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 0x99ee1acd4883602e2ea02a9ee8931306579888629940a833e63317870e6d71e4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4d6b022-88e5-410c-b516-04649c8a2ac1.json and https://artists.proofprofile.net/proofs/artist/d4d6b022-88e5-410c-b516-04649c8a2ac1.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 0x288309a49e21809ca26fd5c06fbe3b7e27be6dcfb59e7edbb7d408f452a4aaa1. 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/QZK6P2181508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda009e99b55afe8746d9106cebc0606564ed572f18d777810424050ddb847b5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZFZ42203332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8980df763b23d38631f40939c72119a6d7a021f3777907b31b19a011bfc66a. 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/QZNWQ2246632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea4b7114a33cac546e5a9b702262ab3a7fc053a67afa9dd668075c0e56b0bb0. 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/QZNWQ2246633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556cdb5daaa41e6033be04cb9c60ab1fb1c882897ab7b8598c74bda39ec8abcd. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZHN32241150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa908c50aed5ba15fc183f219378c51d7aad884f818f22e39fb55fd5379c051. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/ATAJ12400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7b5a63595c83fc5da131348eb58dc0dd32ca8fcac88d15ccdeb57bb24ed205. 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/ATAJ12400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d4db39ea5a0ea21e9b877c9795a246018e78e2eed82dba270bafdf2f05af8f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ATAJ12400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa3d95a30965d890b9fea4929e45ea01385ca8ee37d270aa94f161e978a0734. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATAJ12502883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ef511812ba951490c82e7035cef5825d79dc0f19483895c06e3ae04e87e6e2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ATAJ12502956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f84712f8845dfa4a1b99aef3ba55bb8630602a37679cd96d7d8cf48ae45329. 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/ATAJ12502958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d021ba46b7c50f07bf2fe0ea072aae1136225d44e7322d571372fd96fb08f6c. 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/ATAJ12502959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb6a3f558d5198698020525426f99cd095c040d0bea8a4dfcfed67b4982af0a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ATAJ12502960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e352163cb0410e2cbbc2f20e78b73d6e5bd11e357273f6decebd7bf2bb07cd1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ATAJ12502961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59f1fa6384399a239251acea8a19669bcea21095bbf2d6335be2c9343055cd3. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ATAJ12502962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2e3fef47f71963eab6786c766ed131bdbf5859efddc3ce5fc9d68a84e42367. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ATAJ12502963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd815c449cf5b1a9b17eb9686dac4301a8d70d91d8738606c018179f6fb52ee54. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ATAJ12502964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6caf550092c01b0668026d752c1ec54f14175b505d02b262367380b7131e25. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ATAJ12502965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7d2cb5eb4cb907507f1e67b1fd24617e818ecadc1404da8d59f0dd7e3f4fbd. 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/ATAJ12502966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d688ce54563fd3acea2678b7bb73c389530c6ef52fe13cd351e421b47462a8c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/ATAJ12502967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eeef3873a59ffe298518a4121228e700261603e6cfbc8a528878619bc4888e. 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/ATAJ12502968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708094dacbfbd1c76525dddac55422dcd6b13c853869a5af50610a4e49f81903. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ATAJ12502970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ed5f0ba0acc90615115807ab2efb9a0ad534e5a3f3a50b71c4ead116fe81f1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ATAJ12502971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea343fb175d8172c776cc64d7abd30782515424f66dd85bd2c233c22366504c2. 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/QT3FE2507518.