John Oakman (c.1748–1793) was an English engraver and writer. Life Oakman was born in Hendon about 1748, and was educated at a grammar school. He was apprenticed to the map-engraver Emanuel Bowen, bu
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 0x19bca37e4fb8f2ea40002eac5b4b57fedf09269d0c07b8de0db854264dc04746. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53574572-0d2b-47c8-983c-e79afe0befa4.json and https://artists.proofprofile.net/proofs/artist/53574572-0d2b-47c8-983c-e79afe0befa4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Traviata: Act I - Brindisi "Libiamo ne'lieti" (Drinking Song)
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 0xe9a167f6f0f308cdbf754fad476adeae07ff3f5c7432cdae5351d5c99a922547. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USX760500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83360b3ea1cee35597740ddb8fa161dce6de44c43ff630682554f8c6398a4ac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX760500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7840294b9b214a96ec70405d3bdf8da4f4cf80e8fb6f3ee24e8d2a368f968c0f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USX760500156.
La traviata, Act I: "Libiamo ne'lieti" (Brindisi )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a167f6f0f308cdbf754fad476adeae07ff3f5c7432cdae5351d5c99a922547. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USX760500017.
Il Barbiere di siviglia: Largo Al Factotum (The Barber Of Seville) Pt. 1
Karaoke Opera: Sixteen Favourite Arias and Duets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c459463264a04456d5246cddc669b7f896936bf18119be116eedac576ae283. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLGL1252289.