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 0xe951fcb81afdf06427827f393a87a469c8b2c2d5a7521e55d7646fd6db3259eb. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5482f41e-41b9-48c2-b9f9-088f9fab9c24.json and https://artists.proofprofile.net/proofs/artist/5482f41e-41b9-48c2-b9f9-088f9fab9c24.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 0xcf5d381c7bbf3b7fb1557629af343f48d261a797059fc32d8158dc93dd943d91. 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/QZES82393361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c6038d3c56848ddeb15a633fc3d1f050a5e4ee10014343469fe90577b1fbf2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6L2308952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c3546ffcd55ecd729d0fc65e7f0cd7f8643f5656e2c3c112e3f9c32b27e80f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:17Z), 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/QZTB22329449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345ca9d8537c3532a0536abe1c58f5e2ee7b1b40ec697eef79fe180855378da8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:37Z), 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/QZHN52433310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd39604d35689f37ba6fce6627154155646f14db300e2fa0e939932d75c5c9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6G2423332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fe9f92ecb779fa51d903f7a6342e3eb9924634ca61bc1dcec1cc32220be29a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFJ2412038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b243c23d0cdaebc1990ad13c83c80e4703d359ccc8e29c87efcf1a8edaf7c51. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTB52508481.