Christos Konstantididis (; born February 23, 1963) is a former Greek professional basketball player. Konstantinidis spent his entire career in the Greek leagues. Professional career Born in Thessalon
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 0xc549699486085c236955914ce4efd8ab8dec36866e33d6bff9cb030c3ba9707a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/322c3f8c-f883-40e1-ac71-31baf24c9f12.json and https://artists.proofprofile.net/proofs/artist/322c3f8c-f883-40e1-ac71-31baf24c9f12.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 0x3baa507214e6f5c22bdc9c4eca66b934203ee78cb0de71c4516d9dd6280a13c8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE4RG1940001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e579ccc6bce2b7e0daa27bb3ded9c872de3fab7a9f7236c48073a37252a283f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:31:45Z), 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/SE4RG1940002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeea15829127e5e349aede924c8827014be36e49525312d922364c6664155918. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:06:55Z), 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/SE4RG2006202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00ee08bd52b608c38148086a5dd0922995d7577fc3d24f80f203d082c3527b8. 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/SE6RB2036401.