thumb|Simon de Waal Simon de Waal (born in Amsterdam in 1961) is a Dutch writer. He has specialized in television and film scripts, he won the Golden Calf in 2000 (grand prize for the Netherlands Fil
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 0xb53a4df5c35f84d9503e90842df98954e44c8a31947eebde359e660862d68b57. 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/25914455-9f9c-4681-9c38-73478479442b.json and https://artists.proofprofile.net/proofs/artist/25914455-9f9c-4681-9c38-73478479442b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Een schot in de roos [De Waal & Baantjer, deel 4 (Onverkort)]
Een wolf in schaapskleren [De Waal & Baantjer, deel 8 (Onverkort)]
Een tip van de sluier [De Waal & Baantjer, deel 9 (Onverkort)]
Een tien met een griffel [De Waal & Baantjer, deel 10 (Onverkort)]
Een rat in de val [De Waal & Baantjer, deel 5 (Onverkort)]
Een mes in de rug [De Waal & Baantjer, deel 6 (Onverkort)]
Hoofdstuk 1 - Een mes in de rug - De Waal & Baantjer, deel 6
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 0x8de2bbf22ac5e665b106ffa50e7f14578981776fb0c57fbbb06c559002d249d5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107587 — a six-check JSON result.
Hoofdstuk 2 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac0de3a928b45486c31a9d65d71d76c3174910181bf9db51bc8d9746395746. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107588 — a six-check JSON result.
Hoofdstuk 7 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65efb905c689054977baf3fe6333aded9300dc27926d8514a02153d397d13c7e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107593 — a six-check JSON result.
Hoofdstuk 12 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde0eb7e350bf6f9a81c003f294373d035e95d70ca40a69afaeac32e633c814e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107598 — a six-check JSON result.
Hoofdstuk 13 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af6796a0e46f86152c703abc82bb757ce1a19663c3303b8c3ffd19946b63633. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107599 — a six-check JSON result.
Hoofdstuk 14 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5c10ed1c3c05b3a654050e6e5f67f012b7f5b2078735748464ef1d10d2ceb5. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107600 — a six-check JSON result.
Hoofdstuk 16 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5381c2ebf2a9b820dbe28d46a033c88364b9ee8152fbf1e391b45be3fa45067. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107602 — a six-check JSON result.
Hoofdstuk 19 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafe7135f346a2f26748149a19935b455a8253c1c0c74d6dc278ff05b6501231. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107605 — a six-check JSON result.
Hoofdstuk 29 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc14709077f3dc245ca729cef3c7c3e5694fc81b582fa519d4bbfd255f846f37. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107615 — a six-check JSON result.
Hoofdstuk 37 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22baf4aecf5f0fd387142a034e56407ae2b964b3f02175ce76ab52a154db41. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107623 — a six-check JSON result.
Hoofdstuk 46 - Een mes in de rug - De Waal & Baantjer, deel 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ce26849c1c531d31f6c5ece21a9842f27e0ea4f2097ad1423c6ef89d05d03. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12107632 — a six-check JSON result.
Een lijk in de kast [De Waal & Baantjer, deel 2 (Onverkort)]
Een licht in de duisternis [De Waal & Baantjer, deel 7 (Onverkort)]
Een dief in de nacht [De Waal & Baantjer, deel 3 (Onverkort)]
Hoofdstuk 1 - Een dief in de nacht - De Waal & Baantjer, deel 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0884fd9a098fb8aac0296ea3a09e3bdd56a7628e68a597c86a53228e3b3896f9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12178566 — a six-check JSON result.
Hoofdstuk 3 - Een dief in de nacht - De Waal & Baantjer, deel 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f389f0c2e2243df95b83489a3549fb8d7b28bb2d9f4f8398506bf14c47ccd2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12178568 — a six-check JSON result.
Hoofdstuk 9 - Een dief in de nacht - De Waal & Baantjer, deel 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc80c7361d12e25cd928860e859760a0e0acf22debdc4d2c2ad25e3d14ea3fc. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12178574 — a six-check JSON result.
Hoofdstuk 10 - Een dief in de nacht - De Waal & Baantjer, deel 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83afba6a80412ca1c059668ebccf55f6cdca59f4915ccc460fee508be4d8c68d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12178575 — a six-check JSON result.
Hoofdstuk 42 - Een dief in de nacht - De Waal & Baantjer, deel 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07fa0a54ca6381ce41dfd18ff0df53fce27858d7f3775f7ee0e65211ebaf279. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO12178607 — a six-check JSON result.
Een Rus in de Jordaan [De Waal & Baantjer, deel 1 (Onverkort)]