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 0xf797362194709e3eb30297105ff182aa6af36e4d05766c52536fc1ee6b300334. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a449e28-57cc-4bea-bf09-4db1c55ca993.json and https://artists.proofprofile.net/proofs/artist/7a449e28-57cc-4bea-bf09-4db1c55ca993.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 0x035bdc28e9b794146afccd5c414bb6bc8ade0faf476425870b31feda56a10fa2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:09:03Z), 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/TCADO1855069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1dc3e497ef02644acf119a8cf665762073423c21da19e5870f7eaababa03eb. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCADP1885670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98afbef650cb1df3ba565d08327ff9776d2406aef7464150f3063a58ca691b8b. 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/TCADP1897417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe964f5cc47e328e09e9ce3a60567618d8b17697fa4dc5239a2941fd5403932bb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USA6G2420003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f7559b64c6ae456c281cded3aec750e11b1db0e2702653d2b9c7fa5a1b476. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA6G2420001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1232da87c7128e5ff1aad2f243344b37775551542870609ec92f37856a54c8c8. 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/USA6G2420005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e99607b108e49a5146d60031c38feffe1f4367af968206b04dd041433e8f13. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:57Z), 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/USA6G2420006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3040f26972873a8d42690499dbc87459c93299d89f9fc52e7c967b2310b8f21. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA6G2420007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0432dbf68cdf5c85a1d8797262c4ff48a8cb4eadb8510a22805266579c881ef. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA6G2420011.