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 0x55f9f7022ee981099a3609cee977ef6bfeab7bfcd05f47316b2eb3abb0e75deb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe872bad-3ffd-4af6-ace3-2a62ef326b42.json and https://artists.proofprofile.net/proofs/artist/fe872bad-3ffd-4af6-ace3-2a62ef326b42.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 0xb0b0271a08eb6e17ce711724a61789c3b5dd3c6e09a967304ddf1ea7f82bf7a6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:54:09Z), 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/QZHN32266140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c63fcfc88b5f077541fcb6cf92dff460588a570a66ae1d17350f1ec9380035. 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/QZHN62229091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164a9456afc84646fc1bad57af1afba8da0486d8e007b1563a429302cae132da. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN82279933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0a539282fdc26ac8d1158afa22f1439afa2534f4a8c7109308fff5e3f7316b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:44:36Z), 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/QZK6M2233438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51116eea0d3d04f31e4f75133c6a715b9d3d4ccd1fd83fcb60eefbe826d19aa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6F2236371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125f1b7fb1eaa85f14c1345f562cfd7a88e7da1bf9993c3e51ae04e26bbdb77. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:40:50Z), 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/QZMEP2225477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c1c075e4e759e621ebfa652e163e8ff5d7bf54896cb874ebf046742ec0f9f8. 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/QZMEP2291327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d6020f6f280e5be3fc9ab2925f1154085cb02c99e2763be379f69c6c4fd90. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:49Z), 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/QZNWY2261749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bcbe6daf89bef13d3cc5632fa0cb283b1819ea29d66d212a4b7b6bcebab9af. 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/QZTAU2259944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef386b2669ec26b66ce5838b5f5b84a1b8502258ccf1e184dc5e6ac7041a0c. 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/QZTAX2292353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c64e867842638367b6bfa5ff37a8dae844e55600e5c9bc320c31298e4ba9cee. 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/QZTB92253869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33d759f1a33a4ba59c2e15f5e0e4bd92cc23d519aa179b736704e8cd0e124f9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYZ2352255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f7f19c85a69c0d6e19eb9293617bd41d55d6c8052dc00e62cc2420baa9d08. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:19Z), 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/QZHN52360141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f326c67c6c1229b451786b14bbed864652c2d2ffb7de078e92e0ba19d8a292. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:50:21Z), 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/QZHN52364609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bfb2ac22179d7777ddc8f4e15f77f0a8b5cf0fa6b07424a77b984c96998a53. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:37:11Z), 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/QZHN62335307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46b89aadfc09378924f64030f44c200bc75749b81eedd8e2593d9933ae09c2a. 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/QZDA52387631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bed1d24b102ed3fe51a857b0e987396acddd04b7d98f1f13c530011f6dd08a9. 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/QZK6L2348621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cbf7401ac7e818f09c08fa3b2d6d09ae5819918b08f5a5dbb73e0d6ec91c20. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZK6L2348622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b051164eded24a8a154d3cc0c548b7c005a38aeed5b9b934ac3837583cc8116. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6L2348623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76d4e3a73b2e5253d4606d6e60ffc1a3132e7b11e98986495442af01e1df52c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6L2348625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98ddcdcfb21c6bf93f07157382bd17cd58c15376fbeeb60021720aa9932fd40. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:23Z), 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/QZNWV2389547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88b3d1f969e5649dd0253431b0754915e94404af9caa7ef9aec99df10a8fe77. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNWV2389548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88698f2f1f5866671c1efbadf40a45ac1a6a07f745e2c25d1dd057e39209fc1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWV2389549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b212bdb33e8b5f3c07c8d034dc0e345277851b6a0eadc545bf385d6f7d7250. 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/QZTAW2362070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebe77a19112e268914dc6baf04a021f42b3f177d9923b070c5bf2352352eeb5. 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/QZTAW2362071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0de1351ec9b960a38959bed3e7d2bd22e3804646b92f3a28a8da5a9f2a2f03a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEP2470370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b81709e789d6bc3ececf827b3912c288643c26049ce6b79f47066ce2f5a63b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPLR2528169.