Ernst Gideon Jansz (born 24 May 1948 in Amsterdam) is one of the founding members and frontmen of Doe Maar. Doe Maar is a Dutch 1980s ska/reggae band, and is considered one of the most successful band
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 0x0ba5adce5f1a8e8cc3c371733cb48e873fbea99feb8ed99ca57ad05e4659cf35. 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/fd973b03-07c1-4e93-848d-b04c84dbec33.json and https://artists.proofprofile.net/proofs/artist/fd973b03-07c1-4e93-848d-b04c84dbec33.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 0x029c01b6a2bb5cd1b7dd1cf51d294a13a31534e784ada4057b3cc898f917dba1. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NLC240600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7bf3e29bc0c3ddb1625b04d14a400ddf741264f4dc32ad71a81fbe1ba04262. 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/NLC241000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708e786d8a27b8c0485729519ca6b24ed8e71513ae795c6bd5540f79a6fcd97. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:58Z), 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/NLC240900094.
Dromen Van Johanna: Ernst Jansz Doet Bob Dylan (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd166e606f5d7ccb08f2891bf50d9b4f8cc3e24d89d0ec52ac36e0b7dc5c3d48. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLE5G1700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b81e9d9ed11b35827ae02c78e84ee24cfe4c36db06e0d2401d8b80e29a44c89. 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/NLE5G1700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd74e53e367d3adeecbc7799c286ae08ab56843f4f02a04790c6201bd3d828bb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLE5G2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713c21b441fcdc5a1d28f47222e409058b3dc7b8e2d0fd4da931f0ffb25017ca. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NLE5G2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46728dbb6b31995997f3da5bde30a487c314e83aceb3edb3360902414e3c7102. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLE5G2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b475d15bedc161407e15f2e4b45a5c1aac3c040c89da61e3a026e81fd3a344. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLE5G2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35199f736ff01d37dd505245921e0f7227a2c8c12c6327496e5fd30261e61d62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLE5G2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74a759e2e5af9b96682723c875febdc4c820d17c3ebf92969b8987102c77ee8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLE5G2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1943224d11f3379b1d3270c929ecb77f53b72be8b46f3d5597a63a438b9d92b3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLE5G2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5984ef9f5ddd1a528912480c7dae1c59f458904a6336ef53d984f6df56f50f75. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLE5G2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7cc72bad23e5ef84257cd16e0dcc0a6764201f21b9ddde1e06ac2518f295a6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:54:18Z), 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/NLE5G2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecb98286a6dc2c050d08bc8f30bc566a00bdfe24a50dca2a3f6f6ff61518004. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NLE5G2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a106372379c2a4673e61578ebf7f027dc180134cb490d43173ae1b6e4d9e068. 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/NLE5G2500001.