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 0x602aefab7546a11e205e785611ee2b694bbb36328e32cafc24560addce8b2f11. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2acbe71b-e687-4b44-9abb-ec0f312731ca.json and https://artists.proofprofile.net/proofs/artist/2acbe71b-e687-4b44-9abb-ec0f312731ca.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 0x2a694f2c1a8f65f42ce5903db23d6e2d68bd79e472808b74ad54847fdecabe45. 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/USCGH1967170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaecbcaead4d4bacc3eeaed46082c3a6161f8a54b494b8dc30ea4b7d25b7f6b2. 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/USCGH1967171.
Jardins Proibidos Pt 2 (feat. Samira & Kátia Vanessa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e10fd713bb1af79d61c2227274cc5588e659a57978b42437e4f21ff863e05d3. 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/USCGH1967172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf344cf1a346672fa8af55a1748f821358ef5ac032f1473e4bc0809905fb0d58. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1967173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bee1237635730c1433409dea4ca32dee3501ff9629d0eab3b3481e3dc237876. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1967174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f1276640a40afcb03a013e73e38c51e51920ba519ef9aa2b622071987f33bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH1967175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d79b5635995ed951e93e27326f13c9ad58f1d81ebc5f0ebb2fa94637149733a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1967176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4eac48d4bb1e853416b6351b7e2d46cbd85a16994a0172bb83a9f6e91038e40. 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/USCGH1967177.
Até ao Fim (feat. Trez Agah & Master Bad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf7e76d8d2a4a3d6ebaac9ed1582a0800b1107d62bf70fe5114395c696a7f00. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USCGH1967178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f30a59f24d7a11aeaf15a628fd3d2b8ff8ad3e440408262a4cd6cae71a01ea. 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/USCGH1967179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf7274dc170f990b8a1e9b194c30996afbcaf95db9711b3736fa9fe3d643b0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCGH1967180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6dbc348d03e5f28af43aeacc6c72ee7ab7d6cead0f687dd8669b741cac9c1e. 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/USCGH1967181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1a600723b7925a68863db0730cd3ba4fc7f4b36dd57915e635d7a2452d398b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USCGH1967182.