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 0x579806634580bdaba7efff5cd378c86af7885ebfea7a1f6379ab4e7f82b1c773. 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/9e64bd60-8a74-4c55-b00f-b587165b9128.json and https://artists.proofprofile.net/proofs/artist/9e64bd60-8a74-4c55-b00f-b587165b9128.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 0xa4acde24b41cda3f8f124386c442cdef6ca5335243ad9014238aa43edd0d9651. 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/ES80D2108001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711d45f88bd3eb1a3f621d221ba8b3ab0a3c9ac84b8b06a1aa62b3dcea83d5dd. 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/ES80D2108002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1754b5fc526a1929ed54a297620d868aecc248b802395850455d54efe3314175. 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/ES80D2108003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453d963cae098a3d5e130462d6581101318bbca1643f0acefa100bb202e8bce4. 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/ES80D2108004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c567fbdbd01589f9e1c127216faab8c0c6322577de727f5cb73744a6dd53ba. 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/ES80D2108005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c62c2f32d8b4725e932f1aea5e1728eb1b2eb520196a83410d3de689f0b4c. 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/ES80D2108006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277666bff2326014d3df96f8012355cee8c416b45f93c7c92a14e157f90498e0. 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/ES80D2108007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8c190d62b643915212ed8e347ad79be0f98a22011ec118c9ccda2be03a828. 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/ES80D2108008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0101d786a6690c24ab3b3f5ead14b2c9ea12c0a7b9044f3253b7f55b77e05585. 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/ES80D2108009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf970b5d3c0d08789963edb7daef44c74d51cdd86b1512a3168b522808d73a. 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/ES80D2108010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f677dbfd8e7b4398a59b288fc5c5a6e677163002daafeeac92c752643b7470b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ESA011901162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0028a93e576aaf099fe571aca80b1f56c2a9eec92dab4e78c28a562ec6832c5. 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/ESA011901163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fbdb5fd2e91bdb384517bbd3ac85311d2bfa3bf181e16e2871d819ae94717f. 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/ESA011901164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482db9c205f2f15156c87660586fb2d7774d0ce6ac7432588746caf7c8df734. 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/ESA011901165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf242fd3332c6d94b3864d762dcbdb0e26d85cd28c0ef4f0d79d6140b0894f3. 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/ESA011901166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6043852186763d4c916673d05289d0bc6f2d1f3afd24bcfe738aa1958e8f6a. 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/ESA011901167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4915d1c215bab5c46a559a9e855a19dd9ad8ec0f43da8834aace418e849e186. 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/ESA011901168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf477b078f612aeb6e40d34297b7f7d8016083de2d42fb210c90a6c81b947ee91. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA011901169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee4fbc7724d033ceb3c0107e9c8c5e075c63de30884a788beb7c66dfcec6789. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES80D2309001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad1d0c604271a3b76febbe7f5dbb3efb5e7d1883e5ff14c78f198cc020d5a0c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES80D2309002.
how2sappho-finFinal乁⁠[⁠ ⁠◕⁠ ⁠ᴥ⁠ ⁠◕⁠ ⁠]⁠ㄏ-m4king0f.mkv
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2768b9c438c0bcc9bb679dd63c32712e646a7497f8316ccf47dfaab8acdfb3df. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES80D2309003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba376e797cb63d9681adc81e2a9add4f1860da828eb9abd773a842e1d22c556b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ES80D2309004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959d7bd8299640b5f979713b7e151963200335a302ea098ea09e22077477d588. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES80D2309005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8c190d62b643915212ed8e347ad79be0f98a22011ec118c9ccda2be03a828. 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/ES80D2108008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4acde24b41cda3f8f124386c442cdef6ca5335243ad9014238aa43edd0d9651. 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/ES80D2108001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf229102495ca642327bf7ac3f59dbe5342951e481593f3289c7d044e3ed85c3c. 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/ESA012102869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ecff3a0945977ca14682d6700427ef590751bfbf505a251861c8d0e4f902cc. 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/ESA012102870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a1ba9e055d8c756e8605d1963237c84235ea2c139d7e4a153cceec8d75c426. 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/ESA012102871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2309eab26420b7bc902ce50560a827d90404dfca2ac98e03a8c8e6de3b2f4b6. 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/ESA011875082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac824a1b93224d5398c8551087747470db28d55e0d2238f2ed3ae5b01104a4d. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ESA011875083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321c53f273faa9259187f0226b65e37174d1cf3836695b9c828c1c7fd773a98e. 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/ESA011875084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211a7c01cb588750bd5059ba6c6d6b8df077b48dda1d17b5ed6334f88db7c0e9. 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/ESA011875085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985225182251ceff79d009e90369a58c592f4e4d65c56c266067973f0b990bb2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ESA011875086.