John Sidney Linnell ( ; born June 12, 1959) is an American musician, multi-instrumentalist, and a co-founder of American alternative rock band They Might Be Giants with John Flansburgh, which was form
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 0x3f671d73e237cf01e65e7f03876f1e2818b8a3a68c7639f337d4f8c8bab8fb72. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/046af5ef-b990-43e5-9b61-5e0b57124972.json and https://artists.proofprofile.net/proofs/artist/046af5ef-b990-43e5-9b61-5e0b57124972.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 0x9595efb9fe5f3ea589f844c5fe94683f5f5cf26dca9ce54ae34b19f9e40b320b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USZO19900502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63b262187651cd5c1afa918146bddd4ebac36621ef3fb1dbefcf229c33d16f0. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/USZO19900503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296f6d4f7c8ff94f955ea0876edf9dc1668f9228ab5c6911256bd6cf994563a0. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:44:28Z), 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/USZO19900505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03a4c5ae2c82697fa54d9a2c9ec9bf959f4c8de55d6ed0753148edeea1da0c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USZO19900507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9aa718752cab0970d271bdd00323c329841970105224f3bc4d8783369b8670. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USZO19900509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65822f9b2af2375d6f6d82e1364787f273ba0f7267adde5ac0312bad7bfe1754. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USZO19900510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb9cca9cda8295d0bb91847001e5ea104c41aea0352dd89cb7be28459ca07a6. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/USZO19900512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26beb4a4e95bc2f174fdde268f5b3a9d7dab587df8fb40f01164dc4e38f60606. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:26Z), 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/USZO19900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d0ccb9d8a644bae612a847708b164d2e9e48fb4279adb49069324ea78ebad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USC4R2105851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7fd164dd2844eb677b415879cfcfef8f064f3b29ca664a0239136d55c7e25b. 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/USIR72000046.