João Penca e Seus Miquinhos Amestrados (Portuguese for "João Penca [Banana-Bunch Joe] and His Tamed Apes"), commonly referred to as simply João Penca or J.P.M.A., were a Brazilian new wave band from R
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93493c4d537be40fe7c0107fb6d0d3269f023e08f309b2e31efa391307d27c42. 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/51ffe616-22a1-48bf-9450-25b985460a98.json and https://artists.proofprofile.net/proofs/artist/51ffe616-22a1-48bf-9450-25b985460a98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hot 20 - João Penca e Seus Miquinhos Amestrados
A Louca do Humaitá (Ring Around Your Neck)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18375ceb9509d0031bbd3a2382b497254ba036be6333260d1a2d860e589a22c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRBMG8800185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb9ec001d5cb450b3739850ccf34319bdff2ef197809783a4ac4abf374f4b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRBMG8800186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b31fc4e9fdf4afdb1294be08728a7dbff573b41cd07bcf28cd76424db01b870. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:39Z), 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/BRBMG8600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb90b861ec90d7c709d48aff8a813324bbc3b9cdd761d031cf96810458b078a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:38:09Z), 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/BRBMG8800187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfd1bca61b688ede2249da20f08efdda84184535512eb8aff8d5d78189bb518. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/BRBMG8800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda0bc8d341f60b9605f105e2ccf1047d48db9891d3260f42bc8e2f471a4ca59. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRBMG8600186.