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 0x44dbcd6dd140a1d5f231c4c7cbe7140c50a01a58ec8e9ad4fe1f254d2f9e3b90. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/444402be-eaa7-4c64-80b6-bcbcbd6bfad6.json and https://artists.proofprofile.net/proofs/artist/444402be-eaa7-4c64-80b6-bcbcbd6bfad6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x36d2c7d61d9ef8e329a0efead5a4c49f0b9ff1940780cac043fc51ec2ebf2229. 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/TWC011101241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7612dd35faa530862d0b26617ce24d25fcf7a75330ada48d138b6dafd745af7d. 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/TWC012312631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78c3447ed4d32c503f937ae663299af5de8d2285ecd637456766cabab084d7e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:37:14Z), 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/TWC012312611.
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 0xb336fbe284a21d33cf175981160e157a456eb740cf3ff540f91d91341cff71ca. 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/AUENW2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262322954552c7b8ec1cb597a89e2a1ee57433fa982562b6ff4247d21146080. 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/AUENW2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250a60a329fdb6ffe1c6335ceb1d1882ed61177dfd2dc90db095e7e4d77dda9. 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/AUENW2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8983104b4694cb0c7a4a283fb82aa68cdf66cceb4b311faf65b60c7cc5048a1. 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/AUENW2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b66c0d2a37932199387714fcc0799b7ffcc5d3ab0c4448e791b21abfbc1787f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/AUENW2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d6d54774d32a0bee1c9f5aa64b186c600297c4063268bdcd725628edb1063e. 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/TWC011900681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4c8dbe8c5bf3e275106ea6b98d1f0f4b07c10d06638f95a348fb10c31c018c. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/TWC011900691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fc5c0e66a86b56557720072fa5f54bb1fdf451472a9bc68d7287e871058288. 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/TWC011900711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8affaac7e65bfc15def810923fe072f6fae55bd60204d6e7ef604d46236fd5a2. 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/TWC011900671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c59f6b2d8d216a6f668fc841a611e80296e613c27d9aef1db0a38203dd4925. 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/TWC011900701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e97bcc8f0882badd417742c3640a733e0707bae5cc534a85552e83f7b06419. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/TWC011900721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09a7ccab2427ea34ec40600b93872fe7ba0f215d0bad3562656fc9f2c1de7db. 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/TWC011900731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6f8cda4cd1efc6ecc7e299d82aaf6a226ea099661ddae5b0f6469803eaeae6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TWC011900741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bec8b97e7d7551878281c4faa8ba32e8d59c0d6318a63a9265a1ccdf8575fc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWC011900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5903fb97768b08d6b4f8f9cfaf3735d58261176c6dc793cd561828ceef036b62. 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/TWC011900761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e09686d3742666f14a8d5cc8359ec38c11e7d733ad9224912566056d20036c6. 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/TWC011900771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91974265d9ace7bd234664c45630e815a01063c46b9568eb3ceca769432b932. 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/TWC011600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de2fe3473e3926575f1006de2166942a1243d2ccf9ccbda0e8994536177c903. 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/TWC011600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1043ad360a8ab07509cf8cfd68d6e946fa17dd28ba991f46a2d1cf50816d56. 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/TWC011600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03610fdc8d374d958b2f4439041857a20a27e47cabdcfa91afb1a53e98688560. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWC011600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f53c0288a1d3731fbc65de9970b75332f88ff46d92d36366dfae81a120fc215. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWC011600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba999d31c80c5fee61c5e4ad5e9b3b0ecfdc4748a2046d637624efa65c71bd1. 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/TWC011600171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9755824a82c5047ca8abcbc08b2ace609454f0bd7f3dc2869111724926381c6. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TWC011600181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983278473c68dfa0447eb039f1a9dbded34a743e90daecf3fb1f69f24bcd6529. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWC011600191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c9aa58b23aa3a5cb486205997e0b71ed743baf0663e1383310b981c9d1d10. 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/TWC011600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867099611912ffcd19550e417efd8999ee519956e158c72fb2e89e9d52b69c6b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TWC011600221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad8e06da50103d5d42de86116af4b9bdef25dee9c84edace2183b6df3ff77bc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWC011600231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d83577386e132a79a5251648a72f72b939a9350777ce93fc118f19f6b321082. 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/TWC012410911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3ea39121b60b6b7550eb87c65125aaf7b3dd3c52d225d0621a5dbbdc653500. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/TWC012410921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef7a11a3617ac1f263bd90e1f1591cca66b1fb3edb455358c3d27b8955143c9. 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/TWC011711291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d456a1d86deb719a14f56c67ba2ca3fdff4e679e562fd6e711c1927a2c3577. 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/TWC011711311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c04be4cb52de73fced7ae4385646053f3dc993a2ab03bf90a9445a115edba. 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/TWC011711301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa185d751adb7c49a6cfe0eb6832f1c757adbf7172ee0b5a799e29ec526a5c76a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWC011502051.