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 0x73ab96d8156331127a4b3f64cdce483ad0d89296d83918a603763ca6ede5825d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f5326e7-28a7-4c55-a186-c17977cab8ce.json and https://artists.proofprofile.net/proofs/artist/3f5326e7-28a7-4c55-a186-c17977cab8ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brasileirinhos - Música para Os Bichos do Brasil
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 0x6f7753558f6e76e0f0327969b18857785ad3cb0a2ec0e2dc417eecf4cf74a5f2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BRPI00900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0f6e50b12c6caaa1415baa8f65e83ed7bb7a7f31169ef8e07cd501da1677cd. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/BRPI00900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccdffbc68c9de9029e73d06317317513bb9a50c3973c24821ebbcb83c640c13. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BRPI00900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8662839438e0bbb5d6ebdacaef30af2cf682bfef8f0ab4f70cd9025b7e1d14. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRPI00900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5aed66824852078dc3b13a69c98c71fb71fbe82ddf50375a6dfdbf70a4b4e9. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/BRPI00900011.
Brasileirinhos - Vol. 2 - Música para Os Bichos do Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4078703d13d9a48e2917b33238fd157c5589414f987b1d5ae34c56936244a72d. 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/BRPI01300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5e0f675ade833944d6d2408c66d13f4d9f77ea4d92e7c7f3f4854a9f09826b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRPI01300002.
Pica-Pau-Rei (feat. Kennya Macedo, Mario Manga)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c430b249f70a95836e196513d50db77fe3670d2ebca524f2a77f09548a3bd22. 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/BRPI01300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78116eeadf055f0146bd4dd9c4ccd56fb86b4b80e1072caf6974af80b7a7b3bc. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BRPI01300004.
Tamanduá-Mirim (feat. Paulo Freire, Simone Julian, Tata Fernandes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8089da3f4f39380fef397db361b465881c75a49d85cf4c6e20c8d0611c251a20. 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/BRPI01300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78621f774f9511c698ada22e745de46b6c3412c2ab8cd7a25e559795d092bf9. 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/BRPI01300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab93dc113a53c019d029eda77badc2e851a6e9583b5deb3c8e00b2c5fd2b13. 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/BRPI01300007.
Uacari (feat. Mauricio Pereira, Sandro Moreno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ef9697e4e3abaae1bc55849dea9dc99dd4b0685541a085d83cbeeace52f055. 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/BRPI01300008.
Cuxiú-de-Nariz-Branco (feat. Marco Mattoli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85467d7d4e69f2fb41ca244f0e8363a87c18df4b3d7eff5224ad8e6534eda1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRPI01300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c59909439ffe6da81e16f267e471662380ea066cecae15c093a16ec30bede. 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/BRPI01300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c9c1947ff8c385815e02ab89f1ef61347584e5833332fdfd8c6e3c1ae42b8e. 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/BRPI01300013.
Periquitambóia (feat. Lé Zurawski, Marco Camarano, Paula Zurawski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bf5c167c2e7c5c54269f534fafd5bd186c932c9b8112435a5d8e189f9a0696. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRPI01300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3deb4ffd744e83c838b451e4167b95c4f43afeffdfca31c1fc692a8488c6f4. 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/BRPI01300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee243cc1b70df8ca94b552b10cf3580d38c1c10f310cc853bda2c0709113d5d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BRPI01300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63b6c9c1b0a0ed5f33a697ea9fcc080af4463953cb9ae30c86cbdc70ccd8412. 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/BR93E1200010.