Sardi or SARDI may refer to: People Armando Sardi (born 1940), Italian former sprinter Carlos Holguín Sardi (born 1940), Colombian politician Giuseppe Sardi, Baroque Italian architect, active in
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 0xa741d73af5ff7e33d0f8219be517bdc944c6a9d2128c2e38d0001a86c37dcd1e. 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/17884b8a-0054-4f58-967f-6afe239ae579.json and https://artists.proofprofile.net/proofs/artist/17884b8a-0054-4f58-967f-6afe239ae579.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 0x0082428c832fb04a0779a5943aa7cde28f1db6b3f798eae382c4d1513155fc8f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEL1974917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0a3da15e7b1e386f3fc14f816c041b30dd8d9debac904d655ab1e05f282b60. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AMA032000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0634e9db8362fafb481d6c77269342dfd1c61b04e4310364f07cd560fa1b77e4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRX202177708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc96a4999c698d12d316ab45edee6184c84d59f22e14128424b065089cbc8a53. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZP3W2152006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bc15314dcffaf232d3aa6366d9ae4c49ce75d80dde6405357521bc25ce3fb9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZP3W2152612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f08c67d4c6f89c82893cbff0df7ef8dbeb2c164fa3ed2cf0f5b40669efed7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZP3W2200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c75c24bc3f7dc979c664d65830f9a115b67f71f5aa25b78452a730b56761cc9. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZP3W2200649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca6ac1a221d24ad9a7308ad2e6096931d8ef7043966a6a89dcf61b494649708. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZP3W2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89005e3bf8af50214e573c9bdec35cc39e6a02d68be7ef0f46fe03568f2b118. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZP3W2300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacfb170ea76618bffcc7f923211578c60c083989febb734f258e6a6b2397fa5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZAKB2406442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfda83f3721b6d3725a19d0d833eb29cf7174fbecde7f7d12dc8c32fc25364a. 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/QZP3W2400998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de807296d566432d6d9ecb58348c5b0a4de183016a888b15cfa254b9abad194. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZP3W2400999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506fee09a7399f9f7e3a43f03f3c1e91ca549259e48e7e0c14592d6819f3edc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZP3W2401000.