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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd31df4f4d0d78ee1bea1dd24d880ec93d877ca18e67b81c799fc854334b566. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef83af77-2ac5-4391-b56b-c3b8f874945c.json and https://artists.proofprofile.net/proofs/artist/ef83af77-2ac5-4391-b56b-c3b8f874945c.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 0xecf24914f7f6185f00f82bf01ce78659f264cdb155c7f34bee414a388b273dcb. 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/UK3AZ1925113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3487dd57d4b6382936b673b6a591444622ff2167a6a093cb2fc4cd532fb8fff8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:39:28Z), 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/UK3AZ1927282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7388df3449bc4191bc71e0605a9edd35fc553136c59543261ea925da51901214. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:04Z), 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/QZN882211790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55f00b63ed519930dca4259a7fe6820b0ae2c986362c911c824ef926a013a40. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:09:15Z), 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/QZWDW2213361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43df6039e6319d0ec79653fd2dab83755673a99b8c5c8193fad48f212eaa4d60. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7K2489081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb166555c35643bcb0fc317c7af21c091666684c5f70308c4ffcaf41a99d347. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7K2489082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab3113a008804ea9b3b9ef487ef761a4bd7347b045a9eb9567776d07361e66d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52562722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8004476dbc75b4615212e77fa6efed2542df13d63514ba1f8c3c0e9c287e2f1a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:45Z), 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/QZZ7Q2502464.