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 0x14140756bcc9c8ee3015281ed1d6fda1ad1f2cee33088525ccc34825448fda85. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07e3649a-91ed-45f9-8883-0630bd7a1635.json and https://artists.proofprofile.net/proofs/artist/07e3649a-91ed-45f9-8883-0630bd7a1635.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 0xc05cb8689f955961ae2ba8d8f0412e063138bf325e2885d7fc25fb7f0ebabd2e. 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/DGA052450977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2dd693850a3131f1c660a05bff307a8223b6fd157ddb1188c1567bc62908ca. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA052450978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe061acfa77acc3185881e5aa0308cded6badb955b2ba7f491a7681a97254be5f. 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/DGA052450980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc742d33f77b976bc0cff0a1935a19cfabad35b8a82a6b497c1e9bafd3732d733. 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/DGA052450982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfd73efbb4359d3f92ae4efbe4c2c96d73c1ac36c56573f60ed6f40941e2cc5. 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/DGA052450985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2dd693850a3131f1c660a05bff307a8223b6fd157ddb1188c1567bc62908ca. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DGA052450978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0447cc2534af098b6b8ee2307d8da984a5e7317cba7b2de601346bd4419ef. 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/NLCK42226375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd45e898b43b04313bd428d10a29b2196baad387be6ecdc877678b63258e699. 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/NLCK42408320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472472c2b3b0a779dff0660836331f4abf7820dcad38d8d927d2dd1a5d10ac41. 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/NLCK42408321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44925681cf3bfab22cfd4f4e91cf97d11e79c6a8f09e9f77620288a74e7a6a7e. 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/NLCK42408322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42056986afc39a655e479266ed3c8b369faf578183955dea780a4d72c13de45. 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/NLCK42408323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ee62bdde05c1d5f645a7163291711144c5cd6d98d9a23a4aa8da5add454ceb. 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/NLCK42408324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6297e33c377f29107b4790178a16f93ff33c75397027f596577f076e51f6de34. 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/NLCK42408325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46866f03d6b19d031ae2e31f9322dc69bcc3e730d95572a2f9d0ee22f6da2a4. 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/NLCK42408326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237c4821f452ad49641a0e9a4505e821510131ea3309e17e277fcab1db07bb1b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLCK42408327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6486a40a8e852c2ef9cfeb52a691a05c3e6a5c1a6acc590576a89280c5b8f9b. 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/NLCK42408328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7796304f9426edf7b7f519561ca17a984a15efe45fac6de93a08413db755f0b. 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/NLCK42408329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6179a810a279d25e3d837c38c693a6ecfdf91315325b0cc0285ff880eb78301. 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/NLCK42408330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed32b558adc20b08986372fbe076137f906c4ac0f9cc8445a894af3e79acb73. 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/NLCK42408331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8584a6a7b9e88721853aa795ec3b35d0dc35396be3e001e6a2a4ade16a5bce6e. 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/NLCK42408332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903594a004e21dd28991040fe191faa8abfa952dd4ecd94bfa095a191ff3b841. 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/NLCK42408333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb414f8de7ee2fc7bb1db684617847e80dc7a3c428a2ce535b02baed4f80f3543. 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/NLCK42228707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57388b1c182c3f30bb01b6f14a4ad8af90465955117963bff6d735a48ecccaf. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NLCK42228708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a52cdee3770644a695aeb7c1e49e0fa9aa33c9df41cae3f8c76851d9d3e2c4. 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/NLCK42228709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1924db705a0deda6f87560dc9452515f736a5da70e00f9a43738d587c6cf649. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/NLCK42228711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d262da63e64659dbcc508c51116c527cb19558d4b7e1874f0a477c7cb83365f. 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/NLCK42228713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f21017f73f7daff8212a778620ace4bcbdd946e6af7824ac70f169dd105bddb. 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/NLCK42228714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164ee7b0d69158bbee08675a5b17113594160365e7b724d4514839bf03967fbb. 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/NLCK42228715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9319316591c4244e0ba4c2a580ba25857544f39858361684ef66288d0460c43. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NLCK42228716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afce254a670954797c3f550eaf6bc698871a123780ce9da31375f3844b7934b. 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/NLCK42228718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3404d32d757ae4fb0a0db2e82da4602ad39765005de13a12cb72864760dc979. 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/NLCK42228720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017759937d819bdbf7abc4a3a13dc8183909783b57ab52840d0228cc0c0eaf0a. 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/QZFP52431453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4d9c92074f26c05c8ebbc99a4fced44b7da29c723c7edf9b160ef050777a0c. 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/QZFP52431452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22fdfee1c787bff1eb43b903fa9cc6d4ed01166098722429b61ba8033104f75. 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/NLCK42226379.