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 0x47d830158ad0cc30d5cdd9cd05dbc2b9f85afc6eaea92803c612045f01eeff06. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0fc8aad-6720-4839-b12f-3b6f0ee840d6.json and https://artists.proofprofile.net/proofs/artist/d0fc8aad-6720-4839-b12f-3b6f0ee840d6.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 0x09beaccd66a1c56231ca048b8772997291dfba103b12c741ef3870b617019fa4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRUSA0402928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c94bbfaad27e6240da6f7ef08af8ce2ce9d8e84f6b8d052ccdc0fa11ede11a. 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/BRIMT0600271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c83e1ad3d4ff038e53ced3606adf0be2500536b3f60299816a22d3c27d03270. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRIMT0600273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d102623911d787e6e56c56b00f5fbe8a1b0bac40646fc16c9144858cba99b3a. 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/BRIMT0600275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a10f48d524bcdf9b91c336b8701881c5fc8ea59d8b09a2a34bfac09dd92ec6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRIMT0600277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4d39e382cb051e1ae478d67540afd4b496cc9552918d15f2593c8fb3c5161f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRIMT0600280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f7548593ffd3d2ae98ea46fb423d9c3c783afde71c75b45c5395043a0f782b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRIMT0600282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd332b6b8782c053e53e1a0c94bab1ddbc98084e18d04641e99853e43721d79f3. 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/BRUSA1700339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb6268b22cfcb2dd5944a7bfc49bf9fc898afd7b6a96c17b88bcf2fcfd79ec3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRUSA1700342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813c783503b5284c025455f5f9d09b28795b2467740a86a45c5dde124a7e3f18. 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/BRUSA1700343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375300cb5cd5442661fe0a814fc7dc8ee6b2b81b4d5a138c7404952f74d4b850. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/BRUSA8600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9d2b587fb89cb073989bbcf29634e59f949826c7f34cc07595c091009c9871. 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/BRUSA0700912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163c7e16c599a950f029d796bc3e826f9e259203158a440f7c25c7867ed40fb1. 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/BRUSA1700964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c9bce2dc7fc8e0c679746f8c4cd51754b7b66c7ecd78e066d76ed53c4c4653. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRUSA1700966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc5740e4054acbe0d7808cd6a7113580902d080b9048c2759a27ad27013b26. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRUSA0402540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66a73f0a2ecead0ec63300de7e56b819a89f106e10dad283993ae65f296149. 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/BRUSA0402768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a0bfbeedb704d61d9abaa0c0ecbe9e5ca3f85c7dfb636d8f0a823ac7dc668f. 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/BRUSA1700898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c01059b469924929a403ee9fcfa6d6660e5523b1f41a974082e3c27fbf24c8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRUSA0402426.
1ª Festival de Musica de São José dos Pinhares