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 0x7bced9db7443331af08168fc32b7bce28b43a3cff11cf4870ec0ec74784f9d10. 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/18e84b04-6abf-4204-ab6a-e43b19eff9d9.json and https://artists.proofprofile.net/proofs/artist/18e84b04-6abf-4204-ab6a-e43b19eff9d9.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 0xbe6938cdfe09371fffb611a0e75cc5a9c2bc8eb4d61b6070c5ae4bd53019578b. 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/TWCC31901280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ce1ffafa1db2cb08e679326aff8aba3a673c899a6651444612ee07a7c4ec77. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWCC31907181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4f0ee29fae4522a8b2dcc64c3abf1c88798a531278748311dfdfa54ded9d18. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWCC31906018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149361f5ce461b68ca86908170d4700df8be3224b0ff8ea3db8e022a389b8245. 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/TWCC32208041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bffc83ae874795deadd6a6401feea350ce8f37876ff58fdffdb5a20f207314. 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/TWCC32209817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46f0c99570068404029de63ce02afcd5e0e402d27bed6b68e12828ff8210671. 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/TWCC32209354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27eef480f6e7c141e5fc8afc22a2652f1f5e0a53907cfe8c361ab845962515. 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/TWCC32209826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59286f970700e51f4af068fd1942e0261562fc4459f4f590366284ec72bef2b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWCC32201874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007bb54ae250ac5c4b927e0df28303780668509a41a2a8c14e0cbd3f14114c24. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TWCC32209828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce66bf1cddf6afb38732b4667006e6e4368c1cfb2a0e6d3dcee219f3b2c9aec. 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/TWCC32209827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511516644fd18c6c514697aafa90081a7b4819f6393ddac975c5d6c0333a7851. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWCC32209829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb69af83c395825e55e889ba4e0cf20b43be580bf5e0cc3423fdd2a2796898. 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/TWCC32002790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72fe0d03e25613a2258c42fee8d198d8f2f23fd0f12047cf00ce69c79788db. 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/TWCC32003390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba883081787b0468e2749cf076a23d8e979aa155459be7625a356f03d9c108. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWCC32003391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cdf5919514156530f0fe379a14305399ef23edfe83f094c02bc7ad16db5be2. 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/TWCC32003392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735eaff8874c7fcdc425a0cc870d3b0d956d8ed3c5877d0585504fd97df9f442. 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/TWCC32003393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e40b8f1d2f15076fd2d18d6562e18e3b48610e384e4bcfe58735e93d3d64338. 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/TWCC32003394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502d43f1a56009cfc26a570f60868bbfc3cca00774a3e3d295aee5d3ac410b56. 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/TWCC32003395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbfa5e36b2f05d0bc73ac9c1fd06d198ee377695c6b5c5bdb4d98a64c39319a. 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/TWCC32003396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46f0c99570068404029de63ce02afcd5e0e402d27bed6b68e12828ff8210671. 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/TWCC32209354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0e5f28166d7e98ece7b9a3bd3e44fa471f069f93a1fd59b98a4484d223375. 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/TWCC32119827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017f79f0a4716aae8b0f7c562c951251c5b33a9e03b6002b5db76929d42a0a7f. 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/TWCC32108191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327c25d8c8b0c293478c87e57ae789446aa95ac607f2b8296185bf4cdb463c16. 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/TWCC32105787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa062f765d7af9df67736711cd3a99ce63eef1553c3d8543edc45ec8c5bb7f470. 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/TWCC32105148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2592539326925034f427aa10af547541106363817b88bc8bc199aa6dfc9bf59d. 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/TWCC32009993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d57877cb89f7e906cc2207f55f54d4971c1c695656dcc85008e3e225bb94e4. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TWCC32007677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac091b88d7ec6d9d48db134812e59c136468a88854a8957eead7ee7df62026a3. 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/TWCC32007619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6967c44aab4ce27b16d07fba6c55ac9aae8acfa63b73b8688876197ef5f088. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TWCC32007442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fa2c628823d228e2f637c9fc8dccc6b73296a5429fd941b6547cb9309d23b7. 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/TWCC32007679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9a69ad77d73401af1d39da29d75e1a7ff1769d3a7532bdcad9c907b354bd8. 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/TWCC32005753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb69af83c395825e55e889ba4e0cf20b43be580bf5e0cc3423fdd2a2796898. 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/TWCC32002790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff908d723f68de9efb3454c30b0158df23a55feb92bcfb3e99e14bac491cd9ec. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWCC31907134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cf1f58f0f460d113fdc264b5d7cad8c80eee43a75f808f6e31946e6af480c3. 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/TWCC31902677.
月光下的影子(電影《第九分局》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf77cc76e358ddfd55c42a0605545ff3cf40b4af0b617ef136485e73c2ea070e. 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/TWCC31902150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24771749ffd542f9e77cfef19c1a6f52663f4221812230a6b0df461650a9cdab. 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/TWCC31900719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f65a5d7dbe48ef2b360555e4e6ab7b409a8abec6235041b0e663e654c28b6a. 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/TWCC31900567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8ad26f09ef984850ecfb3a850b80746105d861f1c3488347c1ab28bf8401de. 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/TWCC31900373.