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 0x63f2aa0bbe75e19f8108d6e16a831d721972c3963f42e66c295a08065aacc7fe. 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/d1ba6d78-9fc2-4748-925a-14d0b3ca77c5.json and https://artists.proofprofile.net/proofs/artist/d1ba6d78-9fc2-4748-925a-14d0b3ca77c5.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 0x183a7bac4370d69c1406826adac41ddd983176667397817e02b88e3be662baf5. 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/SE5Q52002046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b01ad928eb8a7148bf880fd1a5b90bd60b17f5e3bdd95d282173abd39db4e7. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/SE5Q52002051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0441b032fbb74d712fbc8f52cd286b0e4e83e426c130546932a19a52772f179d. 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/SE5Q52002062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231cef4350fd418e7925e1e96ffd35e292e8653caea63c7629e2fe0d839f083d. 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/SE5Q52002085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25323790bff72d94693741db8664f98c3e4e757be7689765cebef3644c0a77c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:13Z), 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/SE5Q52002234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9934b2f86a5e231e09c92a78028dded3339dea6d7f7f1771e0d621e5a8a2800. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE6N62200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e4b3880a2331bfb4b5f694cbf0572b67ad1c9b861a88afe22700882c1a0a8. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE6N62200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb502c53b1876d3da4085bfad9294db4e240235a2d4ae47fce3829f4ebe77c53d. 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/SE5Q52302811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c60cc658343ae8ea7a39a5487cd05cc7cecc7b8f935ff1441df0811a4d7d5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:54Z), 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/SE5Q52302798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa04137860680b5877732a3817c8e21e6e78dc6fb0d51fa200394920ef8be681. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE5Q52500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d3ca61bcac21980a4b19aaceb5f33470fa20473e638b5e1f31094493b65fdb. 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/US6QR2300140.