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 0xa3ecf1ee7129c13f064b27d1e1c611e39ad32842e07d8211b92d0b7f3dfa1db1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56abd8c1-22fd-4916-a346-643854503f8e.json and https://artists.proofprofile.net/proofs/artist/56abd8c1-22fd-4916-a346-643854503f8e.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 0x407056c8ac7341d6048e19349a78580a3bcfcbe67484035fef560858d186fe6f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:04:46Z), 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/QZGLS2595816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ff4f275dd4100b0a4d24969d8965fe7583d590bfd690853a9386541e929248. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:31Z), 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/QZGLS2595815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc30bdeb1048770aa3dabd7ac3555c3042c3d8be5d595129b6a3ad1b3f04e2b. 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/QZGLS2595822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c998a654c792f6faf69c9c596eb897649b7300e37f6d0ff9115526d9ddf6f83. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZGLS2594958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9c99b9178f6a68b07359ef885fcb17068e24f27b304ae5482a3abd77462eb2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZGLS2596239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7709252666a8a88932af80e0009e5ba955119bd1826c391c4357a3c09f3f341. 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/QZGLS2594951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd3c2f783eb11f817d91b8cc4576ebdcde1b270e345ac4ee195fbe39b79f530. 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/QZGLS2596231.