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 0xe4408975162d24cae5b74a0ab639c3e0ff2c78588d2fdf1b02f9748e04feaf7c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e425660b-f7e8-4894-86f4-1323d1ef03e9.json and https://artists.proofprofile.net/proofs/artist/e425660b-f7e8-4894-86f4-1323d1ef03e9.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 0x803779a16894e732ed3effc4fb3012ec5c21eecea4001292aedf6928eff4c8b6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZDA62442078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0cf40ef417f2208b926e2126e30d94755c453dd6c2a3e28fdae8f4c8703713. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:05Z), 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/QZWFK2339634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b67c52ea3bbfa681672923eb2913ca1a4fbbf6e8aae1424fee97b4b1f9d8aaa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:51Z), 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/QZES82468108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c6bb90cf7a0bfb75576a158ad98fb28666666885daf80240f04b756239e12. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZK6Q2496642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ed1b86be54acf0aebdc53c1e151b3bfc8b3f5fdb547c4123e19ab5af6172a8. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZK6F2454637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e574711bdf80a59c75fc7c767155924df2b98bf7457389d24d59e3ba2388d1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:09:13Z), 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/QZMEP2471246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5b15cb636d294c42e4330b5bb174c6929871fe569f5a82864441cc09886c1a. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZTAU2466518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a5f9ccbafa89cd44c571768c5ac63f175d3f7bc94944b2fc3cddc2495e2850. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB42409507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a185676f15196a6666a1d0a12118ccc5633777ad05a36cc03d338b3b07b08c7. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZTBC2454059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82f0a25e1eb838f7fb3684125a6dd7ee71c4900241bf2d88b9388f6835f4615. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:14Z), 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/QZTBD2452861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff343e0ee1535173ed05308a5b2a9395af91e2494342c3d946c2fd5fb03f68. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:22:10Z), 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/QZTBD2452862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8278c7c5251f282210e2e69c9619330c244255b741bb8705f03251e0ee95123. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTB42408556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa89460902ff6efedfa5a32070d6be0955c7a33c420a1fe5ae20010c9a53b49f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBD2452864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0657bdb925142be5a1703dab45f6181cf0a76dc80a9447258ef2e0bcc1e3f56e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTBD2452867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb66a6db72e874fbda53083ba853695634fe2bd7949f7102a21b4223bed1e683. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:52:13Z), 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/QT3F32419650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9518883d664eace9da4ede69d249634f7c61a128ad503092b8bcc732129dd083. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMEN2503500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a43048b7bf2cf991013441d118df0f3c3079372e81383fe3d3f94b7c15696c2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNWT2563946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b91db71a36b7c5828e47f77aa0ef52b8be460651099019211ade838ede4a52. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:32Z), 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/QZPLR2568067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d9c72bb2c074bc2c1e70d915062e7947d66d9cdeeb8e1ca89bcf0f2085463a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:50Z), 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/QZPLR2568070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1240122975996a3774322dd625e8beeb3347d92b475d4f312f7f2a8c5d3ad311. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:52Z), 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/QZTB92543405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa114cf848685482efabaf9d22d51d955f1671f9374fca12ad6bf7da5232ad6ae. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7S2536749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8acc806170a388bcbdb7fae286f8a9f482c1afa5d3cedcd05ca84cf4b6dd5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F22513820.