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 0x2d60acf39743fd6e777372bdb635bdcafad87e9a32c03586dbec0e9bdcbad3e6. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bf0e0e0-8979-4ec7-839a-512f59bd2734.json and https://artists.proofprofile.net/proofs/artist/9bf0e0e0-8979-4ec7-839a-512f59bd2734.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 0x3aad19c873e7d8536ca7fc7755a913a78b19b362eb812c97ac7eba13a3f9e20e. 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/TWCT52330403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f67be1aa3e2062015cf278139bb85b30f6ac121a522bbbadc7a6c48cbf90e8. 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/TWCT52106066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939aff58b706a57bb33e938f91a9d7700125f6df1aa93cc0620e0e32ed4f9665. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TWCT52207065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330b903e6e895b960b45a928b367cde3eba2cee7ada2a9d5dc227ea9d6c51972. 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/TWCT52208291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4da4c95b0a60da5e56942991c3d0b2bf1be6b99d39779c0f3b0162d7a8677ce. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWCT52321665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999bed74c059cfe920c3f5389d92eaab147dae6a5218ca0ae3757bd3bc6a43a. 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/TWCT52328042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff2925a728531bca9877d87ab5836445245d717349edfbb943bb55dc8d9a92. 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/TWCT52330404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f47ebc6f569f2bed5a4a9f7bb73a5f200015b307800db3e8b43ac6bf15a752b. 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/TWCT52330405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f5ec0acc4dd51bf6063db55bc167c056773dc1973993b908ad5519cacd3299. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWCT52330406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f87618e79ef5ae1baee0c6a86d7db466368d9d64f27ce24eaf0a30253e1fe45. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWCT52330407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999bed74c059cfe920c3f5389d92eaab147dae6a5218ca0ae3757bd3bc6a43a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TWCT52328042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9c4a73e2b1cb722f6bf5595a6d687381c28c6d6ea574537b390dd87c2d1bc0. 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/TWCT52321489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f5499d2af49d6d2f6a6c558814e2c2bf75aaa3d236a9bfa2049f877a544d54. 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/TWCT52104298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed625fc8bb883c0960e9c2574d42b1ef56a01510f6ee4665e192050f88a40be2. 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/TWCT52104299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69addca8096518dfda4f59f3ca5b49afdf6b06fee734e4574d75a8b525c77cfe. 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/TWCT52001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18411f194e1e05bcf87bf3404eea0fa033d910ba63988e8304ca55b81a47861e. 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/TWCT52438572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4da4c95b0a60da5e56942991c3d0b2bf1be6b99d39779c0f3b0162d7a8677ce. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TWCT52321665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508de69c824e6d4236bea6166f8f4ea81b28d578271521bdc36ce6cb102ed541. 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/TWCT52208549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330b903e6e895b960b45a928b367cde3eba2cee7ada2a9d5dc227ea9d6c51972. 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/TWCT52208291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39efe4e76b0e4a2df79dabfc164a6f82d37642d43355b1bc892a64a45e0cc3d. 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/TWCT52207758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365110d00764a6c063e9bf67e3176b68649773ee687b1a746418f3a26f92a711. 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/TWCT52207759.
在現場吃三桃 (Live @ Verta Collective Sessions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db597c0a4d658475cdd760912d0a06e60a927e09d647e4dad19f7c3f8f9ec91. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/TWCT52207760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939aff58b706a57bb33e938f91a9d7700125f6df1aa93cc0620e0e32ed4f9665. 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/TWCT52207065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f67be1aa3e2062015cf278139bb85b30f6ac121a522bbbadc7a6c48cbf90e8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWCT52106066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b1407f3c56eaa63abb0924467fc91a774e65443b4843aa59ae1b4aba3ac97. 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/TWCT52104660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd652597af971fa40bf5d90cc6e4a17e2214ae5e2ddf4699934a7526c87e978d1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWCT52104661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcad0c580dc5c66d490bf070a3f53d16d26329bac7e845af79a8c382144469b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWCT52003345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ff89658d26d127edb5b03c5220b9c66bcdb32bcd1d4e25ab1c83c3df7087e1. 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/TWCT52001716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e361ac07a239c182e7f7c02a1ebaa8ac6c3d5e1f951d8165f46f3f0142b388. 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/FR59R1970222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb711c947b426f059c7769363d36307e61a4292b31d82fcb05e1ded0b47105b24. 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/FR59R1970223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a599cf224d13bca4ddfdd0dd92bf2fd226919d7396272feaa1276621b5192e9. 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/FR2X41957301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbabcebc65e5b1e129a284cd90bfde17c526f045892aa0f42688f48f4ff194e. 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/FR10S1975623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6783989b640e05798d08467eb69511ba5b08c412cf8d8c3a22a67ca73c21c08. 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/FRX201710543.