Holden, formerly known as General Motors-Holden, was an Australian subsidiary company of General Motors. Founded in Adelaide, it was an automobile manufacturer, importer, and exporter that sold cars u
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 0xcb8526d672d8908f29db835cb6fd2bfae5cd9af0d30b1787f9c2584bb816e199. 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/add49809-0037-4b7a-8235-1ecc249ee14c.json and https://artists.proofprofile.net/proofs/artist/add49809-0037-4b7a-8235-1ecc249ee14c.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 0x587f028d30a9ff36229aafd4ac7127283ccd8919a610c3884ef1e1f0267f9554. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/FRW460200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2685f0e081829f3ec91a1afa3171af7474bee7f65aa1e31fcfa6a94cedcb29e7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:30Z), 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/FRW460200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288bda156d113ad9433bdccb8483083e7776ed574f2b0096fd2b5926d1bcb09c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRW460500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7c37b33bc60e53702a8db7d2cc3dc10a38dd4f44d88d327f0fc9619b8f383. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:17:59Z), 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/FRW460500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4f3a431524ee0f568bb86621101ae1f4eaeb0cb423e65c909b764115b586b1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRW460500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91cfb7f89a22034781e23d99771fe042aeb7816aae5256c53d3cae9bc0f08b. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/FRW460500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff47714c5ab9b5c02770c6e9db5d822c69884193b7e8edc5cf17c905a853c1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9W11100429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b1c0e4fa27f097dd8a430401805d49b11fc9fe01028bc6f3e009823676eb0. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:57:36Z), 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/FR9W11100444.