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 0x2fe0bc2e34eb79b2e6ca0eb5c61b6f782c5c05ce060d99c8f44c924532c827d3. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d97f049-cc2c-4c37-8c9c-07ff53bc0895.json and https://artists.proofprofile.net/proofs/artist/6d97f049-cc2c-4c37-8c9c-07ff53bc0895.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 0x9a9cf3e53b51c7ae3416a588bd6a0421f2b69de0c82f7da795c564d3802af3ad. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXF9Q2579656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a223b9208b19e87bb490ae0f39607aa7b17eb826d75331fbae708cd5e7c839e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:33Z), 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/QZHN72503028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e196f3ba802f6c4d2dd3905b6c2e900540ca2318a59a81085a33f96d4f557. 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/QZHN72503029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2766b7b3c0fee349ff5ec8cf97e71e25c6670cf6df73a39faa5ef1f2c95bd32. 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/QZHN72503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca68d601006345f158175547470fc03bf08d2803f2eea605e3545e9f7dbf855. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:04Z), 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/QZHN72503031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e574bd09b9b90d7f6d88a6f693bec2612feedbb1b5364fa54c4c2c101ac3775. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN72503033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe320f7aead5024f7277c0037938b1fb97681d89e5914a9fa2c41aa5373dcb4db. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN72503038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a43dd44e9396a88bc32722dba15c818a07b52849e3f11c231ef3bf24d1de74. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHN72503039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073eb2e02e0ed01ebf1420f4574b795711361528d8df53b861ec2c8b019adb0b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZHN72503041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857713784983cc70fd46230022cf4f00f5a9a6286d997941c12d78a104ac2668. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAW2563471.