thumb|Arne Semsrott 2019 Arne Semsrott (born 1988) is a German journalist and activist. He is the director of the freedom of information NGO FragDenStaat and founder of the political initiative Freih
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 0xc3bab9b207ee3ce228c7ca07e48b6c0660a3e9289204d6100b71f92a9a9d0ea9. 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/9ed18a7f-d1cd-4381-b969-dd30003cf671.json and https://artists.proofprofile.net/proofs/artist/9ed18a7f-d1cd-4381-b969-dd30003cf671.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Machtübernahme [Was passiert, wenn Rechtsextreme regieren | Eine Anleitung zum Widerstand (Ungekürzte Lesung)]
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 0x1dc46fe111ddd1ca0ebfc6a8be920e49df2c4ab3f57dc9ea395a9876a114d589. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEXN92425346 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a1429be84c674abe20952c5a91dc8443cf413729de5ebb8db422bc1e1d913e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425347 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c798b35b6642a413699c28f657e589aae1b3cb8711a61d329f466d3f8b78de9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEXN92425348 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fb0b11bbcb8604dd2e7042865ffa00f882e64b2ddea5440aafbd37292e380e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425349 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1b590d3e452a5a9c26314c55b46600e9796b20442a1fb3a3450857dfc0d2e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425350 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd4861360a1c095aacff46bc0260a5e59dc183aeab4dd8b6f1540f9a31c9e9b. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DEXN92425351 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d15826e07fd1156b16a756e4ba7ad1b8b7d2252fe5d7f5e301d966b909f4563. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425352 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c4ed222bfadabee6444235f9d235ac31989c4faf2bf4b0835a86b8e778fa17. 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/DEXN92425353 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd625d99c3d1bdd295f9050274cfba1fc576c7ed80d65a43c1476a1ddd550f994. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425354 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50283578471d878a3bc50d9cf74cfc6f752230570512a51644fce95e5ec31e09. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425355 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca8af3b6873c9ebe6a6f8a9c932e8ae139153e48f9ab776e94396cb0b50cc6b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEXN92425356 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c0580da4f9ef2f0365774fdf92ec82f09aa850706dc774984ca36b971a6af0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEXN92425357 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fd904425ad060b082173f48dec34b2f4740317710674424b0c3c4ab2a96ebe. 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/DEXN92425358 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c25944f0cf9be31cfd00d6f5e267499872be90c7d6b1dc280976c293c66ace0. 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/DEXN92425359 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 11
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d2bd3f013e184c9d02cd343de2ecf78b53866426e5875f81c56df3e347a9cb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425360 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 14
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4908ce25811efcde33659b6e24ce8f95f8629867b1d6586f91e942d5800018. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425363 — a six-check JSON result.
Szenario - "Nie wieder" war gestern, Teil 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e7796fec2d96292e4a88fcfef4a9f7eac6d9b21d7d149db61a16fc5e41bf07. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92425365 — a six-check JSON result.