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 0x2d901f5a94288b26c6a56df6580ce8106d56c4ccb306d97c8d175cfa9eb27d85. 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/6cd10eda-7145-46dc-b307-e63c35b396b8.json and https://artists.proofprofile.net/proofs/artist/6cd10eda-7145-46dc-b307-e63c35b396b8.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 0x54d7c50064ae9d40f4c090852f9a8a855cdf1edb2be0dcd2f898c301348852e4. 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/BC3PG2401205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac863bd0c4c3bcca6dfa942e10a9cb3ffc63c11032dd9db4ee2fa79e2dbe697. 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/QZNJX2483894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d69c508c4e1ac2f767d4c20d10d37cca67b1e490a11a8fa1734ecf0da9cd34. 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/BC71O2400102.
Eu Morro de Cachaça, Mas de Amor Eu Não Morro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942ef497cb29b6b72b7d102fc98c23b2fd8440959d51dc1a307b4af068c742cc. 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/QZZ662493328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122afb70bd5a713bc8ee28547722696cfd27930433a1b23d23a6b44c0166520a. 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/BC3PG2401207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8232f4291420650cfa9e5bb651c282962e999e9e1562060469e7b12d404a226b. 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/BC3PG2402347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabc179528e1bb46defdb7facac324a6ae080f66e7507d113e017dd65fd956bb. 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/BC3PG2402348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873f37d5ef10cb7e1a6a28055a875b11b6812c489bc3e9ad6cb02ff41c97333b. 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/BC3PG2402349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379556e908746861984b6924d0283ef4fcdd3355fa7a1cdc4e45f6158b2c7fd. 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/BC3PG2402350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8684115abe3ef79c59c0824d142e94ea14aed430289eec6cefe3b9683f9978c5. 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/BC3PG2402351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bae8252bac977bf63cd4d5f3c88c3b2d5af13fd61b233ed02f204daa68c2f72. 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/BC3PG2402352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab183248dfdf1eb438da29281e11afad30d92c6e00a058c63a697753ea923f. 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/BC3PG2402353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cd18b35ec370ef4c7586668311f7c8266fd88bdb0a156e5505e451b2232c51. 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/BC3PG2402354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaa7d5e966af77e9d530c21ab08fdc3ff4da9bf92f2e3dac70ead514ae493a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2406640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228729ca2de84fe3ca8890504a07f42463d7e1febdf2e5c5ec243a07435921e8. 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/FRX452120237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fefe3732d4b2a34520f092f778fe2f8e5814dc44a8a0db452d26bbbd151177. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BCIH82201295.