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 0x04aaaab2d8f901c1a1a3c465d7de22a645c9d06d674f7d6302c402fa2f43e418. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6bce3c5-fdb5-4805-8e3c-ced4bb86cca6.json and https://artists.proofprofile.net/proofs/artist/b6bce3c5-fdb5-4805-8e3c-ced4bb86cca6.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 0x4adc7440303aefc0e911a167681e90c11fe9d873d9c16f25fd40969d2e41ebb0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NLAM42300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427587a55adab0e61258d45b8d9618fa3ef939a1b7ea364fb3df3b96b5f15db. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NLAM42300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31f809c48c1ccf762e67958771ff54f9d6a3d973441388918b50fbfc6659266. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:41:21Z), 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/ITOFY2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aad6bcfb2ee2fc894b7f4a1705d80d730daac4c5ee32cd73ce36fc6243265bf. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ITOFY2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff3d3b2f4e34b26c687dce8512010da85992c411cfeae82480bb3261da23d4f. 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/ITOFY2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e7cc34ea850c642abeb14121fc26702c33157bdbacabe25555bf85fc27dc90. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:56Z), 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/NLAM42400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc523a8eed856cf6c48db24791d9300f7277fc3db805b413fb93d3f0c18e37b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:40:53Z), 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/ITOFY2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b7b1432d93d09ec553dc50a52580d3fb0387049e7f235281dd5d488dbe637d. 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/NLAM42500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249dcd236f8abfd98377b16aa9f2b1d1b85fc5cae68e0b272d4f822692e69d00. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITOFY2500037.