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 0x5c9eee504573c70ef98cdc364d50d3695a9087fceae3513c2ef7b0f6657e3b16. 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/d1ee42c2-7b9c-4898-a11f-80fd62551875.json and https://artists.proofprofile.net/proofs/artist/d1ee42c2-7b9c-4898-a11f-80fd62551875.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 0x64ac1196ab8772743214feec4f3cbe6025482b941e7bdfcebe56fe1688e3894f. 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/FRX452268188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498a51e49122e2ce58705e06a9e3f6b4d4ff26769ab52525c6db9e85007e4fe7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX452242823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc97fdeb020741c22b15a68ae603daecfb4db9f3355e11043b8650e3a778686. 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/FRX452233521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0353c38b3d44374e121839abd1ec6258c5609e2393e5c9d6addeb4f002235b. 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/FRX452233494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8664ad68395e490f3f21ba236a537464176379ba5139779f927dbad5205176a9. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FRX452233529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a5610b9d82d7c9f7ad9b188fc53fb6651f34a963f96f8a27f97dcde9fe63c4. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FRX452250128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0b3454d5265f9758697c27fed0f6887b381eb57ae6fd9d63a949ffdcbe5f4. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FRX452249741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc532b0bcd66d2da514cedc362275dc3faa8a07ec265cba2a50db08c80e761c23. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FRX452249701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee87e1b021d845e32cc31ff6942d42fb7d7d95222ae55f00d7a92b8ccdfce06b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX452273387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2e375af36f628d76d8006e76d933d9f291d05431393179466e8813a67cc09d. 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/FRX452268186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5001681eef2c85c340af50bf44b0b229e1fedeea6a3055141cd8fcdc547af013. 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/FRX452249706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473100a3dbc8ca517d339ca6eec7c969445c1671df07d58104ac9f13228342e7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX452268181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4197a75a05b5a7cb8d300e98244b49e44b5fea57b429d2017f1e6aab6509ecbc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/FRX452268179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e84059697727b2aa140b2fd2700e2a7a109bda5b37e04c5cdc49903a0231e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX452250977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e3c8fff14bb82872de528f4be8b957008c9018ad0a5e73c7374248ed39fea7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FRX452226139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ed3795e25f61ba4c2d44d4f39d73f60f9e5623c9f1aa2f483e842766713004. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX452268146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebff35448fe25f9f18b719beaae25aea2e3c508b541c2adffb5ca4148052a08. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX872290434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0535ef78dcd432e565879786b464f2b355d286bd2f7960ba4f894fcd5d77af0. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/IDA632308127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe5ae9f25101e95da6835f5bc252c9aeb2003761a1904053ab130d7360bc05. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IDA632308476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16892acdeb4195fc2094a20feac2f10f5c946c3f7128476a3ceac254f501a03e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/IDA632308475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f090834b4b41fc1d8e71182c9633ea97eec5efe4e68d333b0a28f2e56c3dbd. 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/IDA632308487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06509b30d393d0ad1166a3afbbcca14e39f5ce3ea6abb3fde591ec4ee33b873. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/IDA632308480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06838130ab13abc019ef289d9d173fa12b2b98e775406a184ebd45e3231624e4. 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/IDA632308474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7051f82f40db3d07de861795ea394d2c9dc746ba7662379e4e0b539e5fda30. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/IDA632308473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf1fbfcd9a5e9fffb522814f26f63ec995ccdcf2166361d1d26b5e6a3c3c789. 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/IDA632308911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda4ad90d536e95e906a1bb0fd1fe00003ea3df27fc0c75d0372aa880f86320d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IDA632310467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc3750868f5bb634e40292199324d0394664ee8417ff3c71ed646ee329fad08. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA632311184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695e8e6d9d3929cd81cab20662de0cc4861e698c2492b9ebfc7eee66cf724a11. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA632311816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d7553ee62838039c513578400aa25a538f39c96d5580fb6c0ccd0a38738a9b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/IDA632311869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826372c2fa66c7a1bce9be5ef1b9dbb6d224b98c81484ed57496e6a98a54fecd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/IDA632312609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9d1a4c28046b11ea82e3868b65a5dd3f03fba7392c2eb0354607a8f5a2cb9d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/IDA632312643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa777fb7945398d79dd7df1517d3974744f6250c0effcfe91a63b9d1dbff50d8b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDA632312704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32228f2585676bd257e1adb78223d63e3c345368874fbc61cf3c02f6a30b6968. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IDA632313292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745cc58c08203b9df65f595faaee9efafcb5deaaf5e73b8852ae2c0522c3f8d5. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/IDA632313293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b59583c985074cd5a90ee8a859f33f577add75bd39788ac0e8c6d94fc935d4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/IDA632414236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e393ca1ed7c793767b69670b2a9057c207b1b686580b5f4efa9707ac600c925. 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/IDA632416981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301b2e63acb09e2486d1a4999ef80b46022f5ea73e923d524333f5108606f286. 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/IDA632417104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338aa2f2575ae8c4ef990a642872738b096d416d1ef7be851f8dbdbe8ac77d0. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/IDA632419103.