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 0x3f1a54444f7484cabb1f1bfc5a0d402615ee71208b29a243632597ce9a7e1025. 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/3ef4841c-1019-4864-b318-20eeb8677824.json and https://artists.proofprofile.net/proofs/artist/3ef4841c-1019-4864-b318-20eeb8677824.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 0x199a29d0af6694c0b2e5060a178fafc7082b1874e6472ea3a55bb4f38dad03e4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:57Z), 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/QZK6Q2201496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32b1662803fad7d683beb4dff00f3d6e390c33795cc6072a33e28aa96ac2095. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWR2202660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230089e38121dc443ffd176b1a949267ea684ab7a29d282b263a2c764d65ed7f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:41Z), 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/QZNWR2202662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9649adde3ef52d187b88c78e956ddfa57688f637a185cfbcd822622cee6cb5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:24:06Z), 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/QZNWR2202665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76853338dad4dc0121afdd84fb37d955ce3442e308572f0f0b39919b2a3f1512. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZES52315774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603c75e76e8ad4c372fc105a1fe87c114405402eb58367b8002e112a01d12226. 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/QZTAT2334885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b630400696c553deeb50de8ff3725244fdce117c8447990bea5fe31b7810018. 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/QZWFJ2358328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42fe05e4a7679f9da1eecdccba166e4d378eb6e70058a61be49405dcfa16bd8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFJ2358329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5ca4c93c19b4e07d829917718cae085d846bf611c052f2a4ef8549b5fb35ce. 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/QZWFJ2358331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c0398654c47e7f95033b4884f559d18865b1ae47d776c07ca1d8a53608064. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFJ2358332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358649a23fc2956923e7e89509d0c3ace985fe727bff2ce397adb3379b2cfc3b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFJ2358333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81fc0693b91eb12b15aca66178bc7fc743f8173ef354c28f3f1ab15742f115a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA2458773.