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 0xa0b31599ec43a8ab36dcc2ecf4f33c99cfd41301ae34489fc6b1703694a6ef6e. 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/b67635fd-a33e-4ac9-9e74-8d341e06fa83.json and https://artists.proofprofile.net/proofs/artist/b67635fd-a33e-4ac9-9e74-8d341e06fa83.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 0x35ab9cfc86fd15362034d15a7cc88e4fcdc420d3f92ccc58e3fe41c291ed47b1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMFME2091335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787b2ab78d0a41ef4b3b7ba8acb1a9a645349919841dbd0ecf5dbba53dd01647. 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/QM4TW2173555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7910ba463bfdb7e1e5279b89676a94dd8c43be59238a8eeb028af0d98172a8f4. 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/QZMHM2287371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be5e4600916651e2c39c48e408196e42c5cb4e2addf11391b2259b437872d91. 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/QM4TW2404162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22bb6512527cf42afd160795140574138d4e67a1972a73b7222c2d5eebdc6c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:17Z), 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/GBKQU2533127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b945fb5b35abd60bc7cbd3ef45c270de01299fdeedf97afb9c290eaec377b4e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:01Z), 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/GBKQU2533128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4892f7f716c9a5aaa1cfd8d666e8fff02e23e04f7f91bdb55251c35996511e0. 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/GBKQU2533129.