Thomas Klein (born April 14, 1948) is a German civil rights activist, historian, and politician. Life Klein was born in Berlin on April 14, 1948. He trained as an electrical mechanic before enrolli
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 0xe80980b360e2d3332c402d5bfecf032f8021f5f8d59766aa9b8bef769affcf13. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e951d46f-b3c4-49a6-9114-0ab3ef80bea5.json and https://artists.proofprofile.net/proofs/artist/e951d46f-b3c4-49a6-9114-0ab3ef80bea5.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 0xd6ba29a51bb09fdc3dc0553ff935fd1f2f1c7d567caffc8f718f717b41340fe9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:16Z), 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/DEA550407619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc605477adf8efc84bf288215f11673b56c5df385145a5803b2e44f2cf91b37d1. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEA550407620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252d1b5e1ef9df2834d44c4bc6eb324c339969df6a5d3359ba05ad56a0bc3953. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEA550407624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f00786a7721950094e704212eae7476e2511ff4ea27f71cb5d40957b181522. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEA550407626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fc9c595d391ef414ca63f6c4d22e873b1de007fbb062d24c2d0c8c1c2b14f2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEA550407627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb735b02103e451dcba9ab763eb198fb198d31e28af97bf673e705aee934c33b9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEA550407628.