John Dee (13 July 1527 – December 1608 or March 1609) was an English mathematician, astronomer, teacher, astrologer, occultist, and alchemist. He was the court astronomer for, and advisor to, Elizabet
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eb4ed1510fc508a0d01883010213b1c54dd1e94f858382f7b0f9e3e7c4949a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc381080-796b-4ebf-89ab-46c67b01a09a.json and https://artists.proofprofile.net/proofs/artist/fc381080-796b-4ebf-89ab-46c67b01a09a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38da7162ff4f04300bdedf5f5ff201201cf6893f23053e770e43f704eee81470. 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/QM42K1904791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32060a7db959f7f8c6ef667c597e298eb2987bd9078e56dc4de696aa30a4925e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM42K1985469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6b7567d7908807d2a3e5e37eea9732cdfa570dbc4f1eb9b79b23b9f2f29db7. 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/QM42K2030325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed746c30aecea96b04394d8468101c59dbdfc14d6acd2ce6244f8be7105737a6. 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/QZS652110245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04539e1d49f754cd5a401513c7b7481be77ad145d204f917410d7484244e973. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGB2265655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d54445d221f130b78900adeaf576c1c3b20b8d2207dfae0cbb47aab7972fc7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:09:09Z), 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/SE6SA2226807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2d91e96b298daf5deb44a9998b0c5164daf860fb71bc03faa6c27d289f40b. 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/GBTMZ2201133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94be2477e1011b691422a38bcc2aa66865175632fd4df8f0f3b0acdd6d86ca8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEPI82301413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee82ce1627860fd4e087a127383aebed50f92e2e161ce5ca77719130c5ba69f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DEPI82302496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20307f267671dd3ddb7960da2bb8c86339e4e0fef7962b9885032360b890978c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEPI82306408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ed287ea0efe6fd6a4ba670074d9c540dafcf3a3a83125952d60c65a105ac5d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2310163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9194f9d8d72257dd930b09452e51709bade234b39923d5540bac072924aa259. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/DEPI82311411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1d4819cb17f090c14951b0a9d7c2ef1a1ddb98fa45463a5857493d9d6eef02. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEPI82323462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a710941307a9315188e28a9fc6a6f65737d44f5137ce6065166f5e9a7d3b20. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2491033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014cbb7f42c33c191fbc870618e803251d761fe3f00bd85c362eb3034cc4e273. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE6SA2510252.