Martijn (), occasionally written as Martyn, Martain or Martein, is a Dutch given name. It is a cognate of Martin, and ultimately derived from the Roman Martinus.In Icelandic, the name is written as Ma
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 0x6ccee63277c804f34b487c8cd377a8ecbd689b2457f0d0de617a0d3f8f3616d6. 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/43df110e-2c89-4ccb-b52c-55a10b16d4ef.json and https://artists.proofprofile.net/proofs/artist/43df110e-2c89-4ccb-b52c-55a10b16d4ef.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 0xe1339b18d1ddc6968078a971cee76dbd59b8441bcfd89cefa2b840934e02e720. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:32Z), 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/DEZC62448263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dfc7fe34ea94954a4cd038aed606c79d42373b3bb9859390c21879cb1c683c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:50Z), 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/DEZC62469946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db37f3a3ab1caaf2b9cda6b7d85d42dc22bc234284ad34d8e51d023e4bf93f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEZC62576788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331b86a79b8214ca420a950985a26e1afb5093f964410d0c32e9d2c60d9daf41. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DEZC62580012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db37f3a3ab1caaf2b9cda6b7d85d42dc22bc234284ad34d8e51d023e4bf93f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DEZC62576788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897f13af1d958d01aa9d8f19661fff56e7abd5a65a99c9a0383af81cc5fd00c7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEZC62586113.