Gideon King & City Blog (GKCB) is an American band based in New York City. They blend elements of rock, jazz, R&B, blues and sophisticated studio production with three part harmony. It was founded by
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 0x17e31f500c675ee76f9f36068f19dbc5df424c58d79bde915f2a64924239f465. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7afbbd0d-ad2a-404d-8b0f-68894d7cd077.json and https://artists.proofprofile.net/proofs/artist/7afbbd0d-ad2a-404d-8b0f-68894d7cd077.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 0xbf9a73f2ba48f3eaeaebb81f6a69c30a4031f1409965334cb5a64817d6079eb2. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAFZ2281290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b5a4f95c8804fa750256715d54ac32360ab25223f01d2c38bb4823ea4843a3. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAIM2426199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09766d32479972f5b998553031fc33b50354e8c3ba916ee45311261ec4c559b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAHF2304415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d875a60bc93b28943df793894c0d7aa9acaee7ac5b858e99fbff7ae6962850f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:55Z), 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/TCAJD2592061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aad11c9a8dc9fed476252cbdfaf698c9c72056dc1f516cc7cc5438c18799daf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJS2515671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aad11c9a8dc9fed476252cbdfaf698c9c72056dc1f516cc7cc5438c18799daf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJS2515671.