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 0x386483d38759aada9948a1c1cdfafd201b7faf241bf8d52ac0e0d782db2a2800. 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/f2a65a30-d3c9-4211-af43-6a35dc5fadb0.json and https://artists.proofprofile.net/proofs/artist/f2a65a30-d3c9-4211-af43-6a35dc5fadb0.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 0xe71add74260999a5a713a4c76caca280ba31117689ab0f594f061fc26eefde13. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282073588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb4ec779ec43ae088b5a82943badbb6c950028b4b0eb94bc92196ab9a6774bd. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FRX282073590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59d077b17a331444f69cb53439d1c5ce5eca3c0de5d4046a61772e4769ecbca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SGA052300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b8aacdc47ecd18bf706e89ae7c7ee0eb0215de1a462fa7b0df670bcd868f97. 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/SGA052300069.
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 0xa7e0bbda79223e0519f77ad593b1e93dac9ef5e533ea23c5d162961b668b82e2. 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/SGA052300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f10e14525899b72a54ece11ae1145444f2fe22e4fafaaac98fee5be27188a0e. 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/SGA052300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304e1afd8f0ad10944e9c18ab01f52420468597b9c6c8b302176f7fb678a6d34. 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/SGA052200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6fa88739a6abcc71f4997617bc4dbf36d3701615373ac5bfab306433473b13. 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/TWCT52208551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979f9f6ac13bb6e677f720f1c2b5cb906dd122855a9dcab200822140ddfe514. 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/TWCT52106067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5157194a52ee8d8267672e6f84eb7038871b49dffdc4d2c9298bd0ca0e3704. 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/TWCT52105381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b6faff4f9302c2aa93c5bea201f5c6c71d0b07b7f5ee43527d0d20ac4aa011. 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/TWCT52105382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c45e60ba86abc50d7f44c227448a5c9f012ef7d1c427cc207d95abcfa04f06. 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/TWCT52104956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdfad72c2f3d99799b8d7c31588983d063cf2f5eb5b7408f668455a5597764. 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/TWCT52003346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e943ee2e0f8b0d0259feb112d5df0a3d28e916ce50eafb4a10fcfab7795ef69. 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/TWCT52105383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c45e60ba86abc50d7f44c227448a5c9f012ef7d1c427cc207d95abcfa04f06. 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/TWCT52104956.
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 0x76cdfad72c2f3d99799b8d7c31588983d063cf2f5eb5b7408f668455a5597764. 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/TWCT52003346.
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 0x76cdb4b05859c8ccd7ccc0906ffd6ca3d983cdfddbe0c46a6a01f8e53d710df9. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR10S1904798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a93f7d53bf7cae94ea3ad71824a3285dc8e3e6b76fbf1f9c343838526b9f910. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR10S1872434.
話中有話 - Live at Capitol Theatre, Singapore, SG - September 2021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1341f535f57f43b176991ba051cd493701c2bc16b2311190406f17009de2b78. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRX452277203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36401f0cf571d3120dd956ea05f6b2c899748721440a7aadaadf7289ddbedfad. 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/QZHN31928575.