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 0xbdd582807adaa10ab8e1033ae257f1e8e27762b5f7eddd5d03969c34d27b4580. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab977d6b-a0ba-40c6-952f-688f258f2872.json and https://artists.proofprofile.net/proofs/artist/ab977d6b-a0ba-40c6-952f-688f258f2872.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 0xf9dd20afcbd458e2c963476567efc8ddf9777ca04f8b7792a4929ab04d8e7c92. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT4K52564336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f5bbe807c6afe8716ce8fa61ead7c024dcd83197d8d294160a7c4f02a48281. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:50Z), 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/QT4K52564337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9842085e66270c31d0592020bdb90ce3f6c942eab4e1a8f032c9bc79771974f. 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/QT4K52564338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d419477e7f0bee9d7d974f0ea4e0d20dcd6845a256832175755a7bf3c4683. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:33Z), 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/QT4K52564339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99632dc1e516f732840ae87b0dc8edf826c503f17f649a9498c0e542bad81ed2. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT4K52564341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5cf455282cb493e3ddbd976d28aba771c3c7196a547076fc5a250ece6a8fc5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT4K52564342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeab86fdbc46cedeae5537f0da2c82bdc0b2eebcd53aeda2bdbb965d7334204. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K52564343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fb92e34ba54c059140577cce5228104db239cf72643b14641291973544a30a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT4K52564344.