Holger Schüring. (24 March 1938 – 5 September 2017), known professionally as Holger Czukay (),. was a German musician who co-founded the krautrock group Can. Described as "successfully bridg[ing] the
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 0x7da2b48b90faa1aaf0a80758e378b59ca78e00b77bc4ef3d74f84a2493099be6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1fbb69a-294a-4747-aa08-a357468ae6c7.json and https://artists.proofprofile.net/proofs/artist/d1fbb69a-294a-4747-aa08-a357468ae6c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Plight (The Spiralling of Winter Ghosts)
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 0xcb403d97ce22c2cb699251a5342057f146ba6d08abdb46f93d52866d53158473. 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/GBLAZ1801151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7b6ce6261a7e2ff9da4e44da448dca4824a2b584659b3bb10ad9a8922d430c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLAZ1801152.
Mutability (A New Beginning Is in the Offing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab60390994530e65c9d9611421ecd0a06ae9c2cc5371e4d2b910e5eacdff7157. 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/GBLAZ1801154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52a863edfa47194d47baf7b4eac6c4ff3968d6c5eab8b6a6cca4c737486311f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLAZ1801153.
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 0x2eecbb338e355ef48414d7e34aff1106c42bfea14ea6cc8f86a742856394ccb8. 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/GBLAZ1300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b6fd9c74213d8790d4ac0eceac6081e8956f577860f29a1b68b4eba5678404. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLAZ1300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d4366c4cef0d7e6e7e6646573f28b79d6a962b069e1db2b3c405031fe3b03b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLAZ1500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e789e81e90175f0d07880059e0e6fdcd2131243ba914701faa42fc3ddab376. 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/GBLAZ1400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d8f7a3d710b034941af19c8904899fe359a1c2d81b712ebdec665f2b471ba. 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/GBLAZ1500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e0a8c676dbf847b5b579746199e1527f83eacd70db17e54aa30a79820e538d. 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/GBLAZ1801155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0af9e9ed37f4ec250fd5c62a2aa8a7e3ec59948e229bfc12afde0c694f768a5. 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/GBLAZ1801157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26c8befb6372dc15b5c988581a9d7818242479796f916d5434a3f1e43fa03a1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLAZ1801160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748abe81c73292f26e892e6ab1c64a0427c5f81f88ac50728e209d7e4aacf41f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLAZ1801156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30833fbeb5716ff3bbbe79077572e5678a729009af6ec88b7c2311e2d34dd329. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBLAZ1801158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9ee418b3d715dcf7dcc7f0260d0365fb75407015e514f04864ce2807065e2. 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/DEA450614320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b00af580d774bb6d116dadea951e8f1f5e0b04db3aa6dc7d4654174b3734a1. 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/DEA450614340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff2cb82f04a882aea4c3f04db38546cef8e08540853ea10f8f56eb68853322. 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/DEA450614350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b464be6b6caed48480b0080237c20c41169be1b10bc6755c857c44ebcc140. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEA450614330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0367fa1969655c565e9e60644e9df1bc068d2e45a0d41000ab97e9890757cdfd. 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/USA560500561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87dbd0e23dace43549fd03b452b6b15d3dcee61f0e9ebe2a4767dc4eed42521. 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/DEQM61902845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886a1e590f60bb4bfe1553f659238441a4a10b5eb552f8770cce53fa2f373b65. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEQM61902843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27964a0278c76c4f4101dd545893f3f5a63f31f6fc289c9870877d9ed6d5e16a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEQM61902846.