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 0x120685c5a0ce5552d15295812cfbc66382eef46bb38c567140cb113363201bab. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2e9f89c-f00f-4218-bf49-a9f43644abe7.json and https://artists.proofprofile.net/proofs/artist/b2e9f89c-f00f-4218-bf49-a9f43644abe7.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 0x01b513d31afc72e57e23234274b9a2610210946aef4fb0146b2b294404b1aa50. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR96X2111740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21fd4a0ff90d6c38bcc714d783d4558df74875200a4d90f4591de51161feabe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762177997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63edf75277c6eceff572850fe53b0513c8e730b45cc85a4501ccd1a7e261cba. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:43Z), 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/FR2X42218135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dd66f21e66bb09f2ec32ccc9095248a11b42226a4f9f6fa444827563508a3e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX202265545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b690b4ab2590a61cd6e695a09d97ff02fb50de8ef7935f5ed0b1f0536c394a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR96X2344892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8676205f5426c8ebb6a8e9e1f2cb2820fd5489c14c2ec157f3099ff9a45f6475. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DGA062306922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0646578c6f6a3f6dcc6c958d3d35f42d111bc5b0488713abc25b7330185f2. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:00Z), 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/FR2X42480084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497723100a26d5d6c000cb821d6f3f1dbfc7676c9da43c5258f1b855659ce929. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FREQZ2500030.