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 0xdc2e50e0eab7ad71fa820c8540e06107bc904058ce1f66e55c5535be87c9daab. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/237cb063-dd7f-479a-a10f-dabfc8a6aeb0.json and https://artists.proofprofile.net/proofs/artist/237cb063-dd7f-479a-a10f-dabfc8a6aeb0.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 0x69fa1d2f51f72a36b20d7e65d0d1d067ef2fe98a6bc7cbc0f1ca3088c2e3f3b7. 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/QZEQU2101607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c6a7cf50d4ee1798311164f24c7250e48f147ab7e469355b28964a92176ef. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZEQU2101608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd7d766ad5e00bbd5cca555485aec2db44fdb2ea34ae9f571f7adfedbdc9486. 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/QZEQU2101609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76312b298879934749c2309a5b4cd8e79216bfe4b398fd31b6e25a3502a341d0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:05Z), 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/QZEQU2101610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eee004c3a64a4b62fb6c96555f25a570eaf548103e5f12d27c9526d4b4a55b0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZEQU2101594.
Poesia Acústica da Putaria (feat. Barbassena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fac6188b8d9c2a4150b3805f70a1378adff53a0245d033fb7c6b2a7107eb6cf. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZEQU2136161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024c0c7e43caf62c67bf2de49d295f2757a259e7284b51ccaeb6b545a7e11542. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA112307995.