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 0xae27d43385938b55573789cb25db990ca31c9b2e88674d4c78ab495d71006b8f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cfc0298-256a-4816-9a7d-1ae92ae23aa5.json and https://artists.proofprofile.net/proofs/artist/5cfc0298-256a-4816-9a7d-1ae92ae23aa5.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 0xed2c82b0ff306b414ce05f2f7e0ea864d0e80929624e50d36d9d99d12edffa04. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/FR59R1636911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72927873cee4079b013a626d3a186376a74a61e64bb714f8c85f9ec8de3726. 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/FR59R1636908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d975c27a46d899d53995270584913102a26361ddafe10fd3637263a75bed3d7. 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/FR59R1636917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d6160e7721d9a7a489478b6c9ab75ad66d87cdc72d1cf133ed33f6ecb84a83. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:36Z), 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/FR59R1636893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ca72e28b0542a61ef5b1137b9843536951c0c5a83df6808f6fbfff7f91e89. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR59R1636903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a4a27946aa52a2f18a7ae7de106c8346222bab4bfeef45cbb94f80b699a11e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R1636883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88186654069df66178a9c1fa8eaed5db815f63ec6fc20af12ea0e021b9857d2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:17:55Z), 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/FR59R1636884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccf03f840cf752a6267a69e9336f6c94eedceb3d4755ed46810f2e42c3619b5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:27Z), 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/FR59R1636866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b0de4bc6956b4dfdc09ed2201bba3f063bcb130da7b39c485911f405a87d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R1636871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3be92b5864afe855cdd2ee224dd1df2cb4815097242ff6dfab57d56f5ece5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR59R1636857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb785d70ddf9346a051736cf91f51bd03b508f7a7a3b57f6389a68a69d981d311. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR10S1699029.