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 0x18ddeac46c9937bfcb03fde4d28f3fc7dce1742b0200308bed84a2a917a08ff7. 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/6ed20852-fff6-4cb7-a71b-a9694eb56cd6.json and https://artists.proofprofile.net/proofs/artist/6ed20852-fff6-4cb7-a71b-a9694eb56cd6.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 0xb9b9b51bd7b7835d0480833a7b5543c81e27eff27d5e3120f91bc75f57782b6d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTPX2486466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c0322ecbdfbdcf0f301efbfead006e4929d5bd728121f6a0cf574ba7e4fbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6HN2423057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97bb5ddf9bc625e7fadea192822bdee41a9f9ad205d17ce74c7ecdb3f8ec210. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJY2434313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b28c4ed9e669016ee140241b467cc40e8ede7b64102f8abc6b299bcb5f8702. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTPX2486467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09081a40f507196210b4376912db731898300ba9c4d552fcf09d4043a0cd17b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTPX2486468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b21bbeb7c92254306715ada90400c5e10a42c9e2f8e0b823f11af4de3a1d13. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTPX2486469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd02321e2ff561a4f16f01c489e7d3a8f9b0f6e3cde106c58921cd9275b51a97. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJY2434312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b47f25b0891b14a442485079f71f6b84f250de26e5b9f37db4d3a126c0139c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTPX2486470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9232552013921510c945879d1b322eec7a4fcc2f1ad39c7c9e2224986e919192. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTPX2486471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97bb5ddf9bc625e7fadea192822bdee41a9f9ad205d17ce74c7ecdb3f8ec210. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZNJY2434313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd02321e2ff561a4f16f01c489e7d3a8f9b0f6e3cde106c58921cd9275b51a97. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNJY2434312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c0322ecbdfbdcf0f301efbfead006e4929d5bd728121f6a0cf574ba7e4fbf. 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/SE6HN2423057.