The Advisory Circle is an alias of English electronic musician Cate Brooks (formerly Jon Brooks). Her releases as The Advisory Circle are on the Ghost Box label. The Advisory Circle's first release w
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 0x2d503b9477de3bed61cd470a89e4c4f1fea21c8dd7bca8fb167468bdb2faab4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5ed0aa2-fcac-489b-bad7-6f7000f51794.json and https://artists.proofprofile.net/proofs/artist/c5ed0aa2-fcac-489b-bad7-6f7000f51794.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 0xb9180d09e577c34a43b7f7360496368e4340299eb2d9b0b773bc90de78fd5531. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBGSV0800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15124dc8682684228711dd38f566064fd52250f88374f3cc3b4884daa9aa532. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBGSV0800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc33c9e04e988d073d173ddab358115cede5ff38749562eaf3c7058d91ebabef. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:51Z), 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/GBGSV1100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9031616fe512dfdf58695034793f3db73cfc3d73566d4ab8bc79f2a61939a34c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBGSV2200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce4bb3e2fc1970ef7d2a74247a1bc917ef6248ac0a03d917322b486dcaaada3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBGSV2200628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb9182f25b286e18810a26d5259946d77e3a7700c7228d8be5a987a7f2713f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBGSV2200634.