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 0xe2a4c183ccf95f84d87421adbe80768a81970585f71add4f94aee90386f7b999. 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/05c98332-2cfe-47d7-ad07-d1c9bf251ebc.json and https://artists.proofprofile.net/proofs/artist/05c98332-2cfe-47d7-ad07-d1c9bf251ebc.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 0x195b67802810b0f0776ea3d6fbc917267c996e3f33ddf23612e3c223df646f33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJX2332237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b9031ffad8b66657780ce029a2455698bae8b0c961571064db22ddb35f588a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2339645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44356f13b0e38bdffddbb38e741b25f8681e1311a423e8c3a37aa8421cdee809. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2339646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd11f54c37a6389943e346d70158a1d8bb7f1a67f05cbaa15a49a3537bd6d9e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2339647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1704465228e1f871cc322d8c8a54250d2ab67a0128b7522d174fc119125b039. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2339648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ae6f5e99f1457b7bc2904419a46744a2452c345f2edb8ded1d16a0b3dba3be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2339649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe246f55191e60c48d3a6888c229490a45c32f2b0d21777c6b2daaf8b35bbd7a5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA2P2339650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09737722cccc3a94819f29eb7466704a4bf9e2353cf2e523bd08aa3f9c0fc7b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2339651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaf70fcc4b9c337e76835538c2ea674f1ef9dec2e541ffd0d795b7dffec0d82. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2320108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a52b7d884d5fb1ed6a94a96744e745b06301aee98ef237a4acd6373a0d7efe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5AB2315239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95855b33ab875799901b8b81351d1eac9534fea6f6a2b8a88f285c4dbaafa8a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG2312885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60438031d7169f6f7a0033c85d44c5013dee489c3695a39e7ad2b9613bbd4024. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJZ2239262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dcce51c4476663040fd3ef29906ade170f7306bf543c0be86d3df3012709aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2399772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a835da7d78c008460eba3d86c861d096b2338abc814b800b3b1d4139d5716c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2260710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba4dbc6cae8d1c2f619c5e4046ee24ef15ba34f67be75362a0f3a3aed0a8593. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2260713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c73626a7b59d2f49526df091aaedcf48b836c2a84e5623a203baedeaa87d2b2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZW9L2260714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb7ac8861c45b04505d133ec24af023cff293cf36df99f6677f05dc038b1cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2260719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45654c5fbaadb8f61245aa8c9756646054d9b55e74f1e15d6005dd5b41fb61f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9L2260720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ab3e82cc49e1bd2cf929a3b2a9aa6d7b5cb2f806bf55de5060e96f1c3ac26b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2260722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd666b2f0680a3f32612e6e0c640d4697f03567cf2d91887e7115ed71cf4e2143. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTVM2251232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7440889a68d8237eef0cc47db5b302a1da7422fe2bd269dd943f2a366fae37. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN2400594.