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 0x41f1e5cfee79b1c9bba7ceb502c5b8c98c7db752e7acedbe9c750dc858a04ad8. 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/aa67a6cf-9ff5-4737-8eb9-4716ab9064aa.json and https://artists.proofprofile.net/proofs/artist/aa67a6cf-9ff5-4737-8eb9-4716ab9064aa.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 0x38ab2453013bebbb98a8f37e825cd45ef2e0f8c8e8607aac7ca450ace87e1442. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BRGC40500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4245e503b3f076667190efcd798e6349ecc27323f893faa84e0f72989bfd31de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRM871000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d7430bc4953a0037be42b0bbab7a68419136429da17d893d79889b2c80b14f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BRGC41500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14d5263be38f5f991b8fcc9226e3d3eb8c0100809383dfac791b52515eeb7cb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BRGC41500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aae8ae780049dc61e1eeb9c9c158bb16a28e69f7afeaf77b0814465580d39b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/BRGC41500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf1e41466086c6c0136b8c9e8e9bb616b748022b64749fada16fcfc3d5488c9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BRGC41500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f19647753c604745a8d2bcefe92c13f5c6a168d4a9d78b895e7156f1dc88223. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRGC42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a6c9f625a27aa69341668da11bcb79398d43c8b593b822f3a41fce64071af. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/BRGC42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf262d22764d7dda209d71eb55b8e435aec73a3fe55d98c833c648669ced64108. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BRGC42100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e56798c94898630e56ce212d59ee7c4cc5850d0c45c03b28b03199816dfd1f8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/BRGC42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825ec716753f083629759f2be33dde5b0a426d48234b0e65701b1bcccd3b344. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BRGC42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc53cc9e92edab84fbec075ca3d1aef74c7c6b95e301dfcb314e5a20efbf88b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ5AB2406514.
Glaucia Nasser Canta: João Pernambuco (Coração do Violão) [Ao Vivo]