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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cf56c1b333687c8b41a21f43a7826bf61d6b76c8641008053e83a996bf2456. 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/4564cf67-a9b1-454c-8189-f6a8e9e6bed4.json and https://artists.proofprofile.net/proofs/artist/4564cf67-a9b1-454c-8189-f6a8e9e6bed4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9be716a4736282a0c14c7cbb712f3bad1966c8c2168d3da458d6716cd65945. 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/DED831801577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc01c1625df99436c5672fa133aab1b49e1f7b1cbdd6a4d96a12e863e6f8559. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831801578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f727026622353f7e97313fb171748e439607688af117e606724a939d278c52d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831801580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57207eae746e110636ef28f823fb514d7fbfcc103249cb9348ef9f31862e685b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED831801576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62a77e0005dcf85a07c2e98c8ad1b4871a723a201f5e659f4139d66d7efeb86. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DED831801575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704da66ae21d8359e722930a17d25c02d9a426f87ba481dabc6ee22ddefaed98. 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/DED831801579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748509145820c643fdda7f9d90889783f008014cceb65178e6eb6daaeb6bf3d9. 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/DED831801581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27701ee2e149f5c3f657bb968c2b3c186b68c96193f58fda0ffaf46539309b6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DED831801583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a7c8bc83b96d505151d358bf93f55040be12c21cf20ef5d78a9c06096be5b5. 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/DED831801584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa4adbc5f0f6e732972656e032e50c80cbf4e0eb5d0548827e3c27194c16489. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQD61200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e12bcd75355dabb1f077c6867d4bdb85e51b3dcad95eb0a6d3b2b5fea9b2f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQD61200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44e8ffddf9a2988a7b4329d7c2ffc1b4367fc2c0387ad942fec0d9567426ef3. 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/DEQD61200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7591b8d6d6d6c10635a0761ed3f221323a49c565a57d69a7e7b12dc8142a4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQD61200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a9f4e59726a1ddb82a553e9c2ba282e656ff4b0fa65431f4e0d676a5f0d24d. 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/DEQD61200299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea1e3ed7e00326a89694627ef8f1ba0eba427b4ee7c97324abcbefe1a57c56b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEQD61200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7fc6cd92bdfb1835779f6ee3bb7f5599cda6e2abd3a7e49c02ec22908b18ad. 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/DEQD61200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef2f1f1c7e7a4141a8435aa3cbca5d92534749b0bda1556b7b2abb87b6a92b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQD61200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa680a5a73488c1db52b9d9af9b69ad607e5fc646ada9e90dca2879548ae8aea5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEQD61200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb725985234e583836af34fcfbd8fb67b54bac898a76dabed20c2be3f7d8675. 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/DEQD61200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d5e0c6b09ef28161e3b78a67eee941b799bb7d819e69449f0b6f1856e38ecb. 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/DEQD61200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5fd82b07c8ca10aba246bf85c4df0426ee5231bb9c3226dc8a394c4ec59615. 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/DEQD61200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe1f074e5bed2fe09bfa55ea16be3ef652c2c6e06a5d63de0c4934b620ac5f0. 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/DEQD61200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9bd338c29765ab6f8bbedc29eed241ce97d6a3118296dfe3e79f461749d13a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEQD61200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31de2066fda57a9bb10e3c46c6b950fdf7665dc0caa6ffe3558a9b94e8c7935. 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/USTCB0965734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478705709fcf3017f0f931ee3a66fa7747457eaa4b52e9d3b9399c21da1ea874. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USTCB0965738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f21fb272d6a0a052a5494fc89ac62e78d6acbdf4ca7b0bbb0a71d428093806. 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/USTCB0965741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7b2c97e33905d79d3f5cf077b2d36e3ed2be91a9e622855660cb0d29c60c8. 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/USTCB0965742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43b49d94a6cbea53429566202516144b94827a9c53934af3229f37e647d181d. 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/USTCB0965743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8f71657d244a75393832892db410805d2ed1e26f0f87aa8aab9a096ecd9b50. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USTCB0965739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe598032ebabc3591e752875fe7dfbe5a64dfd991ef5be28806934e1f4c816c59. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED832200773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9c6f374b5d0b2cfa0b56d99bc0dce3ddf6084b9535b43bc662bed5369b0cd0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DED832101007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634badd2dff32fa9ccb699e2b0ee78eaa7e5f86647e10396beba82d27a94f6b1. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DED831801016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f3b1b0af5b7ebf1eb93363bd2af261d38b4624ddcbdac8112c056f1b4a7493. 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/DED831300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138ec7e941b21a974fbd026e1d6505f02a1a285c23b4687ae2cc1b2643773029. 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/DED831800497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158b159245a327c97b899cbb5578190cba295bf63dfd6a1506fbe4d58a22981. 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/DED831801021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc6178b17d70ff45635f73c616b1461ef556ce72e537b972c0d0250b4e8489e. 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/DED831801018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec118f01c86ef7e53c1cf81d9905c28f84a0fc250c33e6375546861b5314480. 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/DED831700750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa4adbc5f0f6e732972656e032e50c80cbf4e0eb5d0548827e3c27194c16489. 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/DEQD61200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c03642b7e6f6c246742c897a150d8150dff5fa0ee6cb40f71a14becc526a9f. 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/DED831801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e2223d7a4aba0ff78048df38ea72c2875f3ec233011e7c6888670dca19e275. 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/DED831700690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad97888b9270da258b4e2877c96dc1ee9b3fe4cb04f41df0a5100bc4c2fee73. 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/DED831300261.