Friedhof is German for cemetery. See: List of cemeteries in Germany List of cemeteries in Berlin Städtischer Friedhof III Weißensee Cemetery Zentralfriedhof Friedrichsfelde Friedhof Fluntern, F
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 0x02b1c94697c56cf8b905b82d7f1dee60c30074f78172c30d9ee51cf00a3d04bc. 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/9e6abc8d-1341-482c-b1cd-2066e602750c.json and https://artists.proofprofile.net/proofs/artist/9e6abc8d-1341-482c-b1cd-2066e602750c.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 0x704399d4c20a4f473b4efa27f8ec13ce073ff102cac0c5ec6095d500ab5e0c52. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHM2309374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9168145999f85330735000d6d6a270945a6d27bf31b5eaeb3193d1282a15ad. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZMHM2354572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf9e6b53989b436489e42ce0a6bfd9f509a5bea7950ef8dff6161fed7b49bd8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS632356590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371efbbc215753e85af4c1ec748440c47f1ec739dd45b3d3ed5493babf80bbeb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:18Z), 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/QZS642212397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86545efbecd5207e911bca7324b7d186bb528a3574c77dafd8f076051e3c4cc. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZKDK2249889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed97ff14349cba363ad4019de92bb9af9f3e4f808f1e10289e705387e7dad58. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM42K2269162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d601585cb7d594176edcfdae74a606f7e060dc821abb383b3cb776b97cdb33. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2280487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8323f76eee3597d2c4d98006ebdbbfc34a321ca4a6e484322ed4d1108e6f03f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZS652216579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9771c822822158abb98369a66d95e1caf2feddb4a3fb9ba9464476d7428457. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS652426108.