Blick (; ) is a Swiss German-language daily newspaper and online news website covering current affairs, entertainment, sports and lifestyle. Based in Zurich, it is the largest newspaper in Switzerland
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 0x11620daa40e59e8c62d94887ccd35888b2259303f78be7f62e381533f8b4d7b7. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1771b6d0-f4c7-4558-957a-11a5bf406819.json and https://artists.proofprofile.net/proofs/artist/1771b6d0-f4c7-4558-957a-11a5bf406819.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 0x097d258e64cada4e14fa710adc122fd12796817c4e3fd437bd64d2a3419efffe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:55Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYT72100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc6be95220f5ba2ecfc30cc05a8e35b3d0b32f3d607a689ccd25b6a4050bc20. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:18Z), 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/DEYT72100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdf543dbc23a276077a6f73bb984ec99866783992215948504dafd59ec16770. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:01:33Z), 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/DEYT72100634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14925fe23d7086bbb8712eab4c6570629a383d72807c694db66f060e43fbe162. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEYT72200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7086006ae19cf40d734b6f36b7d77930b20590fde764b5b27d6d2ddeab1e19bf. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEYT72200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e77a2daa9fe87b19671359541342b317dbd0f26ea2f2c3ad7603026c9536ad3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DEYT72200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6713591fa32be9ae4b8909a922a3bb62b1755b5c04c84683777e8c4dd2722c28. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DEYT72200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfaf2c17a93d5fb46538b51b8704ce4f931ad4bfb010a281c1463b266c515e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEYT72200096.