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 0xc7153ea2bd183deefd178fcbd79dd5c28cd38f2f54a00f84e4b9d51213db2b21. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bceed32e-aa68-4585-af8a-170e1bb24be1.json and https://artists.proofprofile.net/proofs/artist/bceed32e-aa68-4585-af8a-170e1bb24be1.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 0x0926034d30c8fefa99c0fa0e317ecb238b1cf114279d93d9e628e266568f0377. 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/QZ22B3005239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f890f3d937e6fed6bc98482b25b3dbca40f7713bcaeeeaafa5976ff843302c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:47Z), 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/QZN882079333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d73e54aecbacfe8cc4b92d91724cbecf79e458ff71f506953a589712d40e6d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:25Z), 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/QZN882079334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db27780da483d6660855cc03748746a2daf3a26bb814a0282352edb33ac379e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:35Z), 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/QZN882079337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb85b2b0aec01d812347abbd34aa88e97cc5f5c3f9e20f04d0bcedbe737500c8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:14:29Z), 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/QZN882079339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa73f7de160049ca8d3226ec8247d4861a1a6e85f96e11b911f9b0473f7773af. 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/QZN882079340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894a969d5663b54780687b3f6c38e4869e46e066b9a9e8d83f55c434df9cc6f6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZN882079342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368a1160d6ea9b2d88b231c2e5ca651c0308920890ee78919473123e2f6dbc30. 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/QZN882079343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062bc3eb422a3cae7a396274a36abb59c75a4a3f72903bfca3a537fbb74626fc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZN882079348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8996cd0f590f1c5e2bfa282c385814921a1b8df6550d23fdefe4c41124eaea. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:17Z), 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/QZN882079350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b1133e6984fc60b90f34d67b1a86cb2f20f954f49766d6eb73a746358bb33. 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/QZN882079351.