977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53847812c851a3b936189f783998d7529294cf5e5551c0078f52405995e088cb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:18:53Z), 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/QZFZ42243399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5251259f2d061b889a6c2b9932b79a098c1dc572a96b2d99f95296bf495ef9e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:52Z), 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/QZFZ42253061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39443efb17082b233de5f18b075a6e7fc6182124a28ced7c008f774ae59f5c2d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZFZ42274870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa41e9ac644dcfa0b810cebed1c13b074495663c050bec7de593a82c4e6a2fd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:33Z), 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/QZFZ42320714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02e2c78feba1505723f79403f7cda0e720c79cd6cdb787c86e44e92bf8e61c. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZFZ42345454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea777a913dc21dc8d66304cecc0b3f561b24fc9e36bafd665d84039dc00a3d1d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZFZ42351802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe408128c6589baa7b75b7fe5b06e43444c117258d9756f12c0ed8b02c16cad96. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZFZ62312699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f20dc20718cc1b6c695d0f8f410b803d268ab0b4aaf78b597f296c56a4c09b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZFZ72312599.