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 0x53a5553ae081c5fbb79efec20719c498985cd0328a5c01090bc532ee8eacc70b. 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/51bf026d-3307-4f05-90a4-5beafb49f291.json and https://artists.proofprofile.net/proofs/artist/51bf026d-3307-4f05-90a4-5beafb49f291.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 0xcc10159776e151058478dd4ab44c3517c7e962ccfc56e8cfbee0a018600b9769. 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/USL4Q2213731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfe7e4800ec330d7007f4c40bc7b747fccc3da9556b0a9622cb6ba3bb4bcac4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4Q2254742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefafb6b5f3479babd9cd296976ed70915699a07d4875f97fd3fbc38acb4ef07. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6P42399496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e58aeda2cf1cdbe4ee5d6f44213e62809bb9672311ea61cce46cf83e845e44b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMDA72314839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e8b1f00e28daf343071247bc23865bc35285191f299b90007f376a2ded866b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:11Z), 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/QZDA82487549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf767179aef901372db2686e45b7b8ff6f34f9c33b9433913fa95554467eb79f5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:57Z), 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/QZTB42463093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26800a4fe789e72b9bb429689284bfab39b89fbb9bd2b4cc0d1fdf272822b4a6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:58Z), 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/QT3EX2463673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e2ad3dc1c2a71e7b9d9d432575fb6b1a1148880e23ee87ce705906bc8796e2. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNWS2494209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde49836bdb87eade1b9ff04dfa308705a504ee66987b22c864d5edd4a616bd49. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMFME2547440.