Dartz Motorz Company is a privately held Latvia-based company, subsidiary of Estonian corporation Dartz Grupa OÜ, that designs, manufactures, and sells high performance armored vehicles. The company
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 0xabb8f2743d64d7f4405e6c4c3347a523c9b24e5e4ead0e400d91f20b569274f4. 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/55f1ea6b-828c-4912-aa0c-eaca31d9027f.json and https://artists.proofprofile.net/proofs/artist/55f1ea6b-828c-4912-aa0c-eaca31d9027f.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 0xa8f9c747292afc45310cb3105b2557cd474cbfd519e982ece7f06b58507c58b1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NZRI12101196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98735f125a2f99e534a94215cc784bd4e13e17a573ce9c61e574d4f064b7f54. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NZRI12200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42decd64e577e600ab269800a61c346495b14c781883c5c341e120129984e35c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/NZRI12201865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e058dbdfd32906f4dd833351671a288b5296b409c8447127b8e9b49dbb1400. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NZRI12201855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbafe16cc962d2943688045e566ec00f98aea98c7d218885eaadc32b6cc334d3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/NZRI12201857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d77d94a937ed802f877dad5a5f324225fd0ccbc677d8ba3fc7ea3ae5526c2d. 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/NZRI12201858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e432ce7ca05d8c52b9fd00e113e387f1ef0610885315c29ef19b584cfc5895b. 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/NZRI12201860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d37553766cc0527a4db60e140ff19cb3b0b615709c12162a69e31abe9e1261. 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/NZRI12201862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3e287127eb173f01c0df1b821df6e7135d45808475ff8e7f1682e812f7132a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/NZRI12201863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156873a5004fc95cd0fb94eb620c67169955a5f7b5b6174cb2830433a30cf5bc. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NZRI12201864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf414e30fab9f842c2c8318bdcc8f8ef829c3d5c62b4fa86789969ab83e348. 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/NZRI12301687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78347e4db9fe26e6642c6d5b27e04692f5c9c2f7b8c2244760c48576721d8440. 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/NZFN02300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29a6c46e497aec9954fd1738c261491ef05c570ddfc04de8f26236d71939ff. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/NZFN02300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac292f9a2fc798b9f6b460ec5605f6addeba4e2322578ed5ae9d8258b77fa92. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NZFN02300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f579bd720c0829110200fb371aa5953ea5e70362823ffb6553036c70b65de8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NZFN02300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5e2b6130c19098110c0ad4fb76148ee609ceb4b3411dd15677e7a451c6054c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/NZFN02300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d55e7c8243d27e38ddb0a384fda79757b88be38b8a6c3f944db87e9e12be9c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NZFN02300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed733be308bea87899bfb686e5027b071e779d1986189c3c0218f16a2b61964. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NZFN02300131.