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 0xbb6849e47a824b219666c45393a9a70467fb2858b752c6407ffac3ddbd445e76. 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/ff84f239-4bbf-4d71-bce4-73dd256464a8.json and https://artists.proofprofile.net/proofs/artist/ff84f239-4bbf-4d71-bce4-73dd256464a8.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 0x1b1ec7e123e1adc1967898e1e251e59ce027f020401091b26d68bab964146cea. 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/INT982335648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae4fa03bb04860744746fbdec0de18a033d60cb2e7835068a3da8228529144. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:23Z), 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/INT982335650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3be04906426bd1524c1cc9e4757db97fd2c0ae3081617e447daf8f25f23c6c. 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/QZHNA2476269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135b08163c741fe9e6659522c3895f93cdec22a940225691ec5bed7b60cef00c. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/INT982421037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f37b2d4bb79735432cb3401485863491e75363fa3338fc5eb2c74b3bfc297a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INT982421039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b98dc5a8807b2573b484c52b4d64337a945b45d5bb6aeeccf2010b0cf59b7d. 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/INT982421043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1730fcdda04387569a60ef96a6996228abe468f06b950c7afa4c02f78db279. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INT982421047.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee736a98a51961271357e13f730c47a1e7f6500507c5c66d568dab2d32ac959. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ62542101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb14c59bebf20f8a5f6370baf4704ef2f584ef03542c0ebc2ebfa8a8e6fb10. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/INM1Q2501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbbb9d3170ae0034d2a0763228f9bc52ad4a7616f79b157566c4adef6eb5ae8. 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/QZK6J2539095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944f89f7bf2e8059da4e8e5b74ea85c48563060c4f553b336b3af36f6bc11cb. 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/INF272509466.