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 0x2415bca796e54a79732ce25e42f1407ba50a126c26b915672b17d991ebe4858e. 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/fb89edbd-0c76-4a6e-bbde-d1a1dde3cd05.json and https://artists.proofprofile.net/proofs/artist/fb89edbd-0c76-4a6e-bbde-d1a1dde3cd05.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 0xdf8a9136fd176f1f1f22f841447af4b755efd85788f316bee34d738376d78bb3. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:00:11Z), 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/BC8DD2200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76ef07f5827e0c4791bb2693152cbeb122be070135649666e59f14baf35a97a. 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/QZK6M2445868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e0c536e23f493a10cb8eb74f69f0b9e73305e1268449aae8c22eeb2753eeea. 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/QZNJZ2372971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1c8b60a18cc8abb82f63289e5269a60f85ddf214379c6762cd31324b17e3a8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZMER2259918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a230cb2a9c119e65b27b32015d1508e16addd805385a6d30d9eb78d8ce30b57. 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/QZK6J2275416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835484f9aa8f31318f7ff0be3690e151055f0b23c8ff707038bd6d60da80b84e. 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/QZHZ52231687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca6a1d77cd32408eaf319e1b711bfc650005651a7f5b0238d58c7634e44f194. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZGLM2294734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bb6bf1adc5de1b7a6c2e2c902c3c9c166a6da33e5322f76e11143dce6e682a. 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/QZDA52277095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316a33d2af874559121f7eb637daec2201973a6b6c1bcd8812f77705f68c42db. 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/US7VG2224300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cbd5d0a59ca78fa1b22572fc5a21de344b351159e8c4ea8992fffb605f059d. 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/QZNWY2155700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b8cdf110c8d90ac5d98405c2f7960003e45c7283a11d56cde7c4dc19da7e7. 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/QZMZ92107179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480bbc0e50eccdca2b22240c8a1ba997365cc34110295cd6eaccff6f0df7118b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6L2180695.
Moreno Jogado (Mc's Brenda, Th da Serra, Laureta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec41a31c36a7684cf346c3bddb1c87ac8140dd7df07baf4e3bda5f66d319b71c. 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/QZHNB2112411.