Sina may refer to: Relating to China Chin (China), or Sina (), old Chinese form of the Sanskrit name Cina () Shina (word), or Sina (), archaic Japanese word for China Sinae, Latin name for China
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 0x268fbc4bb08efc3a80c8a25032b7b28a9bed3df142b0e0346410071fffa84c8d. 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/3cf9c797-06a7-474c-80db-365973673da4.json and https://artists.proofprofile.net/proofs/artist/3cf9c797-06a7-474c-80db-365973673da4.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 0x08ab0c39dd1d1854dcbfe7dd0a86270576dc16d89f0e5862c9e47370eeef294a. 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/TCADP1854198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78f93c5cec4ff5fcc8af7d628299312afd005d688be7950c059f13c10499400. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITOL61900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64acc05399ac00c130a9076529fe851a86da07374a3c273d4a42dc072ef2cdc5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITUM72000919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aed7da74052b3ee146e6801c3434ddaea2f30e5da075190202ebc7448212ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72000928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28684c05429a7b128f77b6893f557005a257e6a0f9ff3aa109882fd332e4e18. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITUM72000927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaabe0cbdb88a116c4e0c2276367d0d7396de4884254c14b805b6881e4c6f8f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITUM72000926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf1ec6c63b80b254ac999cb681594e805d239339f6ca616b83aa722c28ae7b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72000929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa9cf988ec06a243d869e08459fb185b9eeac30b476804963fea1773763e628. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72000925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d50c095dd7bed83b7c3647b609704506b60c288155b97cc6d7809e4276907e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72000922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d641bb3a074de1138604f00cc908f7987cb5a3fe389357690a39382c5faff23. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITUM72000923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289b6721c84b537522da85a49dc32a43788f1158abe04cc33e1fce67fb711994. 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/ITUM72000924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0564d788787f31dedfed522ff788da975f2f652c4b21c25870e1a015481e2c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITUM72000920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b57a50bf6b86ffff03c55fe009197718d23dc03391fa4345dea2a98e7e0f324. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITUM72000921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bfd11527825e971a165891282bd497e93bd5cd49a6e4f66e4e573e6ae547cc. 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/ITUM72100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b97b54cd7c2235a784ee40b1170bec223ccead550e3b4e5f6b445503132344f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ITUM72200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf4188bdf05bc2cb07a4729bd77f1d3f8cba00640d4bce7d0f58fd9173472dd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ITUM72200499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fe185364e4298dc905038f288245a456e9f9a3e9e0a9f9c20bcff576919b01. 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/ITUM72200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e68f8f5f982989151da248336e7fda6d0f71379c9131520fde8eb8a11f47ee7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ITUM72200505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc55652534e3087e234f24a797b88a83a6c9bf8ec526650e92b8fd77dda81a67. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITUM72200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c4cc4f2996761452c1023050a94985b715c4a6b6e30e773c334026bbffef3. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ITUM72200512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce28aebc38b34aab64102bfbb502bd82b66251af7ed1ce8a41bca89e2ed3a14. 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/ITUM72200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01a3b07bfde1d0500d1dc48802e1b5bbe5cbc06c2edc3e9a05c36fb1cde6d97. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ITUM72200509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7580d8b9b2032d216af1dc37d4823b2a292947b09a25ce2edcec81460d934e0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ITUM72200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313fb04a2dad2d513373c4cf888f2aa67df9e8e2916ceebd02ad940846fe6724. 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/ITUM72200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74184713ab8048fe31dc565376ddecb79dd2f17460f6b669ae6300397e242e96. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ITUM72200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63494e5634c942215facca4f415d710b4d74ccd0901ffb9176c951a2f29aebb9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITUM72200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a0bfd224ce62f648d4c1cc2f202bcbfd8c8f97aa98d3194f0713073c5c0ed. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITUM72300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ad1aabd3225a5d7cad7de3c8a26edaf4552a8d3a4a1787286c9ae8fbdd605c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITUM72300817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3560fd8a9cea3fd7f2014ad1b749ded434b6ec2b3cd5e6c9a509f8aa197e7026. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72400877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa543c4cc70df65e52b8b84440b3edc61ef41c31239378eb1fe7b562cb90002ee. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITUM72400633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d49dc1ada86a37cb2822ed3def3aef06cc1b816a723c6ddd9b574fb14998fc7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72400696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d3c6f7a9a52c6a1a30d1a1f79e37f0e909f77ab57ce0e8d60cecfc600a8f16. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72400878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f884b960db027849929dfe13314205f4ec110c3ac0362651eae6b2ba0cb142. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITUM72400879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd9bd5176b723377938d1e5187c8246666b2f1684a8d74efabcfb718dac8cee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITUM72400880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7b89d69379625a7313171e3074a7e5a4d3a582772e7f72c5a2a961c06a12d5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITUM72400881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd56a18ff1f60d00e21641acf8a8bdea3647955abd124dd38475c67638249f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72400882.
Il Ragazzo e L’Airone (feat. Johnny Marsiglia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934c8a3f0551c0da0e0a6323fadd6f0b0a5446ca390f37262686d3c0ee91c1a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72400883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f48a6d139e6668ec3fc4ac3172759abf8dee994bf51d9a0296e624e01e4c49. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITUM72400884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb529ead402615cefd1627ee6e0a5286189eda58fba0edd78a43583d4668f823. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITUM72100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9b7d77e3f9d9eebb288d47ba5060f8de4431c57b3b96170c0fe9dd44237994. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ITM3U2200022.