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 0x4cbd19ab3552326a63f8bdd307520fe652aa91a9a6b5f98f2e63970d23ec831e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf5588ac-4635-4b18-8d71-86d90984f57b.json and https://artists.proofprofile.net/proofs/artist/bf5588ac-4635-4b18-8d71-86d90984f57b.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 0xe5e5711d8c5d053cda8216ebcda86b217d608ac969165e6be226b80b9a47798f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWX2254695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653bbe44309d8eb2a46d62000717a8f5a3e4e4171325308ffa91d2edcd756b59. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:09:25Z), 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/QZMER2351378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc581459728aa0474a292ba177fefc3627e2f72a61fbc9ceaad7cd01edc5288f4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N2473779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f28d67cabc2e3298e4eb7ccb4319074e6688e479a24fcc1884bb2756276c685. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:36:04Z), 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/QZNWV2446365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0695581da2eaf4aa1957c19b50fb0135af6c3258a4200fe09d7d15e8727b1694. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFX2471824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f0ba88ed326813adf7f34e8e53ea9f0513c68aad7faf82ed2c03ce3960a239. 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/QZZ7P2412777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60da699add55b428c0dc0596f076e5442914925560bac71d159893b7fd4b0eb. 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/QZES52508549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c9be08ae02c4d4620c13aa1c942e5488c719430b793449f68f6dfc9824302a. 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/QZNWQ2505474.