Sleet is a regionally variant term for some meteorological phenomena: Ice pellets, pellets of ice composed of frozen raindrops or refrozen melted snowflakes (United States) Rain and snow mixed, snow
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 0xf5e310b3b15bcadbc3c8f45f7f9a495e5110f9d874c249829b89b368db18f91b. 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/8327d6d7-927f-4729-bf01-8499006ca584.json and https://artists.proofprofile.net/proofs/artist/8327d6d7-927f-4729-bf01-8499006ca584.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 0x3d335d05d635c7274acce2e83c272682c591f15d8162f27c8d7bed751a461d38. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZFYZ2392719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041371d908d633cd0806f49aa3d3fde07fcd72b9749cb9f649c2c61eaf0848c7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZDA62345414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410f7bfdcc43918aff7d03374e989b9e482ec2a8361c18caeaaaeea54809dc98. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6Q2314784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899341d854cd13c93a16a8f9c6909a8889f81c19d28aa3abe9095059301cfcb5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZDA72471817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af259023e98d721043560fb9bd1afe0fa5de6cca2ab78c2f8705de07d2dd71. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZRP42465831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4a3db6b90729970a32a39a415b08c31f9ca4b1932cc022dceb28f8d68bd88. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAS2451204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a30f04d55d1ca191f93abeecf77a44d494f82be4f666a6890be20b0fd1bdc3. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZTAS2471435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28210542fb5c7c733ecc6eb8b77f72e20f5c0a5a9e7add72bffc35c8093885f. 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/QZZ762458513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9134a0eb3e41fda26e8c4ae3ebc7c3350907d084bc28343db52549bbf7687f75. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7L2494386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd499fd7305c68ca4d5e1dcd3ed039b4d1473e2b5470d1db3269ad2106487c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZZ7X2441168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b7b5de69725a36c6feb6f5d95767baa3abc90a8c382accefea5b16e861231e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72552984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe26879e27eaad222a5fcc1953367ef34a6f5003e0c35487bc84076bd6631e00. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6M2562280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6580fb2807bd6d4efe0a03c8656f564485b828722d9111e25f3aa33bc10bad84. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6L2562958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd77f25b0db60ff7d1da94a7fe6c37266da98bcf32869d26bf1b0ca3ffa59c5d. 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/QZK6K2517109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572c59d161815bd156be26452879905e0fc152ad5566ea78e8f5f8bb1d112dea. 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/QZK6K2543983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8306c3397d57b5b2e3361e17e1b9ec90094a4a3882c45f7cd1cefca1b673e97f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEN2575351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b02df77ae10b8c541d5014579ab5d09b529e3408fa570144e3e1e8e02e198. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB22534071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4d29afd9bc98e4626fcb3b6c5dbeb96462450f4776c9db1d4133d5adace97a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTB22573568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cb8ca79c100e93ad7f757c7d9823917e21519ed91f8318b3a1435167998b2a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB82522066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f6620a8cfebad3c12586aa73678ad2a93f51f6f9a840efbf74c3dd2a0e9995. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2561066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7836476a4401bb96d849949c7976b5bc065233d428e28dd86b924d8e58a2cf11. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZZ782527823.