Ralf "Bummi" Bursy (18 January 1956 – 14 February 2022) was a German pop and rock singer and music producer, who was particularly successful and popular in the German Democratic Republic until 1989.
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 0x8b9c736a2ecaaffe81eb316b5ae17a732d39e6759a2fa8ed58563fab01e78f04. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67d3822f-32c5-4d0d-a7e0-026e4a1081be.json and https://artists.proofprofile.net/proofs/artist/67d3822f-32c5-4d0d-a7e0-026e4a1081be.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 0xe3ab6aa1834a44e5b6f570b76c9fddba6e19aece25d6e0be14871b5f3429bc7a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEC739800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b4a1b09f5d6f3ff2d154dfc750541f6eeea22602f28a14061a6664c9bf8f5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC739500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecf6e75a22877b1395983a8859ee76ad2a6c74c556300cba80655f7fc63e673. 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/DEC739400579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de9e7ecdc4e6812293896960c9a475d1312574673b85357766e2e2bd345e490. 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/DEC719400547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd797f7fa1e688ed647a42f2c43decf2df3183dc75b2190066ec5f2050acd679e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEC739700326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4dd3ff554768c595b1ea2eb193a7732e73c2879358572c68e4a0e8e1cad328. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEC719400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b4a1b09f5d6f3ff2d154dfc750541f6eeea22602f28a14061a6664c9bf8f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEC739500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de9e7ecdc4e6812293896960c9a475d1312574673b85357766e2e2bd345e490. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEC719400547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa818846237d9ed452aead23293528d97f6bb4e66bc32bd54a7b4da9ea95cd9ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEC731000167.