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 0x7fd970fefb9df7798454e3472c5667dd6c25c30d6be7b2db196db0b52c2ddbec. 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/821f995b-7593-4cd4-85ac-9254615c00b8.json and https://artists.proofprofile.net/proofs/artist/821f995b-7593-4cd4-85ac-9254615c00b8.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 0xc1681a78e2e2077bd838f998e89f8b4e9bdd82cddca27258fceb2152125ef994. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BRTPA0200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7c47f36f670b71ea38b503ccd5a5f0c552b9d28ca4f364b30ca50a056f5978. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BRTPA0200275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f4f9c0b084571a4960fb8be3355f46bb3937b9af8820b6d4d1b1da5800aa63. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BRTPA0200278.
Caju e Castanha ao Vivo no Centro de Tradições Nordestinas, Sp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f772cdfebfe6bef02238ca65612b94a51a364d3aa52579b835605006209f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1630914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377e0a4682382b6d152250657e1c9245e234e33b10b799a9f6f1ae3e4e73e0f. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZ5AB1630917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937c1cc818a5c4d7009b45eaa01b17b788ed5e063cdca6272c8f16d63aab1a91. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRTPA0700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed0c2fa990e682337dc72a30f670496da4fdb031b26d774a9a7527200b0b2b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRTPA0700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa0a19ede16df8a2c792f358e18cc37b3a0fd0912b47b4a48c33ce588a6a7e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRNYC0800827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c33040f3721b21454361ba36903b6b40e5b44bb3854bfa50a3932396ca93f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/BRNYC0800831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd847faa434ec1ca951958902f47c1cbff7c3906bd5fc5e03c5ad7010fed487c3. 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/BRNYC0900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de1bcdda11a56266ae6f1b51b59210e8102e12b711d069a5832d57cb5b3e662. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BR2PD0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f791f025eb96907395c641585c889ebfbb89c74b22e1e98ea0acff17b31260. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/BR2PD0900005.
A Mulher Humilde e a Mulher Interesseira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b3d46e6e68183fcbb884adbdeb1715148116b5d2fbec6cff315dda8896607. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BR2PD0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344de92d2d33d9ddf27f1faae8bbdd9819fc4d1d0200ebc2fb058f1477f3bfac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRPOY1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0c768bb97c48b2b8aa1b0904cf0058f878491bfc753897a0439aac5228301. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRPOY1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9068cccf48e99d9ef090a229399e509669794ab7e51a73c0804953840b5474. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:09Z), 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/BRPOY1200007.
As Moças de Antigamete e as Moças de Hoje em Dia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b6d13e850ccef063d02de64d09fe31efdc9018758513dd4f39513c581e6fb1. 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/BRPOY1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab48798654bfac443ad4537843891c37c42a4c6b66626a76cf7fdbf5fe9836bd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/BRNYC1600156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c2eb6adbfcdf6186ae619f640cb57247dfaeecb1218d3ebe6d0595c4735e77. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:52:00Z), 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/BRNYC1600164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150b0ab93b8694a6de72a6b18b8c0204d26c5faca027a4cd4357dc6fd67b3a42. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHZ31922924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef68190a2f98dd7a4d40ccafea688c14c93b7dcee36aa848e179be071341401. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ31922934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a336ce805abd4c56369bccd441296d85b59000d19593db6990587f31ed7258c. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/BCPX22200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02372874f78ee27743b6658341c04330304f50085bb74ca82fd0148af0ab0587. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTVM2422645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2178602d223bc58cb97a31d741472acfd7376ba51f39a8cd9376380da2aa7c0e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTVM2422656.
Caju & Castanha Futebol Clube - A Peleja do Fla X Flu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40879323a65e2f8d98057c7511455003a41d6de5154d4ebd1c559b6a3d7f420. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/BCP2X2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b537111c0df5f6fde64c2cee449ad40bb14d13099e7730190cda9f87bcb0a16. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BCP2X2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf16b1a9cb916eb0e16176a1ad061f60334d8053da47ae171247904a4cf070d9. 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/BCP2X2400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7335874c163ad73643627f226f5f352e55d8cf0acf3d33f38add623376cd1de3. 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/BCP2X2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60efd8e402179676e50df2317d8f414310677d59060035d1c42f383d913c8fb0. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/BCP2X2500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4200be0fba3d9e07e112b0b07e67450b9f471cb6cc3849e7add1ffadb7b800. 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/BRL1P2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb76365dad4a45661622c5593934d07f81b7837c6e63dae8ca950308602ba026. 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/BXFAS1600002.