Costi may refer to: a Romanian village, part of Vânători, Galați commune People Cozi Costi, British musician Giandomenico Costi (born 1969), Italian football player Konstantinos "Costis" Stephanopo
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 0xcc501af9d2cbef06d4944498b572dc380231921dc7f4ec5ca6f3cb6651c05dc9. 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/55d902db-e64d-4b7c-b435-ad8f467df539.json and https://artists.proofprofile.net/proofs/artist/55d902db-e64d-4b7c-b435-ad8f467df539.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 0xa68a1c331f15ce7c25e10b3f8a5971226e1c3a32180be82f689b24d13afa22c9. 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/FIBAR2300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e249cb3112b2ca162925c2c7d4f62b89f79fbc0f90fb3a9ada2ca640e7fbf4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIBAR2200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af92bbd454ecfab8c03786bd091767eaac328da9086c2f7c85102341c4fc97. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIBAR2100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf6982935b17ed59aa8b68c3ea802aca4eec9ecbdc78f33c92b1a4ce958609. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIWMA2200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662695a0111875c809cc30a45e11a895762dffa93d6275722e7ef7dc09555216. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIPEB2200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68a1c331f15ce7c25e10b3f8a5971226e1c3a32180be82f689b24d13afa22c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIBAR2300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a77c0b1c72220abf4181d6daa748cea638b95ed9eacd22ec3bdfe4ae8612be5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIPEB2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e0d45b73ee19d7ba0de37a3018db6b43e314ae0dc3bfa205a4c61e2324128c. 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/FIPEB2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaa7de80f3baf18bdd60be256dfcec097975d3d821205ab3cc3818b971554fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIPEB2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0896ef08e3832d3b9f8bdf9f3613862e1af28c8656aad8b27b2a7c3ce972e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIPEB2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6043ae229c62219b7474f3da3dafb17139fd2464fd50415a2726a9d606e67a87. 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/QZK6L2102019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6390107bbe52ac6e8572abb5de73dedab20a6d4378123540e6e3b575083f9b7. 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/FIPEB2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b54ffabaffec961bc39801371c5b4c3ee5a9ce0363996b8abe036550f3a2e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA62244265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b14aac1c633800a12d980ec9faf4fb9e545425ca356f3d7c5d071b37a20ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIPEB2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d2e79a8898b565f1954631e321e3f265e756307ff2379053bf134ac3b21037. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIPEB2200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057fd857e0565d6265ad4a7c6f2849c1bc83a2b5d631446e4a22688fde613732. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIPEB2200176.