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 0xafc7f7a0aad16421647d981ba3d3042d70f4b09eb70392aaf0592edcdffbe22b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/437ea7ee-675f-4784-96aa-d6be1363a921.json and https://artists.proofprofile.net/proofs/artist/437ea7ee-675f-4784-96aa-d6be1363a921.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 0x509e7c567712642184af16687c47e66ec3b11c68314be566bb61329477236ba1. 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/GBURZ1000191.
Contra a Tristeza - Vintage Brazilian Music from the 50's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70bd7a9f06456d32207eda3261b6b3df66ce0d68c4544e3ec3427bb2399247. 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/NLHR52124140.
Coleção Ouça, Toque E Cante - Bossa Nova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68aedf6fcccfc5d33e91279bf43098005180d2ad776f9ca780ba4f656dd45a4. 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/DELM41201417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b26a4e9328accaa3ccde0fa4dad8483307513a7d3041986e840bac900fa87ee. 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/BXMPD1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6583bb831b35dde53296832e34b9c6843244eec262a8dc2f86e8aa6d72dfa07. 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/BXMPD1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbc8fb1ca2f241f25f77c46a7b5b25a8a22898a7776f23e645d4c2a92e44103. 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/BXMPD1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a761cbc6126affcc46bb96d824eef0ca779f3099562025966274578a394d7. 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/BXMPD1900050.
The Music of Brazil / Roberto Paiva & Francisco Egydio / Polemica (1956)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8b1275a717491f580911d0f5556da1e43cc5870083a604d382f2098a8f280c. 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/BREMI5600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc53c536010cbba35c946042e7519fc0b57c0ff781c575046ae735288a4613e1. 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/BREMI5600082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20abb015fd6366188116d0d006d13d204dee73c1374412d5a128889cb2e5e250. 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/BREMI5600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e379adb098fc7c1ce4425202e88262495f0dd11b828829ecc1af14d39bfd6f. 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/BREMI6400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a14c150a2824197d2d3ceb446ec9be431fa0768fefc4f829a6e2073ed9d7900. 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/BREMI5600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7e3530bd1d2a9830f83b23b948d9d439be2d7079e54b033e58950361adb032. 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/BREMI5600085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83323cf71a9b6cc53eb083ed4606b01a9a50b186463a9c0d8c45ebf8aa304b74. 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/BREMI5600086.
Brazilian Rare Groove: Rare Funky Songs From Brazil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716cb4216e19c45ab6f579bc22993a8c9474f5127211aeb66b6a7a27712e21f7. 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/GBCLQ9900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831e32db4e316499a2cb5f3f70949e431742fdccce13bd4832860eb362b53f21. 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/GBCLQ1700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85113b9995e19a9c05ef0b8f01e7285f87fd41db22e9e46c7e06ae8bdc23b72e. 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/GBCLQ1403457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ab166ee6b14e64b9feb837bfc18584126b0564bc4e478e63cf7a1de7efe586. 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/BRRGE8300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4bd32ae40ea859da419f34a6d13ebd56d8b091f2afae7aa6414562c22a7f63. 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/BRSGL6900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5791d534dd9f7406496a859fcebc9139cc78631ae40d805147a23aa79d438d. 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/FR10S2030050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e579ad57b2edf2d29162579bfc6080a2158e36018578a3c9d1514e764f422f. 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/FR6F31928440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30086b8c0dccd044f70be5ce522531a436dcbb938e1eb1379a8242dc99f3d7. 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/GBCLQ9900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f517d56f937a49876f4c316d02a44b0ba7d35b68dd79096600546b4a60151c. 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/FR6F31928450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceae2e33ee2958b03ed179375de40988aae0435672438f4324cb4591272427df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCLQ0601135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51ddd9ac4eb109a017c65881f713d89e511a69e708cb3443ecb0d3c18a562ca. 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/GBCLQ1402196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb078fb74a9dd372a047b92de867617daa974ef6d9abdffb79efa5a563d3559a. 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/BRSGL8300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2ee6b19d1ad8e59b829b6e5f8c5a4d99c964a305c9afa5ba6ac0b228425392. 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/GBCLQ1600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdaddcd25b1940ce703323fcad367959603be4dc2bb9cda4790816ef3ade4a4. 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/BRSGL8300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea22c5203aa39332b40ad40d62bc95dea8afe610ee629d8a198e12f55bafb592. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:37Z), 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/FR6F31928460.
Tenha Fé, Pois Amanhã um Lindo Dia Vai Nascer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841046f06d67cd3e9f8a7f8b0a9ae73747726d51ddd336d3263fdec93b73a123. 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/GBCLQ1501768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5427ef5d0e603a54ebc21fd90455eadf08c96e60ca5c80544195c97544e8d057. 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/BRWMB0700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7f3389609242a55d0ddae061479cd2cca8a2668d81975660dccd554fc97e60. 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/GBCLQ2000043.
Bis Bossa Nova - Um Banquinho E Um Violão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843e45eb4fdb31477df7e2385b1669d897b964b2a9b078a0dce8999655ecb03b. 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/ITA580403438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d70a99ebc44eca2a4fa4099a1ab652999efb2a59a7b88eb4eb65fd4a476b7. 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/ITA580403457.
The Girl from Ipanema (Music for Every Mood)
Roots of Bossa Nova 1948-1957 (Les précurseurs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0013bcc810c569b02ff099fb0465f4cfdfaa28461ab2b12d25cc8ab7e16594a. 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/FRX190803443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4699cc906ed61adc3483df313b222722539696fcc127e754306bf22f105f7c. 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/FR10S1495202.
Carnaval Brésilien - Brazilian Carnival 1930-1956
Os Grandes Sucessos dos Velhos Carnavais
Antonio Carlos Jobim: The Girl from Ipanema and Greatest Hits (Remastered)
The Music of Brazil / Orfeu da Conceicao (!956)