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 0x76e630b343c336c51a21e99afb97c4c3b0cdc8098355ec8e795a20ce055e2c2a. 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/e8896ece-a4db-42d2-8990-09ec13b40cf6.json and https://artists.proofprofile.net/proofs/artist/e8896ece-a4db-42d2-8990-09ec13b40cf6.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 0x546cadc5de109a19be4af1787db18a17ff80177320e94d6e831a659e090e2018. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SEYOK1405079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9cce492b9900c6bf6cfea389675e95228620b19f7595d4f0cba994abecae57. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SEYOK1405080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2ec64b1acdcb9d8e3e46c258f4f2a6a47538533c507b8dc1c10bbfbb83bdec. 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/SEYOK1405081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec1d8931b667e1c94eac5588f63a7d527d2a718dd717532bfa4d3bad708c107. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SEYOK1405082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62f5ba6077d53870587217e4f973e855c39efa962e43fde90084b250104cadb. 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/SEYOK1405083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c99e8467c0735fad1a0c6b4ee2291e3660d0812185b0fcb06c7ed49e48ce105. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEYOK1405084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb7c2a9ecf4cc6ebf4d7836af374e6125035d399a33bd944a815fc24a8c6194. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/SEYOK1405085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc342a9881cddf2553f1a8cb882947e962fb7938dca12ad5c20085158fbae77. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SEYOK1405086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aed16e285784025145ca288fa47b91ce65ed62ad4a982059d2e68e7f7e4dba5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEYOK1405088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b700b73b4f8285db617f6f51f22a98a8627b135a1f7e3c260349b798bd35d33. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SEYOK1405089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aae9f00afca86925c85b25eb96c02b4e0a0d4d9ad252fd39ef6c853f2d8012a. 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/SEYOK1405090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfef1e00ef600be7ea3cce398e19413e339c6295dbf618c2e9fa6ab1ad06bee4. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/SEYOK1405091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d06967a7482f075a15751ed02dbc80aa6105370e2e50be23f709ec091e806d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SEYOK1405092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e82f6d6594cdee97b6de12d31295fab500fda7a0330a0e33d8756c6b5afc8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SEYOK1405093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10e9134064cbe50549fc1129d78ed5cc445102b56e9f82ea5cf9346fbef7ed9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SEYOK1405071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb5d8efc8ea4061f015341520a15f95b2cc27e6813851d66923fea190a36871. 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/SEYOK1405072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7290651abcdf082cafcb3f63157e498b3147e5a0bd8f0d93faaf458ac9692b48. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SEYOK1405073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bbf2a310f8966a1caf3a683896ad8705915f737fa098ad71fc060bde9463fa. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SEYOK1405074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4170247f5a30bc3788c587394b8bb7fa9376b6c6ac2d90bdf4d470e72a0bc62b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEYOK1405075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d7ad9c2023346811b35899e8ac538c144ed0fc166381d333f0922431c9e5c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SEYOK1405076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d13302748ef80fb589ffde978be0625b22eb475059f420117109a00469f87c3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SEYOK1405077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1191b38de84a493a30eece3409de7851e82a8827e70a415d47347135930e05d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SEYOK1405078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c1108054029d9b1eaa0670a97978b33727f04345872c68c40ad01cbf0d7070. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SEYOK2052149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0bd92ea60e1208fc32d3b51d7b25196494f5dc3aeb094f1beb0d4a5cf87c53. 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/SEYOK2052150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec0fbde1fb18f11a86ed2b2eb0529a8cd7958365852bfbbc768bff9c4f126cb. 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/SEYOK2052151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9bce7b8f8018999be22532d23da2123e49f907ae298c0ea77120d0d283d963. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SEYOK2052152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d57b584b07d829f9e485f0f24720d9583c57dc1e00367ee2956c3aac30729. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SEYOK2052153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78344d7ad1c9f6f20f7eb68f2125c1412205b50961f58100f652bdf7ac3d93b5. 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/SEYOK2052154.