Samba () is a broad term for many of the rhythms that compose the better known Brazilian music genres that originated in the Afro-Brazilian communities of Bahia in the late 19th century and early 20th
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 0xf46c3be35267606e754d9a330069a4a398487d9ee1f2ffa96835ba5056fef94e. 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/10d2f5a2-cbd6-4e37-8a03-7bd662589eb2.json and https://artists.proofprofile.net/proofs/artist/10d2f5a2-cbd6-4e37-8a03-7bd662589eb2.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 0x4331d0f238d77e010bdae3c91848a47831b2ba687b6d0a11ff9aae90741b2fcf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKAAG1500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f515a175a4c650628ac70987c65346d27aa077fdd25247c347885df09558ec. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEU160600665.
Samba do Brasil (50 morceaux de pure samba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa2054a33322e69b19f5e2631be96b05423dcae41d4ec4119c34927a2f9a189. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBBFT0800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd1f44bef999cfe9c651c2dd4c3d057f354b7eb3393c2242ad7bb0ddda76dd2. 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/FR0W61472585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd49a192058be975833c8acc7b9af24eedd670f28f110a24afc633da20c41e9d. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/FR0W61472586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9f6b379a49fd51430e944360145d1fe4c9d1b4a966a4dfec6d34e9b4aad68. 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/FR0W61472587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce344cfe41869531761e0b74429b45fc26a7f348d3ebda9a05d73fe0bfafd36. 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/FR0W61472588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e39591dea8e03b9e82e8a8fdf2f2236cccd7a0fd5e35b75515d11ab9654f973. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR0W61472589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8165a16f6dd138858ed5482dc2a80df3a857b083000cdb025c4d11c73b722936. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR0W61472590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd711401ef37b06a20a0cc7ed54a80198bd69137c3e1e6728982cef1aa493ad80. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR0W61472591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5974ee06c05c28fa668ed493c72017fe9e0906a13ced94741f9299b3ab295a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR0W61472592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc936a1d1dc37f87e2ae838c4a500d1e76a3df40529cdebeb81990f69250a3de. 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/GBBFT0800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c04a90f76891348c2dc501a150cc117168ee07cf22f4e3892f868c9ab1aea0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBBFT0800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83dc03b85071869fa79bbe36e2dd1bff4acb8bdef1cbe825d7dfb984ac2cd0e. 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/FR0W61472595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5350f1227282668d116f455d9b36df7082eef388bbbec373386623fdc973a677. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITR551315610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd205a565e9782ee1e081b77f36868a30f124c6dd7cad2652df0b31ff786f602e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBBFT0800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1363393854b498c5fb00fece8e16b54d0f8c5974d0e79f082efcb7daa0f659c6. 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/FR0W61472598.