CASI or Casi may refer to: Acronyms Canadian Aeronautics and Space Institute Canadian Association of Snowboard Instructors China Aerospace Studies Institute, a research institute of the United Sta
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 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 0x1a034ce36fe61b3a6a45606d4c33886672c9048a6f962d05c71f1b631c22b340. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93b2d4d7-3a18-4d5d-91b9-d959420c5a3d.json and https://artists.proofprofile.net/proofs/artist/93b2d4d7-3a18-4d5d-91b9-d959420c5a3d.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 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 0xc3444bdbb7b014857f851195cacd597d6099f73bb2d70b79d71ea25886996507. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZ5AB2148034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9304ede5a1429c983dda607136b4b7b535a6c6a9c41f8dcb489e0d7c297b42f. 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/QZ5AB2148037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0eab80bb9773283fee4928ffe3a1e40653bb1ad821e6c8368bb6eada5d2c21a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZW9K2471616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3035c791cdc0377da646c7863e47b82a3ac49917404322696bb3225f3d91970c. 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/QZNJY2458307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa858b9eb7cc98b08542467a8f1cae22d2ed5639e6c2842235818dc9e4756581d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2343187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ea4b3b7b6d30f383443da4cc203d57aa97fd021bb03a68b4c1378e243ce1f6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTVM2381948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18ee88c2ebd7a29686d028738788346f547c289787477bc5ffe06dc8afcf296. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMZ92492501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a802873c0708bc7c7f4c4740803566ff8acd284a3b3946e8de46cf6d9db2fb0. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZTVM2371900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907cf64b564ee85cd8aac07a362f49a752b8563cb38d58be4a7bcbe86c905507. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US7VG2495060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b14eb273b7470b0851ec519f3af797d4e2af0f0f07d03858bbf0ef7e99e130c. 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/QZMZ92492502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af5eb2a25cc5a53dc0b23726141060dd2f030fcb32001101fafdcaad360fc68. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92492503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063caf061630532f23b9a49f870b26efd58d8b4787cb93abab9e882f8f2cc3d8. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZNJZ2391341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a802873c0708bc7c7f4c4740803566ff8acd284a3b3946e8de46cf6d9db2fb0. 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/QZTVM2371900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe994e70f9816133c1db91fe36a1b47802eaafa2d7903b0efaac50c8a7fe83963. 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/QZTPX2233461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bee6153059af7e0b4859934492ec9ebed26f65be92f1b7f83f173c3445ced22. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZNJW2222346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166a3acd07e334c39dd3cae85f82e039fedc268addb122de628df0b74cde1c52. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZMZ92269981.