Elena Ledda (born 17 May 1959 in Selargius) is an Italian singer from Sardinia. Early life Born near Cagliari, Ledda pursued conservatory studies in oboe and voice. Career Her soprano voice was su
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 0x9fb86cf88cb5d65c01dff54ad9774a08802dfd3b656e70a360eaacd13cf04c6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/731e7f98-fbbf-4ed3-8c7a-fbae3595b12f.json and https://artists.proofprofile.net/proofs/artist/731e7f98-fbbf-4ed3-8c7a-fbae3595b12f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cfb56ad9b8c82c78dbc662b7d0037696e2797bad4a966603968ec6afd2a03f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ITNUF0481209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20958c39bd07b86b55d7f80ad7b2170ff0974b2881980e0d54f95fb2ffccbc9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITK601701464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db379c1e27066e45145d35826481743dd29d2b400e746be0ba7cd7883bf042c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITFA71600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab42b8c44b8819ff264867700016a7fce76f78cffddb2dbb5e2ea0dc15df6b3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITF701530802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96175d8372814b8c080e0b229037d434209d1152e70eff832dbe43c86b2ac692. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITF701530803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9668f32cc735c2144ebe7acfa20afba675e9b4e6c1376158b909f6d1bfa756. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITF701530804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b6356c70d268aff69ded86e351e009f3003b86877211d23d5bc2fb6cf759b8. 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/ITNUF1080504.
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
Cantano Andrea Parodi (Live at Anfiteatro Romano - Cagliari 21/09/2007)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c28c5f35dc26eb133b27c76b75fe3a7605f72991ee19ae707b8a2f19703e62. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ITK601000067.
Traditional & Contemporary Music from Italy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd783e70c3c8c43ca9070680b660a7f8c8901900991a6b738fec86053be5ce815. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEA690069090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910cb565a5db7c7a46146fba9c682124badbf1042660406ff5ea8703db1a3c51. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITF701530805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec3898e8558c8061dc355f76986dacd632e0d671f801d81db2906313e788a07. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ITF701530806.