John Zacherle ( ; sometimes credited as John Zacherley; September 26, 1918 – October 27, 2016) was an American television host, radio personality, singer, and voice actor. He was best known for his lo
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 0xeb05ceed075b39c3f5c5cfcc5122036b442660146617792d0259477e3f4e4829. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30cb81c1-530b-4c5a-a86d-90e8baa27579.json and https://artists.proofprofile.net/proofs/artist/30cb81c1-530b-4c5a-a86d-90e8baa27579.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 0xfadc51dc29957d3c58563c04e3c5781b5a02fc30d09f5ec41bfb4599c1037530. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA171091094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39591944b9926c4538807fb5c92c58605c201076c09be6e606266bde4cf0a5cf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:16Z), 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/USA171091101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6d19659f4ea00a594b196abbffdd454e9df357df097a541704ab335ca84ca2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:08Z), 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/USA171091107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fc1988602da75fa8a577b215ea56e61837ff7a3e8514cdcd079e8c19712a5c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA175840010.