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 0x218eef01144566291c6c775e8c7f50dcd8425336b7c851ca6e179ac59a8ceed1. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7c9d130-5519-45a5-bdeb-77329f3c1ed9.json and https://artists.proofprofile.net/proofs/artist/b7c9d130-5519-45a5-bdeb-77329f3c1ed9.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 0xe30bfdcc7f464df692711bec407a54cd626048b9c9d486d3d239bd38da14bee5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SE6A92347809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb35189fe0404ba1dfb2327883f593d599ba290321790f594e05ac3802d27f5. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/SE6XY2366094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eda5ae73f861989a6b7a03e8c61a91eff8eaa29ccdd9b34e702ca2563f5bf9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE62M2367173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5e52e48b40a6266f3668a84680def3526b016d2e36fd88b5584657e77e1362. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6HN2499587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5d9da6805f2ca854c5b09b1a0716b077ebf3a96a196d769d8fbe375b197230. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SE6I32407310.
Dormir com os Macakitos: Ruído Branco, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d489b845913504bffcc7e06cb061fa0ee06607f20314764e04d6bb62bacc093. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE6SA2460861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7426ce6c4529f9ce83a439b2e1d5ff12d15057dc73e012ee72231d038f4d85c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6SA2460862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85bbeebfa4efa6c165fe81c8d23374f67ecf4a03d0f6025c483500c09bab70b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/SE6SA2460863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4c54846a84aaaa47351b26002405c2a471f978b82fe519abb6375997d241e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6SA2460864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18ddbd4a91636603e3b2adc074a5ba4cb043ad3cfc3c2e65a3875440459612. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6SA2460865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92f9987715b2d29b42364735b58d49fe2c3ad6e8d6fc5accd214f2c8f71a1db. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SE6SA2460867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb810b09a57cda5b9dfd1bce387655b3ed09cdd57a3fb12ffc2ae9546d9f494f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/SE6SA2460868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca63815cc0ab1e875a22f8f0146996f9cc9dd4c7301b17d51fb164e318c0cb3. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/SE6SA2460869.
Pedro, Tiago, João no Barquinho (Som de Chuva)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe964fb49f6daad144e564848fa7536b506631e338c0d2cd8b1a9827e7fc4443f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SE6SA2460870.
Aventura Começou (Instrumental Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ca0926e03d9337c374176c578bf82cdfe8be27e3f22ae53480838a78725805. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SE5BU2515755.