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 0x58303e01b2ed869cc49a21df73c089695eb6f1d9059b936dfc1a123cba6826e8. 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/00302443-bb6a-4014-9622-d004f16d5f85.json and https://artists.proofprofile.net/proofs/artist/00302443-bb6a-4014-9622-d004f16d5f85.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 0x93b69aa55fc05dee7669354fd82f65ba6ce4ee58b89502f9b9e8750b4f6e0198. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FRX282417263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ec98aa2375f3989a02c8e77bd8560e84a6ba5c264f8cf3c5bc1bba8dbdee0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX202449564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980ab7a2bbe61b6b83cb23850ec22d79f10b2b773351489e47710227771b8197. 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/FR10S2403248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dce6ce21e60b5ceee3867c6a606325682bf7811a0f6ddab99d71244b7ebc45c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DGA0Q2372669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0914679972cf61ea5d39aad4ef2d76647d95a54451b2c28dd45975e6c6446f2. 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/DGA0H2388219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed60fd2cd8e099824fced62910b1b142cfb42c9ec8d7f5e619d2523448fec79c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DGA0H2318466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6453394a6bdb01a96d63ad059f036b3b2104dd0570716cc9658f5f271412b14. 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/DGA092371565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ab1b7c00a5acca99c2b333a7355dec6a16272949374c321a31195a5edaa2ea. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DGA082397391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda58aa3e90cc26868af45f48ae2ad7d941515dc8c96c72f11a23fbc65780fec8. 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/DGA082375360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2af23b3746ecd6ca0be9ec4e5568418f39f8b58b7348a6ca70ef82514b8b95. 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/DGA082373888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e87fb7bbfb11dbc219ebd12192c636e4bcba596eb671d9b1e799481a8f88fd. 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/DGA072389081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1704924ca1314bf210ebc8508145141f553225153df689665c1464051577e313. 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/DGA072339209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5ed270ce05331b8d32caa8acbaa824dbda5e441c56c19b6e0e712b09b91ef6. 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/DGA072307714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70923b1cbedfdce80db7aa6bbebeab52dc3976c913f4ffcdce4081f7e463eb55. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DGA062312150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b58dd7f4ac26fd4ccda1c13e796bbefe244872b72f6d133c4b935549f8c8f. 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/DGA052398443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014d5f72a70c19af67585dd1d78c17ee446f61f652bb9070071d8077866f88c. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/DGA052388246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983508c2b5a28e9c78b0a12e106a2669048e3e07d4b0800f6926084322e692cc. 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/DGA052340091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7dff35727a77a7c9d69d482350401a2a008fc1d45a21069397f148f8d45427. 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/FRX872393210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2aacd25f74a9d29568096093352ad66f636d1ddc944011a085556a03d3800. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FRX872392898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77626333f9ed3d054099e85fd62f7f29c7d5f22356e4c458c5a08d4b63b79d71. 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/FRX452392866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc020e574a2278bd8b6fadae00c9139d280f42e6d1426910a59856461baab878. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX282305774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05118f25aa660e52bee933ad989ca732acbdceba7c94bfc7d2dcce4440fdd43. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX452398746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152892a764e170dffab534bc2d2e620f97c35e282c055b5f1ca5284fe49a76e7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG731622169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1daa0abe53235528bb9473b7dd20f062330256be1f2d399b674f70ebc0e2b1. 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/HKG732141661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8285f76e8531feeb5644a108d897f01dc8f08805ba0b5f2cf2b59ebee192547. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FRX282186665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c482951ff04ae3668c871d3bcd358f834f4e365d033a5181190beaab8e180cd. 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/HKG732140464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e5702de1537a127df4d0b11b15feb5d1490e4116cce123b80c2b1ed22f7d23. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CNZ632100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6342e124ba28844bf085b0986bd8841719d31ee49b7e31a7598d4b10252871de. 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/FR59R1855441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a26ec8490d2d25474fb3526d2c5a0463259c0d98e1b43e9975205c0805139. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/HKG732104563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd859ca9ce55d25ecc815b05cd49a227992f31d3702702b16e6cd0a90d1b02d3d. 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/FR2X42153058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab9d7a726cf77e3483aa54e696672f5ea5962fa8ff06054ef6b0a6664278634. 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/DGA072148545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df7c8bcf1ba919baa845fa05990d279ee190af4ca17e4bb6c08ff4ad4ece504. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKG732120100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bef5e48568ea50ef3e87e016257b11f01033cb006a6c1f969ab5884032e782c. 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/DGA0P2464638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98019c85bf5f988d7b0603f0faad6556dd1e5a16b5d3f5086e0db5bee99563c. 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/HKD012373672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaa3d213487273cd431a92ce22dbcbbea7fc1994fa33af88c1c4a0d1a74b127. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG731403714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d99ccdc6a45bfa0e3bed9efaa0368c185727d6cbf5128f79feca6ecac30201. 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/HKG731403716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f6214ac1ca3b632440103652b08a33fd395f564c8eb6370dce44892405e35a. 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/ESA012500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5909db303909c4854bb68bbb4bd69af6b2bc7a2067f8afa047af96e386f35b65. 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/DGA0Q2409617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824474b3464c7b4e8afab2d1d0d017ea1c382adc688e94adaa268736838cb296. 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/ESA012493929.