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 0x304cc588bbf8637e723b01eb564e38fbe1e251a44b0c8d1ea5d74473a4f40b8f. 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/d94a464e-3f6e-40cd-908b-eacc7acfb217.json and https://artists.proofprofile.net/proofs/artist/d94a464e-3f6e-40cd-908b-eacc7acfb217.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 0xb8c4cb9938a9989712ff7021e2b20ee630a549208a24fa572ad3357f8feb2ce4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG2052120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39f3b9e3d78f5029211685c510cfcb146a989c6922f7e15c6b65c04edb9e3fa. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:30Z), 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/US7VG2004069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dfaabc36f4520754787c5d37225d5c3f2db20229dd6c10f8a00e164117f06c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:02Z), 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/US7VG2004070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3794cf8a2526f8d91c3ebccb75b4516fa48e30e268572a0cfd98aed26f0cb94. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US7VG2004071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d15b80baef8f8e1aad86349f01a6610ab9b02c2784266191eae951174c36f3. 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/US7VG2004073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0f7d3adb746131b851683a7519f78e0e3c6bc3a41c6480e2747286163ad569. 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/US7VG2065707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3f211b3e306f6796b9932e9e58dd8b34b5a76160336ebb450b6dc99a347643. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:53:55Z), 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/US7VG2008379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b468cf5b3e0be6d89fc7d945a3dd63ab8d6ee1dad6f87c01f65b529d24fc90. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US7VG2008385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafa489e196cba8171b36c5906708a867d762bcf345c60ebc0235818a8842a08. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US7VG2073373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d673e5a345c769663985836735721ae1171798b8e88dd9dff6f7b0cd0af599. 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/QZNJV2383763.