MZR or mzr may refer to: Mazda MZR engine, the brand name of straight-four engines engineered and built by the Mazda Motor Corporation MZR, the IATA code for Mazar-i-Sharif International Airport, A
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 0xbaff787cdf32777cab648877350be200a859cfa4085dfbce4d8306e8e8ad91ee. 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/76d4d2cb-e999-4bb6-9588-9783ca06608a.json and https://artists.proofprofile.net/proofs/artist/76d4d2cb-e999-4bb6-9588-9783ca06608a.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 0x02dc28e8f6adb6f758f9b43434a4a1a719b49bf776f5a9eff7219ea2c5978bde. 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/DEH742311986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72787129a09f6067a77cfa6a3145860108df4978d703fa19452ceeda12f5d21. 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/DEH742311987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7822cbcf46cc1cff14f180bbd9df30f3e237733af375aa3bc3ef1633645b71. 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/DEH742311989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd85d38c0cd876193d8b36a8a59bf3d0825e4cca44fa3ba3ebac6abd988c78. 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/DEH742311990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c1266c692348701232083cab8fe4e203500affe8d9c2a79118a0ce75542363. 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/DEH742311992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c046d4b309d89e4e354ace985bddbafe510fc47e3a5eb7b61e5e899028be53. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEH742311996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ef44565bb5b5c77772c6412922e63a4f9e0d82985a2589a8e1b684ec5db8d6. 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/DEH742311998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0717f05173eaf53e9577f6b04b6f105d1551353544dd8fff63ff79a469a66981. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEH742311994.
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 0x13b56ee049d4619ba247ff237ed10e75a152a4386d55c627ff6f9aa157e44941. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42226066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4685710d69d6c7858ba32cb94526853693b30d99dea53ee0e997906eafe608c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742211941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f7f1194eb73f1e084d522cea2227568e0395d3dbf0dc2a81dc80a8c810ffc6. 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/DEH742211947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2e7146f2aa71ed4d43839531fb56c66cecc69b3b14f7e2c16a59e9f03d0b6. 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/DEH742211956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7779805a4a084c91130af6c64979d7ad1ffe1f93db8d68f80182ea861e925420. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742211959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ab637b18de218496eb87420eb95993dcc45503f090d66112e475083dd58fe1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742211961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0255aa246e88c3d4a58d77b790128400cf72b64dae401294ac94f3c92b1fd20c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKXYD2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda35802c1eb7bbe1eb3a83b92914d542bd98546e39bf9eaa2ff64233f53dd788. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/UKXYD2000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254af577eaf1f92c96f7568ddfa986a6710ddd3243a3967eb8512c78f07f7cd2. 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/PLR901800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326f92e7afd53915614973fb6c3a7bd82cd216d9f94375a8c595b2752df1edf2. 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/PLR901800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a578bf76639c62c64d0a5bada6ce700b48a39f92113f0a57963b0fcb27e7417. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLR901800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29166ee6ae7042e6aebe7ba778fa5fe15bddc152ed23ac63195f0c512f93d85b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLR901800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e420483af7e0caff4f932f0c30750be1e520abd65cc70113e67d459192e66. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLR901800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d78883165b90d10c68227bf4691475bb707e2bb3b0fa4528e80eeb4da36b420. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742421326.