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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6d609ce4e747d46efbab64ebad05ac6e3485ab2eed48f2c089fa850f1e4df1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/991a8614-0e0b-4ca9-a325-97613f2c9cd8.json and https://artists.proofprofile.net/proofs/artist/991a8614-0e0b-4ca9-a325-97613f2c9cd8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6956aed169183d68cb6850cf0b88061e03c7fa25e577d7300db3cab80549b4e9. 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/QZJG52009655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bd0e13592781f370bd1c338fb7cf58e3905284a9939fb4b99df37f86964ff4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:00Z), 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/QZJG52009648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23aeb0afbc07a4611d27efac5c29e0cdb7d3d17a08175d2dbf8d71da180a2e9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:30:36Z), 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/QZJG52009658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4122f26f9e2f0ea1e9c1007223aff5460dc59b771a220e64c34f603c565c111. 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/QZJG52009650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93632f2bf4a072816e61a0d9244b4fe67b8367333694c46cd305369eba5bf9bd. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/UST8K1882149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd532b6bbab7e4494f60b75507642b40f57ef972b191531fbd521113d0de56199. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:27:39Z), 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/GX3Q92404547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdf6c4edb3a8cab3d081849e5722fa142c421a87c8f6229e1661a0200924caa. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GX3Q92413228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a00c2d2d09c7b76e9d7a2e98d04bd69b1493819a340e73bf41b570506b9c510. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GX3Q92413856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d436b458405ecf0b669dc6d44ff68a2bd93699c5f880a73ae16c433147ab9d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:03Z), 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/UKXN22446226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92fb6f0bbd3b5cf3e0d3c0e8e44ac8784cb87af4891664d4987eca4be6b4d0f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:57Z), 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/GBMA22367379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffad346123130029bf7be6a0b34adef42453bda7c2d9b51530195d79127c181c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZDA52172734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a138d29b828e285154f1c3d44ab3094002f1c90e025ec0419870cfecb38d52. 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/GBLFP2196571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee113a3ff954e0dc06eca6d5fd0e53229ccdc5d771c9eecce448ec43e9abaa7e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX53U2468535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a3df9d487f06e42ffcc0343128c71d7c6623629adac39fe495de30750d7958. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GXF9Q2421706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebfcb547a76f5e8bfaea8d73e135236470df127a76a25706adea86c95ac4836. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3Q92522809.