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 0x55ecf1e21622d8bb76ebe8801ed786e3ec34e9fc9a6e883b27eaf70a81248ee3. 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/6a25e394-daca-4dcf-a6d6-55759b2c73a9.json and https://artists.proofprofile.net/proofs/artist/6a25e394-daca-4dcf-a6d6-55759b2c73a9.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 0xb4bdc663b7e81f9c952a6648f64d9cef0f2829c34e7ee52cfa5b8b167be3bf85. 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/QZK6G2144143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52d25645c5946bf5d2829bb0033474a0483489f693c17373955f2fe32ca52b1. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/CH7812217418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b193e8a489f1559a67ae24be07dabee49ca7623d5df41171f72dff219c8540. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH7812240438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3949704e252195b8aa436da67060464042388eab99978839eade549cca3c153. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:01:05Z), 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/CH7812370534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412eadf89e764c0b4223ada3bc38d0ec69f943377226968a25efa97001485584. 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/CH7812403003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabac5eaeba154906222221c137428a8bfcd3a5ae91c92ea7d682c00ec917d96c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH7812404344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5377d7751f915b415e1054fde98b3421eeccbfdd3ada806ee5a5111b1653350. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:40Z), 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/CH7812412530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7be36badd6f4dbd92ebd1f6e62a35ca7c865767f05febfee32501068bdf5dc1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:53:47Z), 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/CH7812417149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f4a0a0e51b60e119710c97bfd8140ae7ed98ab332f21d2a25451ba3085f8d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZC62431596.