Antônio José Santana Martins (born 11 October 1936), known professionally as Tom Zé (), born in Irará, Bahia, is a Brazilian singer-songwriter, multi-instrumentalist, and composer who was influential
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 0x8b8345566ef660767b6ff26fc514cc28214bdfe292cd905235ad06e59a9c8dd3. 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/6b77f27b-85a3-4cde-a2c0-9fe98964b3a6.json and https://artists.proofprofile.net/proofs/artist/6b77f27b-85a3-4cde-a2c0-9fe98964b3a6.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 0x9d529c9d8e4e6a681c79665f46d69e8756cf9ba72a3f8ab52f7bfb6de16df9a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLB10210559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd27fd128a698fd13b46739bf6331d9f0e11dba7a26ca269c220a65cf4570660. 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/BXSVC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d2e2ce8d99d3eb13f2f282aa5328a43233efc7eec5a0ae0ea2a11075b151e4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:42Z), 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/BXSVC2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c4e1c75f6bcadcd8f6ccdb1173b80c9e2ba1c1af85717e5eb2c2e98ea41dc8. 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/BXSVC2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e46a450e439844453702cf545039295e970145e543aba333b391f8446244d5a. 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/BXSVC2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86594d6626d61e76560205271af36b7514c81e81c875e42aef73f666765a74f. 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/BXSVC2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbfb0c7c33c8791a24f4d48a954591927b7a0e1c7de83e06ef25f5719cb1b52. 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/BXSVC2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544cf968f7a517b329d1542ae817ef1e871311618b863286dc73a4d55b9ae7fc. 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/BXSVC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda9d2dabb7b2079967e9e75c8e82f7f5c6a73f5f487eb50bb7ed3605346d8dc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/BXSVC2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06388f2552b0d15e0b9084f4d948be59e1626c9ba21f4d1cf321b9903f943b75. 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/BXSVC2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f47cbd5eb4c75356bd1f97e279c8f86917bc40d6f32b7998afd6f396828e42c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXSVC2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff8dd9d30f7e6524dcbcbf939292486c5f77cf59e91291f30fdbadbe1a7928c. 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/BRM9U1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef12efddef7d0427ba33bd730106c113d76e3d2d12e573d3a650490e9533775e. 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/UK7771409408.