Ahmed Piro (; 1932 – 15 May 2024) was a Moroccan singer of Andalusi classical music. Biography Born in Rabat in 1932, Piro's family was of Morisco origin. He studied the Quran during his childhood an
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 0x6aac4ea7b05538919d9f7edb9233f490de50b193bc5bf97ba52d41d4fb087f52. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49501e24-926e-42a5-b37b-f608e881c75c.json and https://artists.proofprofile.net/proofs/artist/49501e24-926e-42a5-b37b-f608e881c75c.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 0x9bcd53c1085a333c2f4f52d660e53ee766803c3e7e80a7232089ab2f0ed49bdb. 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/FR10S1738106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5985abfc86ede45f4ae3737d30d7b440b897fa9b215eb358e773c4e1a6e1a12e. 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/FR10S1738107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc26b1e36562b6ad69462fd7df91a1bdeb751a3c307d6b872b935fb882928054. 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/FR10S1738108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d870ccf84b0f4259499cf665dc7132a9db0c11ec35b4c55de762240ea28cdc. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/FR10S1738109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f99c11ba6f728051453fd4f514722027d2b3bcb41e52591057df32d2bfad82. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR10S1738110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5ee0108ccca86dfa3e3383c643a0713fedb95300321a07ff865f9cadd0e148. 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/FR10S1738111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beb2ad141a936f69d1586789373377bac812f7b5c239c15c1f013c5c38eadb1. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FR10S1738112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a41035ff4665fbb300d282a2ffc470cffeb1bec0f0667ec989fbbc56ef034. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR10S1738113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170deea3029a0e9834870e9c0c914a23271ee5c8f6abd6e85f0428eb614a4e1f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR10S1738114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae27ceea6b2616be500c02aa47254278d007b29f3db3b505475f76706120596. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR10S1738115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76312c0edefb435251781b9d0c3b5b9ea7896cdb508907bbfb02331f48b739ad. 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/FR10S1738116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e562c29b73bab5029d88368b3285346bb84943aaa8c34f988f2c305aacb1d6. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR10S1738117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d730fc05278df6f20ea494a2ed5c215145d4dd794b04ab6875581600be1c09. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/FR10S1738118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b4c2944ee16cb803e38b9972ece0877cae990ce4f3800747974d291c059d42. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR10S1738119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ea4be31f7a67337b9bcbc316f2b6ba7b72a636a9f4d4c92aa5d947c479745f. 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/FR10S1738120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1b47cc41e2dca58484911ec89ecd86572a8589f0d7f4f53962614ad54971a5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR10S1738121.