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 0x526e7703e63227183f69ce475cdd803d98b10eeddcd01c9abf3b9d7d41786c49. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71a31547-cf7f-41b0-84f8-17e421b01f1e.json and https://artists.proofprofile.net/proofs/artist/71a31547-cf7f-41b0-84f8-17e421b01f1e.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 0xd8b116b1fded755406291708d2693a87cc5a3f5e8549bbfca360fd120afedaa9. 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/CA5KR2118145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac5bbc776f607e831042527babda5620e5924b5f6bed73abd2d3933da2f10e9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA5KR2118146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f238103d656b954c35f80052de640096ae27d41addb8b6bfcfc0da4d4c150. 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/CA5KR2118151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0449d7adb7d9a76c8824fc3913c862063d1f37b2ce3f7104b1656727822a851e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CA5KR2118150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fda692447200d39b681e0cec518f9efba2174af1f8829711f0653254b2b21c. 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/CA5KR2118156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2537b7254caa97f854c1aef254b9997ee2b259964dc6cc3054bf6fa0617d495. 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/CA5KR2118166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd13604d6472afe22f4f3b0efab1828d5c24bb4d493cc97c06d4786915edf98. 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/GBKQU2435306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0648f7246872e0df32021785c969af4c67801b74c5622b8aec8f7f700fd45. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBKQU2435308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafec99eb8f1ee457323e05b06eca69e3559dcd7881c098c664b84632017815f. 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/GBKQU2435309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f436a75b4f2efe88f33ba41093919dcba8e006a9dd24ca007ac93e92d157b52. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2435312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df706b3553e55e81d57b0ea753d111cafc813f1decc032a428f7c9385328bdb. 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/GBKQU2283801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbfc27eddcce532deabf3e2f2fc66240178cd70e00cebb22d90ff131a549e3e. 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/CA5KR2115726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5dda326136f3a6b67e4846a39cff0c999420de88ba7769874acb52d097c976. 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/CA5KR2115727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99e1400534fdad39a121354a8e1bea2d3c7a0a9eec27a8817dc23223e970dca. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US83Z2513261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a56b9f793d320eb647a583dc44608aa60a8555d5e15b9fc4b5c380d429b827. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US83Z2513262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33bae0b9655ffec83ceb3a8313d5e13ee3d160991d9858b296a353c661d928. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US83Z2513263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dbe80a5e503e1aaa4375ac014a344678892c9ad893c2b79aef9451550ea43f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US83Z2513264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ce49f84bdd1cde28dee59a7712e88236a5577ec799b5f9bb2db939fe770bb9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLV62319455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa771d132eddae448e02ce6835a7aaf0f81ea1ffcfed7b96fc0f8484207f94cea. 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/GBLV62319457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356fc07258f26685823a263410731dca97f937732aedda95f8f5a2880e879137. 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/DEH742417764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6504e95c6a4ae4a4580802ad9f46fedca57ae4f3c5023d38b2de2186d2fba7d. 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/DEH742417765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e2e630d4fe00ff53c8030962bf309d76bf6b81f9e021248b4b1f215b0b7b0. 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/DEH742417766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b28b23a306002cd67232021b2b20793714e0a5db3f83d9626c90ce07aa950f. 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/GBKQU2419627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bab55e15500ebe3c7222f94ac4eba15279dacf48e6595bd021dcb15f14baa98. 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/GBKQU2418124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b27ad46f6fbacca39c04b18a9f4d9f2ac2fcb41d8dc20bc1f86a6277756cf5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US83Z2349794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f5278af32aaa08b7e44c6ad564d5b1cc17821a1aa68640a78cf030c53cefe5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBKQU2375342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2b4ab0c38346cebc04a683099be48cdf4577892079d58b2856f33ac4fff4ae. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/CA5KR2316503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856ac3967ad7a87e91d3f7e9a91ecda20f8654f113dbc885767cc138b99c1b3b. 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/GBLV62004031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382f11f30f2bcdb57d6fc8a334c99d74d3bb1780c456ab99f891d6be431eb532. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBLV62004036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f390611a0b29b742b920c942c5d3875b41b5f4518923062e6f6155b9ed2719e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBKQU2359524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2fb13912972d569cd5a348bc0df71fd53d915c2973a2fc5abae0828663daa5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GB8KE2208520.