Mike Parr is an Australian performance artist, printmaker and painter. Parr's works have been exhibited in Australia and internationally, including in Brazil, Cuba, France, Germany, Hungary, Japan, K
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 0xb5118c0c3eadfa4e61d160b1c020e9a7012e65d9f45d044ea235a55ace031bc9. 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/4690a82c-9537-4a2f-8b1e-2aa2a1f511e9.json and https://artists.proofprofile.net/proofs/artist/4690a82c-9537-4a2f-8b1e-2aa2a1f511e9.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 0xf382552108c6acf85dfa08b4d50f34987d2f281eeb879b7c40d5ccdabb98fa36. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5Q51822687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea390cbd676d04b4585e2865b40a5835d7e9169f6bce52edaab5f990b62c3957. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE5Q51828084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d740a1e0776b30b2f8df0fa42653ec8ad79fd811aec5f408fee6dc69b5b5a76. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/SE5Q51817834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd456328dbdacbc6dd6e64e52530283b5b90a0771e008f0c7402965b45c0c0795. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/SE5Q51828106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc78a43979ef94a4dbd28347e560d3300e61589543c799c86689ebf26648a44. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5Q51822485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58927da5c019273e978e2fb883e0c6e0bd3f9fde279b4797d9ee2d5bb6a0e4a4. 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/SE5Q52000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bcfbf409c9e48c6600e3998a0605dbc422074e8414198359910f121b1ef731. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:38Z), 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/SE5Q52002319.