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 0x02cde4f085dcbcefc687337754861dd38c50b49be11fbf22a9559e3105fe6736. 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/830e2f6e-839b-482f-beca-68512b0cd04a.json and https://artists.proofprofile.net/proofs/artist/830e2f6e-839b-482f-beca-68512b0cd04a.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 0x67f7d5fcf8e387b346491324ad5d557aa78ff8a20b5891399430418e180e2d74. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:07Z), 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/QZK6Q2012889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b2c332c180b91553da80f2e754b1674a43154d0d9ed6bed14492cbafd45e4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6N22258455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590fe6281ea00a57d080b5622cbd6c99e3e8c5cd65b9a6b98e1b638f632ac7fd. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QMDA72253407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca48301ba6c1bff8a107142cb821e8e84dbc978074c82d12a3f32b610e79f3ad. 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/QM4TW2277044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6f0b3c40fb933aa67421437c71c023d52899d7cc9b18bf3e7c8595eaaea7aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2350983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63fe03b2f51833c24d3e9e1e52a435016d82e385e8a1f43123ed42f289806ec. 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/QM4TW2350984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2329c7bc5daed5251205366775599441590a8761ff2830eb5cd3f4b06f8f717b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA72272332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245e860e9f9aacfa9175583c9c3081d6e1ad37062489765e7c8ccd3ebd7a9288. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2350980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be241d963de4194c0881f2226722e3cf8a45c1b1e0ac700fdb1cbe1130ad936. 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/QM4TW2350982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b2c332c180b91553da80f2e754b1674a43154d0d9ed6bed14492cbafd45e4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6N22258455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c161d2829021de9c84504ff8964811fbbdbc0a2641a9e0300be46c15930021. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM7282347880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71312910aa6f9d567fa494de35a15607e433fb3349365eefb7f3a955dc6a45e1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2462604.