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 0xc0dbadac5c6135867158182d196094751e80801843e92ded76fbff98a9f65a57. 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/c80a5b47-8bdf-4709-b03d-508ab23efeb2.json and https://artists.proofprofile.net/proofs/artist/c80a5b47-8bdf-4709-b03d-508ab23efeb2.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 0x589a88b86af95ae57e9a73541be76bf43db48387cf8c746f7db3a1a4fedb209a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPH1861982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ba1a7686a8960bbc471b285bef337ba1705fa4115a694068b68da095d67b7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:20Z), 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/TCJPH1861993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7df8001c09bb6b8bb8d9a02fae43a6b6f165b5db9434d434f70707c2680ae. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPG1872416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9df74abac50254e1697b5147a3a167f9d0ed3b37c6b637c50af5958f2ce6f9. 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/TCJPG1872428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecae8915da4d32424783c62bad4f8feefbc234c28fe64d0e2c236f68884ff5ba. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPG1872432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb559e106a54b434fa268b54687720fa1e130375589c6a139c9939ef326e275c7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:24:13Z), 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/TCJPG1872436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d898516fb1b11e133f73ce5faa7688a8c7d6d21f0a7b0b0f83e7ada281219d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPG1872442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84d8c38a4713e0cbeff4f6ada221861c3fd99065ee99efbf080fc8a081b742. 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/TCJPJ2582900.