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 0x548e562411fd0aa130f456f93a916f96c61525d730df608dbad1e2ab0980fcfb. 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/f0af99a2-80e8-4c43-8ddb-478a6508c938.json and https://artists.proofprofile.net/proofs/artist/f0af99a2-80e8-4c43-8ddb-478a6508c938.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 0xb0b6f6c61cce5cb360e5128dbfd2adbab660e92b5cfa0aaf8d71a74a03adc4c3. 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/BREMI7300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad18267b7f6610a752df364290e855a05d5d6fa516beb152852b841bfa00854. 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/BREMI6400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1623f70c586c95cb434edb3f3a00ce65dcb343f8a47cc9f53506a710b892214c. 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/BREMI9600097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad18267b7f6610a752df364290e855a05d5d6fa516beb152852b841bfa00854. 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/BREMI6400346.
Cheiro De Saudade - Original Bossa Nova Recordings
The Music of Brazil / Lúcio Alves / Serestas (1957)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da78ca61dc6d57592de2d9b27be7a67b3c8f3198f8236d53e66b75c052dd5c2. 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/USPR38605204.
Memórias Musicais: Sucessos de Lúcio Alves
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153f3e240ee4ca864e2b3f916018a6df40cb279577cd3907a5aa54910288bb54. 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/BREMI7800598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c60720d2ab5d990402fa4e6f30525c2378f71f81ac76e1accf2e5de4c56294. 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/BREMI7800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4844eda4afb915d4b509c9b961db458af647c09499e1da16c3921204df57cd34. 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/BRMCA6300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f26d8357a76d4502387638cfaaf6d49254cea25d539c31659bb3ae3fde6dee. 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/BRMCA6300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74adb181e10a3ea0a05b7df477ad68fa9cbc0f2b1e40339f826c6d48ebb80fa. 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/BRMCA0500648.
Lucio Alves Sua Voz Intima, Sua Bossa Nova, Interpretando Samba Em 3-D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc219edd10e1460bda8958e0a3e6e0b744fb763289300edf39b67e552d574f06. 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/BREMI5900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d99b941e0faa2b50fe4fa2d38928364648a952296eefb83db0806b84d1e665. 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/BREMI7500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8246e9cfe603b39a371096ad041aeb453af73837840eb8c83fe27c487e510e. 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/BREMI7800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895a0ec4c0d55b9305eaab438c7957ef5e0af34adcca7e54a1ccb95923aa3ff2. 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/GBBLY1002826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc421b8934c9138a20f9dcf17369b0261e008eed18df771feadc78a2f71923bc5. 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/BRVLS9400581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77bd98f34334547593d264ed1240fe59edc98a3988eeb717d9e11e1c08ae819. 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/BRPGD6400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc06c8b732ec3b0023b832084d5695acfa313cc42c8c3959d87d2ae4c78aa1c9. 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/FRZ336205170.
BD Music Presents: L'histoire de la bossa-nova, Vol. 2
Contra a Tristeza - Vintage Brazilian Music from the 50's