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 0xbe69cbd0e35c6eb95135782c1918a0f4d357bdde1f3b659a678f2b4f67e3891a. 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/c581d199-4a58-4ba3-8e73-f1b45e8d298a.json and https://artists.proofprofile.net/proofs/artist/c581d199-4a58-4ba3-8e73-f1b45e8d298a.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 0xaad72fab27510e1c8c5d4e82e4b25cba9af8fea0423c743c64b22abeb521cce4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAGJ2224435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9141708dd6615c154b083f2cd23f90c4323d49cd44675723531617070e2e652. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGJ2224452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7500a90369ad8557f4515f4a1ca25190a3d73132015d7057bea03d2b82d20dd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAGM2216704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e5725abdd2dfde87852e1b903e6f454fc761403ac2b67f6abdb8124f039bfa. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAGZ2316183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b9e5630634b01a39ead4352d738eb7004ec6b74e18d65191ae17876f5b8e4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAHB2308119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e756a9468b6b1074ce2a26cd802ae40acecb709f353db5420948da2a40e1e3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCAHC2341912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c89a9e3417f73d1cae130b2ed0a583f64d078b9ca13e4f67d847e9c541997a9. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAHC2397481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f5766f870ed5c9b0d7b5b4ea0a123814908afe3a6b11d03b66de448f4853e1. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/TCAHD2375761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c59b0e9862265ac7f9f1a3c643885e52650add388916849618346e856564b3b. 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/TCAHE2390067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9141e196a0b5a8963d37a4851a49e67a4e581e5a53549099ee7ef9cffc54ece0. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAHJ2322843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62bad279f1720ecf50f066977b498ebf8c6d88aaf4adc03c1b496ab8b0e24f2. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCAHL2376312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e914f09992b382a7c7dba0b65004782c0d8839e2ebeed0e4dc60a0c4ec69c0d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAHM2377273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82928eb0961cb5b2eaa3533bc6680262dd97d3f241350f1ae4862c3c1a354c50. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHO2300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2c22837ae3f6b76a64c7b6403e10b0ae04dfb248e21c5a19cc607c6846b106. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAHU2406576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fb118a7722b3e2d8c0ee2ab738f53f2f3cbeef8651e59a518992fefa0c3a1c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAHU2406583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01e237f9ee9c24754d7fc1c0b891039941e9ddcbd9a4f3cd2b066a413402ad6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAHU2406588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3079c196d467e754da4891b75a5caec981d18df1b14c3e7ba89f3c3aaaee1409. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAHZ2477841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b74ce68558dd7cf4f901cfe23307ce5416f3af9c96601ba98fb3ca9c8751fd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIA2484668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966c48677d5eee2b4380b3b71d639363ebe36ad9e1505926a560c822066e683f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCAIF2459643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a65a24fc5f7140655de0f68fe299703f8d4aa64b877f223020d70c94c614588. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIQ2463438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e8b715e4970989e8d278d7e6816e1c86bd9df3c099ede0b0a86e93161529d6. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAIS2429565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2c33b802f6c3fc3566c685dbfb9ad39626e53bc79c2ed177ce24c163cacb7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAIU2428848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e06034d5d6ffed03cef1fe45992b985e886bbaf92cc28e390c12ec5e4bf3c5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAIU2477099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fd304e765261e25a1e2738ea37701631c56eb24c1931e23e0e1935f92f0e87. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAIZ2438182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab079a29e383e9da83e7d223126fd92ff393e9cff2c11360cd3f1c10ac768a8f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJD2480732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d7d511ae9d5ccc1652905a94b542a6a30b90c13d453e45e225e4341d7c65af. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJC2488709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101468944cd973233344ea4e25d2bf657cbbf24ae3d256d48f076f8045c89850. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJS2520919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a702b6b0c5bcb9aa3a8dab2bdf803d3f24863fd2ebf4edc9c4504063c29ca30. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAJS2520947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759984a1924edfb47d4ca79d9851a50597363e858d69a97987c07a9c19c7abe3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAJS2520957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c29d03b6e166291e154272e0288022507121193f78aecb8b07b75dab0786962. 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/TCAJS2520965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551da33ea0f8e2ce6d937a5d7c427fcd1aee969869abaf226aaf346e987ff1d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJS2520971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3f457607397809f3c873100708099a7715c1739a1de0a1a96c529d3370446e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAJW2558198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07802e838d3fc458b42a93d50952fe2297361f13f15ce59957bc902d05fabdd. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QT65Z2568751.