Mala Punica is an early music ensemble led by Pedro Memelsdorff.Lute Society of America Quarterly - Volumes 33-34 - Page 61 1998 In addition he performs with other groups specializing in many other er
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 0x7751c96aa41bddd753a26eef00c72efa78812bf27066f56a95dd1d852e245587. 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/6e76cda5-1b9e-4e6c-827e-1bd2c7f3bc25.json and https://artists.proofprofile.net/proofs/artist/6e76cda5-1b9e-4e6c-827e-1bd2c7f3bc25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
D’Amor ragionando: Ballate neostilnoviste in Italia 1380-1415
Vertù contra furore, Musical Languages in Late Medieval Italy, 1380-1420
Gothic Italy: Johannes Ciconia, Matteo da Perugia, Zaccara da Teramo
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 0x52dd4882a4aad059cc0f6a4201fe347e1e44aa0d0076890c80267951bbb3c0fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ149926010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3bfe687158688fdf61ea39db904bc13e5c6ef6ed64d595700f40a18530a81e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRZ149926020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d01bc93da711004f7473962c63ff504c59b33e133428757784f7424edf2316f. 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/FRZ149926030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ac0b79bf89df61b307b49f274e8e300e39c1603459e1f541aaa7b9f3bd30c6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRZ149926050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb18fd3d0b0da58b4714bc01b090c22f3c1d0107f85ebbb971c7c2406fefac02. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRZ149926070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa102ed663d87ac4ef7cf271e83e71c38fcfcd23132a23068db617dd6edd31d. 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/FRZ149926080.