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 0xb1c459e57173937891f3783044fcae4405764bc347c6d7c1337f8a1bd52c363e. 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/2e9de7e0-3a9d-4a38-a920-65d28bd12aa5.json and https://artists.proofprofile.net/proofs/artist/2e9de7e0-3a9d-4a38-a920-65d28bd12aa5.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 0x7d1043f7e46a29824fb7f5ef919b85977e54bf239ea49e21980c06331da65fd5. 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/QMFME2364273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c264ab0764461ebd78223bf3603981da7b2717a0aaa34feb155be79a26167. 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/QMFME2319496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f8737064bf31993df23a7b5b8effe400730b6e3a346a1b5e2bd5243f0dae4a. 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/QM4TW2261595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0f99c9483f6c70bbf54d4b3f64d709fbd573d6f9d33257719e9282a02c3d26. 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/FRX762476235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749d5de58d3f81e8205340eb2133f462667e14b26b0f1a8186f3225945491550. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S2462668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eeaee0fae40545367c3b409a1c1af63daa3c4ac05a58d7f7a28b1b7209f829. 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/QMDA62233760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e28d0f99d462a78573d7e9cb9719fd57c1c0fe977573a89ece7b5d80e344e8b. 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/FRX762497754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8632b3fbdb496c4f9629c88281c9648ef5aecaf66e2735bf04e909a88adbc525. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282407705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89900a3c267443a5acc70e4da70ee5df77a56e20a7e799022087ef5e5162379a. 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/FR9Z62300762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e3be61420454efe112b69cef05faff516442d5b08eb5b8f12086bfbb145295. 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/DGA082388140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918551e57520e37aa6fd448282e35a162d1702902fb0afe6daaa9c249bb934e6. 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/DGA082388139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c264ab0764461ebd78223bf3603981da7b2717a0aaa34feb155be79a26167. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2319496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69af69afa50dc9e2e8c6a64850b0886dcf7de140d8f78efe868a3bff8917d251. 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/DEQ022382766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06715f289ea71a13d88905f05a3b98b55415355aca2d3d5fba93dcf5196774f6. 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/QM3DF2260581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205990b11966b23f584e676005c105556468dc9f6a6719daaef83bd245e728bd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEQ022390446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97a82f08bc02d1bd66a740504ac3c88d11291ce81510f349a282047846f99e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:16:11Z), 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/QMDA62277438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f8737064bf31993df23a7b5b8effe400730b6e3a346a1b5e2bd5243f0dae4a. 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/QM4TW2261595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c2bddd10e6ee2f8fe6618bb2beb5b972c5416586787dc931b428cca1725d2e. 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/QM24S2101747.