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 0x54ac91162a9146581a4dff3580c91b0db7e279175a5ff9aaff2f3071469e6858. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddbba55c-e6d5-4da5-ab4d-ec949cefaa95.json and https://artists.proofprofile.net/proofs/artist/ddbba55c-e6d5-4da5-ab4d-ec949cefaa95.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 0x812e5c09e2ba748303e5cefb6096704755b535062f033ba51ddb52693a0c4633. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAT2593443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6daa6d083142799bf75ce024ad705bba477d0521b893a86498cbb365b15464d. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTAT2593444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f0ac53de9e54459e288f1faeda0962b9c18954547738d90cad42d3cf3bfe4f. 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/QZTAT2593445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe2d70c1157795a3f0a97ed1ea3d63dfa638f76d9001c9822c382299ee38c07. 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/QZTAT2593446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66519e72091cfdf01c7bde0c6dd127b71bbe2362b225cb9b5ff0a55a1deed90. 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/QZTAT2593447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1b98b6c0f1fa20b02c8de6120f7338936c68fa5493048855ec1937ae2ff265. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAT2593448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f66744e7a3284964938f90010b637b2bd0085c3c40b38e1d318034e55a803ad. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:47:00Z), 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/QZTAT2593449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9069103b704d969ca05007e43746780fe137b1bec37bfeb3c50afd16f74595. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAT2593450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68775c52d14a7a8a3e99bd88b369cc27b270c8a5e0c2cadf26a2d55f7f2cb61c. 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/QZTAT2593451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6bb125dc3fa3468e19f44cfe9f5bd3c2b0889812b9e94aa74779a3f1a81ec4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAT2593452.