John Vliet Lindsay (; November 24, 1921 – December 19, 2000) was an American politician and lawyer. During his political career, Lindsay was a U.S. congressman, the mayor of New York City, and a candi
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 0x8ea9a8e3ef93073c56387c99cd3593a9ad59bb4a98e6e7c2b60083731dc02761. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2c5be72-db4e-483a-8469-eb2f3c2510b6.json and https://artists.proofprofile.net/proofs/artist/c2c5be72-db4e-483a-8469-eb2f3c2510b6.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 0x52392e98077bacaaeddf7656b09f620db6ba770c61400dab238cfabb078b1068. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKDTJ1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d0490026097ab72e33cc184e007e8c2d56b1e0a47b5c31405cc5700180e2f4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKDTJ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81d5d4d9ac2f0bf5c83357bbdde023a13dce964133a5976c6037fce44408d34. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UKDTJ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b25b2415ff3083a4ef94b9585e0ab26aaf0b693d8dba967d3079d11ab22868. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/UKDTJ1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ecc525657858471e5ee955f053a65cb9bc3e3485325ca1b5f85636a8acfd00. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:52:23Z), 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/UKDTJ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d78d35dca379d85d2a4544e48c41de1909238af508547f736edf075edb9f5c8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UKDTJ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4213330f327e554c88fdf0b5ef71e4bbf328df0d16955de71648098eeb934f8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:19:24Z), 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/UKDTJ2100001.