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 0xb1c3560986391f9688eaa88003351d814ec080b66fea676479585a7e804e3404. 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/6df743ea-7b14-4064-9ec4-9385db4b8e57.json and https://artists.proofprofile.net/proofs/artist/6df743ea-7b14-4064-9ec4-9385db4b8e57.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 0x0a248316c10b3773068541ef50442ebaafef3dacd4e5e63753f93905a843d9cf. 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/DGA0Q2351341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a184ef1cda9d65929c7a072adb6d934a7d34fc21ede1a812f86c5873466ef. 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/HKG732266555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ecf5140bb1a3be86439ad408f4796ba10fea356bcb8b1cc24e4ebaf8dd400a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DGA0L2374103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab98356a322201d7a815e7e7598e0a80359509420e9d9668c9c98df9cbc6934. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKG731760191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772826003eb7de3cc49e72a6ea72faf1b6ca7b63247a466032818058f1a1c9c2. 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/HKG731722061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8772b014f9743093a67081b25428090e2209c73314f2b765457903d3bc7fa0. 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/HKG731722062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c145b20febc40683e75847db2c88eb9b5b2df886c711faa58832600262beef. 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/HKG731722073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6214d88adfe39cb9159099d09bb7da28ce4c217108f29bfdaee29978118e6e. 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/HKG731894459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469e8aaee99b561ebf215e5d2cdb626e0799d75defbd2727fdf707389e4f3d22. 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/HKG732138483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded8853a000bb8f41bdcfbca3cc8c7285708d004874de92a579e6a0b3a2a827c. 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/HKG732138481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a6ea502d5a5110cc14e6cf795dd27eada2545e8c6f9ffbddaba2cb2b2f231a. 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/HKG732107072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad2283bb3f38de38d5f83bca75360e08c219c6bcff90715d81fcbb070e00189. Chain 2 (Bitcoin): anchored in block 957240 (2026-07-09T00:47:38Z), 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/HKG732120097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a735a6c5f9f86ce197b27caa103d9ba6c6f84c29c66b8f07b3e537a81a98984. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR2X42530557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d3a5a38941d703141009511e079c0eaec488458b0d019ba98bda2dfcb91b89. 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/FR10S2565718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee442dcd21656624f0d2a8056c639c8ba9923fcff7234433f482456a176ca2c. 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/DGA0T2432234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70cb9a86c28439420bd954e3742a3f138d847b3fe49161541de036e9c2d5672. 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/DGA0T2413236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf730bc3a311daba36f8777dd1d36bc67a95e77b8f786fc20075b921338c95426. 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/DGA0T2413237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ed57385775d681261a5f2ea0d4fa5dcc87ee5cfb248848a6f9f5e030502314. 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/DGA0T2413238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a31c59e6c67c920745a82cfed155abe32bf74b4f540cb2b0a26da277ef8207. 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/DGA0T2413239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166fdaf97b0e253a24c2d825a8407d78f2725f66f9ab06f21c0e3f8e2c905265. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA0T2413241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b2fe8b0d0e0de055f7723d4e43adf0af11564c96aa49e4f9ad2cbd7d7c8c2c. 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/DGA0T2413242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf8e47677450f18f123b3e9a3a48922aaa90b4c39aa539d6ec03c09adf98e60. 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/QT3T42423121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525c44a0daaeb472f2950193d098f6d0eee69afd022bfcf04515fe58a83dc72. 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/DGA0S2402209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa118e23f1011a000b37dcb49fa54affdac61fb7875e8d0a36e522ba6e2dcfc15. 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/FR10S2579827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecff14d17dd1564e8b292c028b483d66e16f451db1357b486959ed817cb7fc6c. 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/ESA012478886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06969c8dd26d84d0b8cacd1755b8bff5ad2b89bff84185b2045a039b8fbd34b1. 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/DGA0R2443787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f01d52e6db0d29bace17c49b5d13700fb3601ea9ca8c43a406711e3e610632. 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/FR10S2575977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe072ef1eebf011751ef334e51d7eb529b7caf9caafe860f75a7a1bc76b38afab. 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/HKC992325917.