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 0x79e8e0123867d57b77df1cf649678fd2cf2b65dc2eb140719b64c8f211984773. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fad9b5ad-7cb6-4da4-a2da-5c3b132d58cb.json and https://artists.proofprofile.net/proofs/artist/fad9b5ad-7cb6-4da4-a2da-5c3b132d58cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cultura Lira Paulistana / Luar do Sertão (Música Incidental)
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 0x9f460e1bc720097924e30e37afdbce87fae48c30da96dfa7b277503c361deb91. 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/BRAPI0300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba0a36ee6a9a2fdc8a195690ec4011fc480146aa4c998afc7678e8910e22a2e. 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/BRAPI0300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26697052f2dea7e9a8e99360473d1f26d5fc642dfc128b7b596bcdb051c0cfa. 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/BRAPI0300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0269ae91ae333f2e37b2b7be6f3182cbf15b907cf0af27cfa6a3669836cceb3c. 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/BRAPI0300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d871d99e39e58fcfbdb3040cf45ee8bb9294e91a0f706386115ac5cae24b6. 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/BRAPI0300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b78837c3bc830f0724cad5c49b96bc72fc27b51395713463142d7dc6d180e9b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRAPI0300392.
Vou de Vai-Vai / O Boi Vai Atrás (Música Incidental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8085ce96c1960cdcc9015937c1b1db4a7b496854fcebb5424f6345c11fed52ed. 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/BRAPI0300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066013808f80ea5e49ebe188a9119d076d02918b4d7b1bd42a2b987cde55eb8d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRAPI0300395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8b34d53f747463830a9c0f309c1b22c29eaa9243b69081cd54934217e7817. 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/BRAPI0300396.
Já Que Tem Que / Vapor Barato (Música Incidental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6251c9da5967f4e819fbba73ca0db7cb750df66156a2888ed006f82d62ffe1e. 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/BRAPI0300397.
Outras Capitais / Não Há Saídas (Poema Incidental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd880dd2781ffb9131a06f979c960452b2cd82454cbbaea47c5b0bb555dc87657. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRAPI0300398.
Mpb Brazil: Brazil, Samba, Bossa Nova And Beyond / A Nova Canção Brasileira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b68dba9a93aa00be5063794f40e2dabe511c8c6071f7057ad9a0d6921cbc47. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X1675240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7950ad3a4cb5972a286862037e053a1961b195ec64c736a89ec6148933df189. 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/BRUM70600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331689b698a5bd33b3fee5df186d98ccf0130450c83d5ce761d313fa20f72419. 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/BRUM70600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1367273f5b8b9921407f50cbc182ff31a163248f60bce786978bcd77a3f9bb1a. 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/BRUM70600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d860b39ee784b87626e26998f80ab3abebda874820201ff36ffe8f7eedec7a. 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/BRUM72100734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da39da2522ec841723ac85044e17d486ebdd72b841f439f030a7d9517c84ebd. 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/BRUM70800323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f51b33689439f6107c7b5a890babb5d68ca225acbec33658cacdb6d94a03510. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:22:11Z), 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/BRUM70600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5667510e5402615831a027175543f5bac991b1d8d18a3d7ca30a59cd79fe517. 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/BRUM70600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a915422ddd9c2bb62457f1638d636bbef9668f7dfc07adf79e181c883022398. 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/BRUM70600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b58d643c4ad1d2472955da128d18171eb21ba82957acffb116ef53c93c77b55. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRUM72100735.