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 0xcfe3c0c3b58d89a5ef0a29126ba1a14e0fca2c0a63174358ecec82d2b4efde96. 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/cf207dd6-45a1-4988-8110-cae0a2bacc81.json and https://artists.proofprofile.net/proofs/artist/cf207dd6-45a1-4988-8110-cae0a2bacc81.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 0x2927f93419c933a47a36be61cbab43fcf4df2c65828129d2ed8b4248f1c52687. 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/QM6N22552930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073163f9614dd1c19812332582c0159c6144b44a04b317575b7afaf2dbfbe806. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/DEPI82214794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9f28dac9d09dbf7c700e2a06095176d5eedc3e73a5a09cfa02c7b6b0e8c7b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEPI82215166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcad11d968d5bcb63606b1a1f8ec7b854629606c3f371f960e2b48ae3afd1d9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEPI82215112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b49f430f6f97787d3330353487d7dbaf9be4abaf0815a7fba1310409589d4a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM6N22549411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a04067bef98d2d7bab89eae35aece5b3da9e5c0dde327860bff3a2781759fb8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI82214872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3fb1129b3376cda27686dabf8d848e930dfac11e8dbd111db7a9e7522ed4d9. 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/QM6N22547283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0144783bf640a3e7288c3f575ed4a917d9d4ec91a68d30fa493e3826cd7e1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI82214610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7783b10213874a64357c73cfde0926f321613168ad83f4df0932639cbe5cff93. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6N22552867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2718152c5792666cd0aa742c156dc10afbd53182edf202042a39a8ae7e50cd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI82318691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bcb5af9d9285c1c9c45865f67e03d07657581418f89b0c80d05f07fc926bee. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/DEPI82214924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c8047ee985646613fc75c2db39e143373dcbd05101b58396112e54426777cd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEPI82215160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b67074368bbfb3a55c0c857e2cd633bbd3151fcd9757cdb4bd5f0ab6e47547b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM6N22550710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5ba45705d84a75001bf5a01db882b8d626a810a9711e736c06b41d58d01233. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI82215142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6760fef9f4171f372e76e12712472e79696e1ee3be60ee15011e0e682237754b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEPI82214906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d4b3a2de6b8bfb14c1ccadd70f1dcc10569c57064b9402e78e59f8dd1745ae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEPI82214871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b4884dbf7bfa8b2b62249138a54c40f28dae7cef4039328c4e2dafc1ba91f0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM6N22549918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fba4e668909489b9dfe9dbd633f01477336c7a541a5e7808fe37514d1d3311. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEPI82214921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d380aff307f3007b4eef1d62501997cd394c12c06d704834eb71e4ab8d5a02a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DEPI82214846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa275cee1755aa4b0e53a53fe7a5ac52985e6f5baa791a3791a4ca2aa341e5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEPI82214847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de305ae0ce217cf5fc3d5354d4085baa51293abe463c1485ad895d38b3ecdcc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEPI82214915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13719102d4cc1c6af3c8fb4a187af3898ed4135ec50b65bc630cfd92ef1ecc56. 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/DEPI82215176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6460a5e1f2a574c0e145fd983d08b2cca0c1e1f75c32064486e69e0118e124. 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/DEPI82214902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879e2acf48cff3c23418dc9f05a45a65557f5b75cc857c0a34f5b02d67f2ab90. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6N22554749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d5f9d64ae98b05a9997436077fe8863ce371c1777fc79fc3a44a9efac870a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPI82214916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95664a5ff146e9e3873ff2831cc882fed217e3153e0cee257e4f56a34582a2bc. 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/DEPI82215141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778efcd94645d940bbbc57e4f2b438153076368903229d2d925e8b2c85b2fafe. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DEPI82215165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb19537eae3e53db1c18160cf50c815d97c83f68cf2ebf4116042808d401e9a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82215136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7a07416b54b75d3cde2dbf08686f78887bf6f293aa422a4bd6c1610639626. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P42547085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff47398ac597d423d5888104b5d726946b22de4ceb36ab542c6086c8641d2178. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/DEPI82214877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0242e2b5a286a5af8681cacb8ab72e54a1d7f5219019961906d93eedaa1dfa32. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DEPI82200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db94e8a9c182d3254991b56fd869dede9ecae95070725d2e7f02c86cb85eb9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEPI82307331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053990585bc2d9bfe7b63e3a13422957a959382f22ecb0527202f4e555bd30dd. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/DEPI82311823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9a1af5cd3ed0a900a4216a7a8f5abae096107aafd71ef90ee1408e2333a479. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DEPI82319699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06be55fd869e2ed18e7ddea6138525eafaf251d580e0db47760e3b4838380ee. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEPI82320724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b6af787eefed211908a59a39524a2ff75f3f1ea72b04955369ae1c55f6d2ea. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEPI82441113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b953d650b70dfb52ae32669cfc87405c3e6de39a2f4d119c84a037232a46a7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEPI82446454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee306e30677e8140cca33ef2aaa9c5226c298ce2f51ef2b40659977fe9e32883. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/DEPI82522811.