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 0x3503c39c2a14905785ecc1fbd5e2fcb6cc03513e8ab5cc175458fd8912f5d89b. 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/8c591e36-95b5-4dd7-8553-f80ca9a41b62.json and https://artists.proofprofile.net/proofs/artist/8c591e36-95b5-4dd7-8553-f80ca9a41b62.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 0x9b994601def4b70ffc1c56be3accc5de92f70d90003a24d7f5654017d85ac28c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN42087040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd769dfbc92ebec84ef12d4a7cbb691ae20f2f182f8108682c7f1ff4342b24e64. 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/QM9A82000738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776449843767700f75303c863d38185ec3195a2aa4538f70eda9606f04443d92. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:32Z), 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/QZFYY2310343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7282acad4af80391742de789226730b33e3ea07f9fafeb05f7b5a644efeece93. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZES52325894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5545bf09b7f301b2161f9da2a6ee3656ba4538951511c1bb9b4d3c132e529a9a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:03:22Z), 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/QZFYX2463303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0eaab0927432466fbe1340be966763834a172ddb581cb5d52e32ee51c8e5900. 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/QMAAK2405506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757cf0ed223d6e1d0d771a794415724d83c2d0c0f7379b6d1d0b57c99cf6f9cc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:41Z), 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/QZDA52498670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcebdf2390e2f307b9e4e6cac973a1d9bd3344fb88e822da32990a9a88a2cd02. 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/QMAAK2405509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875abfd848ea1a439bcb475abe65057e419b179c87e1ea608a6a1ee574ba96ba. 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/QZTB22450481.