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 0x4d29cd7857534748183753da4a61dc3212fbcb09f9553bd51f961d499c4b0800. 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/8110c507-d672-4a97-a4c2-878ca736f522.json and https://artists.proofprofile.net/proofs/artist/8110c507-d672-4a97-a4c2-878ca736f522.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 0x1cea35324c146931d26869f1208666a5679f54d5c59c694dd8de99e9779e7b79. 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/QZPLR2309735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff474b34d026224407fa313ae957031eb4108c756ad5ea6a6dd37c6792ad5e7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTAW2336898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569a45f5d36dc43c8f8434c5a41a7f2ec3dcb5765b1a961412fd2aecb3716ace. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAW2336900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c490fc6261402dcbfc1cc1949d20e9f0d69eb1e5553596ab1a0e971a94390. 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/QZTAW2336901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bc0eac07c46bd71e430c2bf32a9103e8c00202c0c0de06520a030e4f5c9fd8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZTAW2336903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff474b34d026224407fa313ae957031eb4108c756ad5ea6a6dd37c6792ad5e7. 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/QZTAW2336898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cea35324c146931d26869f1208666a5679f54d5c59c694dd8de99e9779e7b79. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPLR2309735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff474b34d026224407fa313ae957031eb4108c756ad5ea6a6dd37c6792ad5e7. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZTAW2336898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7c66a6974536b3630847d4988ba3b9189226c1db5aaeb953002bc2fcbecfe. 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/QZW9K2340011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7c66a6974536b3630847d4988ba3b9189226c1db5aaeb953002bc2fcbecfe. 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/QZW9K2340011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b97bd28268419681b66f75b5b9b2f98558c43b2ee45d232111c103f9daf985a. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TRCHH2200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ee7da9b18f872d3ce60cd88ea7d7052f7ff01773773ac83243959d674822e4. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/TRCHH2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe079a1f985964d7d17b83acc273fad5e2908791a47679f3fa8e035db5735bc28. 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/SE6XX2540121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa53efbcea524235f2e90ad3bbbd8bbf2cfddd2e41b5f2cb335f9f599585226. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SE6XX2558521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335a8d95e8e64da0535fe4240245eaba10f130cfec812fe251c2fd3ae872d954. 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/SE6XY2590784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7239b10717312346a5986a2e84d26dba2f5ed2e9e59b39384ac3766c728a712. 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/SE6XX2558524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe079a1f985964d7d17b83acc273fad5e2908791a47679f3fa8e035db5735bc28. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SE6XX2540121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e40ee613182d0c751f4e61f16be943d5f19aaf9b6ddee30fd737ff031c9987. 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/SE6XX2558525.