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 0x31444630d3846ea24ffbe6f58b1026347509571df91e05364ca2c092ae697e6c. 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/5d879534-4ec9-4462-8fbb-0cac709627fa.json and https://artists.proofprofile.net/proofs/artist/5d879534-4ec9-4462-8fbb-0cac709627fa.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 0x30982de991fc9aa0d4f3e558341e9e1f0cd446fd7b402ee7153afd728bf7876d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USDHM1919433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc65f8d64e90b9ae1998c164b81573a7f3d8119f2b4e890957343366e2a0eff. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDHM1919438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd74a95b4f8cc33e26668c718563385b76fe8e0b6c13a444d295e26d216d315. 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/USDHM1919439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7146c59e000c4f9368a25a4160d0e12dc36f68053b244bd4b81b49512c2afda1. 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/USDHM1919441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad916eb842d6ef4857f7cebb4a40ed2eed04ec7b07fa996e0d7109b34c7bc348. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:51Z), 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/USL4Q2166662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3d0e69ca933226a06609a6490e48c17cdc0616de9d2fcf2511514bcca0e865. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:28Z), 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/USCGJ2242887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3e28c1624126d09ac656e0871a057da56753940d2c7e5213ab7424cc3a6721. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:53:51Z), 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/USCGJ2242891.