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 0x6e4eecd01a93e0480f777b891375fb386f1abe20e5d5eab69bf29f5c9e4fa1c4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d85f3ff9-e3dd-42ee-9c9b-1af7686a49d2.json and https://artists.proofprofile.net/proofs/artist/d85f3ff9-e3dd-42ee-9c9b-1af7686a49d2.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 0x7137b12b497cedd3d9d1bc2fd5b8e5eb1f1b423566218b4d97e5917535c3abf8. 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/QZHN31904090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9168772a6e7b8c58fa0bae98234adf76e0abaa0208c2944bdf0ac0c742f7d87. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22220476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab3323dd83dbb482019da2532357df7aeda2896a134fd15ea2dc51ee7e3f463. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB22220478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49716456c81798330220621323cc9ee42f915fe2a037cfe40c6bcb499f41ef5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:06Z), 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/QZHN52211005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482e1589ab1d37fe3a4c4b87eafaf3a9598ec7b029713de1f8da1bdb178208ba. 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/QZTB22220480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb3f13001e04c3fbc81b27594e06a0916dabaa058ea2bf1919d23171c3d1754. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZTB22220481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d622be9ef3867b89e45c476c692d8bc2f66d4c9d244f899b0013863bcce95d6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB22220482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c9884d7927a9c8aa13a37fdbe5962728f8847dfec8cb76e2fac95ae94e12d2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:51:17Z), 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/QZTB22220483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf7a1c48f9606b3da85193a12eb4e19550984ffea22714d241274ffbc2b84c3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFP2398875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25737dfff9fbd6ddeb83ce3fd2203c12e4efe2a6ea7d2be182ccec3166c965e. 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/QZNWS2453412.