thumb|Image of Mario Zan Mario Giovanni Zandomeneghi (Roncade, October 9, 1920 — São Paulo, November 9, 2006), known as Mario Zan, was an Italian accordionist based in Brazil, famous for composing th
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 0x00fa58067d6d05234ad5a61031db6d64b6b345bd1eb975069afa355f1a6974e5. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f79f03a0-c45b-4062-b4f5-23dd5c8e359a.json and https://artists.proofprofile.net/proofs/artist/f79f03a0-c45b-4062-b4f5-23dd5c8e359a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sucessos de Mario Zan Bandinha e Coro: Festas Juninas
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 0xeee070f584e227c6f4b0d0c8eaa82cde3c44f20972c4c5a775cd055b80b73cd8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BRBGC0500246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7622a870e85fcf2e766a76c2e640651fb24796b4aeff9704d3cf2d1527360d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRBGC0500259.
Feijão Queimado / Festa na Roça / Festa / Assanhadinha / Dona Candinha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db4f0ff84a85e9c641cd65286f38385f2562bb2feba99f329af30879e95d702. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BRBGC0500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280a45161ae2737003d56e8463c44ea4b3501e3fa74553663d3d68bd78e28e61. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BRBGC0500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52102dd747e505d20eb1c396d7a07fa921de406417aa48bee6d296ebb2931691. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/BRBMG5700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568a9fbf39fe96a0d7a6e015527ea54fcb400653a0d8a866a6c35a55aebfcba. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/BRBMG1700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa1bed7e56022ca8fe8bd0898293a2c379112e4b34bbe9d02ad284c1c5a064c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BRBMG1700056.
Festa Junina: Mario Zan Sua Banda e Coro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d59cc396d64df7cab0318354715f0b172c752a1ee2d041f7c6b5177c4c8ca9. 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/BRLSR0401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f864460fcab5c7986cfcad5705e81c5ca7b9ea0e84d523dcd26e8c9c255314. 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/BRLSR0401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba2b1f0d9093d3ef330089287883383d370af4841043c1bf29cdbe052990f7a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRLSR0401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe913eb16b5e6be35298d73ade404d685b4b9a6dd5f8aee6086cf07392dc0f062. 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/BRLSR0401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c58d6a23cb153cdd18043d1837ce2e4dc368cbaf6f0dac07ff50982decf314. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRLSR0401413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6f15a89cf19aaa0273116f68a2aa6bc8a580ef1ed041be1a37888e3ae6f2cf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRLSR0401417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e3fdd29632d98d17a13f5f27f759e574c8fd896959d7ce9d18f0a878a21b23. 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/BRBMG5100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168e2827735c7326c0f930fb45ab5b093b5b9f7c8bf22260a2a432815af9f676. 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/BRBMG5400023.