thumb|The Nightmare (Henry Fuseli, 1781), Detroit Institute of Arts A nightmare, also known as a bad dream, Retrieved 11 July 2016. is an unpleasant dream that can cause a strong emotional response 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 0x2c9a84bba07f64fe4d86253a1487027e63419ba63fd2def6c07d64c7dba9d0f8. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04d16c0d-5a74-49ee-9c09-f90646030cbc.json and https://artists.proofprofile.net/proofs/artist/04d16c0d-5a74-49ee-9c09-f90646030cbc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Waiting For The Twilight (Expanded Edition)
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 0x2f2f2c9cffde808e7370e4f36dd11f7a9b97b2763608610ea839d4d9acd81bf5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:30:11Z), 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/DEU600902647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0908bd64cd54d8be827179eaf44f001a8aaa9ede2a9bde18f4bfe638b73c4438. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEU601203898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa97b898d966dbaeaf1c8a2d3a86b982f963fb651c99afdb49e64bc7670171e. 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/DEU601606513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d32a81d2eb4db732ce7219db522766f16fea0e9690e3cb5577107572c2354b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEU601606522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4d7be182f359031398535cbadd21e4c5382f5eb0a612ef4df0b905c39f716d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:57Z), 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/DEU602008822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfcc034a557959fb885447c5a9d392d2c35a640d42a57db33b713c780e08f2c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEU602008824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a426e9c6d1040225815955e0e5f1d8316849d2235039204e697f91fcd0fb15f. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU602008826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b9252b478806ded4f3978e68dc4a40f03cf492665c9bc3b1cb7033fac0f93. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU602410942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe46b21763b8648cf317616e2cd5ed4509709b57a1851e538868bb9bb0aca136. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEU602410943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8153dd1161b97bccdcca4b24357c267a328d1572b5d99a59bd11e36d07ed5b23. 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/DEU602410945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd08df72da1bbeecfe0c9e51348ac3596404bd14d42609c49c15d4d4c9138b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEU602310844.