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 0x88f3b300df81998a3926dad5fc3b2ec2806e3f79fd2dc2a62402699955bc2483. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/771cfadd-bffb-4a9a-a4ca-ed4b8f9969bd.json and https://artists.proofprofile.net/proofs/artist/771cfadd-bffb-4a9a-a4ca-ed4b8f9969bd.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 0x82018f746900db8b79c6155e1128aff16c00bdb78025706d1abb0d00513315ae. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHZ62181648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d638c02e2ff86782732e71588990d09b4b53e3a69000d3d837511f180819e1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHZ62181651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f886bda516acda9f97dbd54f277da9f4763a6e01b40047cb823c0559061044. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZHZ62181652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3708ab71693fda2b746451f7c2ffa99788dfaa7bfc02bccdc855eeec766fa33a. 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/QZHZ62181653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa776108a44951a00687eb66678fb8233ef23fa5bcf3e6ff59622132e22ccc22c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ62181654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e9d34f701931b74f765aeadad1033700b7fc7c15c338dbb4a897a881200df. 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/ESA112559442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9ce9c2a83051c597776c7846faca725fbff3af5a0326f141ee9ceccc6b1a8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHZ42132450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04514b57230d5dfbc7d2d88a557369247ad66feaacf069bf7c5ceaff41e72afd. 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/QZHZ42132451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b75115ed32b9f3abe90733158701e21b6ee8f2adc5f5c31a3965d92c21d18f. 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/QZHZ42132452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859ad875632d64608145123b0196312acb2adec68d91ce313fed92643ec03c4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHZ42132453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec2f37957c3e3be2f7fb143c64070448018d27ba44f891b2969431c6ab4c056. 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/QZHZ42132454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447ded0e55c164e9ddb7c122692717e8aefbded1b9255ca4f5d6757aebcaa7d5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHZ42132455.
Comme une partie de nous même (feat. Badsam) [Baz Sound Bass Studio]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7b40adda4b203d59689bff2492b9f81bbde717af1ae92f3a33d06e8c51ffe0. 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/BRPK11300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d4d276281e20cfbd0d77fad7ae95bfc57782efa26b6c866877b0ef03be3fa. 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/BRPK11300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90278996294c278fb9b718a751b5d5277283d7900a2281724413e0bb86c869b3. 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/BRPK11300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b811bb94e998796da806ab4f679aea5b5c4be2ff5330fc20d7a702f1ddd3c4. 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/BRPK11300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578d1e0d3aab7b3ea43b6211c5f04bd28c101f77666d3c36a281a1190891b0a5. 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/BRPK11300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41327aed93a43f36c89828f7cb5b1feb98aa3d0c8e310478f5e02f2e5c1adabb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRPK11300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d43a98e539355b2a851744d71a0a2191407e5a9007eb5e080ffa06819d34d8. 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/BRPK11300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a01a82cc39c1918edd6788494968fbaa9407ee98555e458b4e899112d2ac100. 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/BRPK11300072.
Megafunk: Já Que Ta na Moda no Baile do Antares (150 Bpm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd6d24bbd8a901e7380f1ea15458c8519d6066b3b7d838a252699dbdfc92e34. 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/BRPK11800014.
Retão Sujão Roubadão Todo Foda-Se (150 Bpm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71c2a5a596e49bca15e6e680edd198721e12c49ab0001577aaf8454090e91d1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRPK11800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9bfb17567b77f7e4f1eefa214d1d288f54c3a0c8f01a0949eb4215146ec659. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRPK11800018.
O Tamanho da Minha Pica Deixou a Novinha Louca (150 Bpm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586793fbd8463983a943d480d1d10d290b4160aa1e3de00194462d61cf812742. 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/BRPK11800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14247229a50564780c10b7e33e366d87a2e364890f7b8ed411d3a3694e0ba714. 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/BCX6W2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55049f77428ce186d04f2a2f401f85beb1822aa1818ec058bb7299bf689eb91. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZW9L2484923.