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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf302336ef82eaa422214e1e8d1dd8c092bb81cb8458810651e8b2d897d889d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e92b496-7840-4e87-86e1-5d551d81a806.json and https://artists.proofprofile.net/proofs/artist/8e92b496-7840-4e87-86e1-5d551d81a806.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c377d52ada8c77aefb60192265d28fcf528c382b9c29107fa25a13cc7042a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2204376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0298702485653382338bcfe5d03d8b3327880590fef0572e8ce1a9fe487beb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAN112201220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae655afe25c03ad228b1ee08b55a2df4e9075823401765ffcfb513887743c67c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TLREW2223039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaded1972ba497a52d957450bdbb31fac0887f47a2f4edcdfe915d053890493c9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2203156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab216255a5b504186941b8b91408cec655f387d7ecf68e66296aef008c26b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6I32281059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190783000ba12cc31e95053481f2a05eccc17749173ed2c88bc7c0c3797c49b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5752245923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2e9ca6d3f919fe82c51304b28fe0ec612c17452d5dca33b20ecfd1b6e8a2d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5BU2168956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72278b808c4da50ff65796e35fcbb8788fe252e27acc8bf76a40123829790377. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5BU2168792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64627ede51c7f0165bb9e2974820e2a09600a475360f0ecd293cce302bbf2d4a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2116242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4309f63a9b547e3c7e9bfd3998b0d945aa3aa0f8166d104e01fc0249c77576e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6HN2140482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c00689a1c086f1c178913e3f299f5d8d5a8a9a522c3e4da40c7ffb9e3a02c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6HN2140483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7e096ccecd82e564bd8a9bc0b3367d1c7c3bb9b145379e2872b415796b9c7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32169829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c697a5fe32436a88026ed50cfc66b79d94b3503a9af03e134af7435f8b093. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6XX2133960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fe44768e07f22ee2994d8a9593e848218475130370b9d4e0f92b17ba68811b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6TI2176478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bd58069d8054f6f01add0e54dd131f473d6cf448e9b99d8a50ad356e3aaa78. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2174232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0092466c50bb5154026086eb7c065912ec2c14fa3e76e1a83fdae973e96235b5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2106445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa871e3286b2f11d09c4d87720635bbb81b9ff7c888e6438383983f2d50561586. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6HN2184765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9dd3651345d58e748b33d2417a672867b8f5082ec00b5264e60240d66e3db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES72171688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4504818fab21fbef37cf641c098ef2179cf98eb228a210aa403e35fdcf9e79e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE62M2170223.