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 0xd868c38ae9aae9b41c723b104a7feaad25ffb0400c06d12cc9014e1667d2b8f1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/908665cd-8c90-45e4-8356-69262b90f7b1.json and https://artists.proofprofile.net/proofs/artist/908665cd-8c90-45e4-8356-69262b90f7b1.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 0x3ebc904858838fb3a0ef3a694ec8632560e91004b2cda18820d0456667892602. 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/PL19A2200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995a4e4f5105e92b23f93c6c70b689056f50c2e87bb415e4d9eafbdbdf830bb. 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/PL19A2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10fc4102436b95f8df17141d68d581690d5b5f89414290c9151316e16e7088c. 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/PL19A2200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf825fd62cf61273154cc82583c3a5ebe5da54daa0e52da72bc8bc848c057e5a9. 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/PL19A2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a9ee5f543d4fcf67defdc4c6e91b6716e9daa5ebe24d6f7086eb5b076fb959. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/PL19A2200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e53e024b3f79b49246189ec7fc4d269d37f551eded665bc88a53ee102347a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PL19A2200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4928899d54622824b902903b69fa8e278240acc0cd7b8e9667613f2226ee5c5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/PL19A2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f199543e2cff0ee6faa3f780b9008c0769ecaf66726fd35ce608f48dc5ce08. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:32:29Z), 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/PL19A2200105.