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 0x12482c642b31ef122ebc360d0c9080dab6f42b543dcbee3934269869becf9fdd. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e149f5de-f5fb-4b49-aca4-be29f5c235e5.json and https://artists.proofprofile.net/proofs/artist/e149f5de-f5fb-4b49-aca4-be29f5c235e5.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 0xe4a5245673470b2278fbaf6dd31afc7713ba9100ea5a6f3f34b938dc8fd9a76f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:51:27Z), 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/TCAIK2474663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0136f61698226309a3dc5a2f7a9ca68289450df5a699aea8583d38aca666dc46. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZWFJ2442142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69caecc1b912d16215b8082d930b383e7b7462d7e1b7a992fdcccea174dbf4b5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:48:24Z), 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/QZWFV2424037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5bb406cca59b23846eb0ac4d59803fa1b338ce440bfb420fcbf2ebaee50121. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZWFU2485559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfc86fb1385d3e369738a4ac90fc420f747cc0452b44f544b755f57c7d38a55. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFS2405121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5be4f46e439ef7d76cbeb4efbf9961cfd9077345c13c53a09382b3b0fb3100. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:19Z), 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/QZZ782493158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0198c0e301343601c3b1a324f488881f1ec4fa98d75321eb151cdadd7b97d08f. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:55:10Z), 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/QZWFS2462514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817f8151c2a5f83cfd8ab9a5e202dff2c0bc496046143d11f7365cb66ed0e0e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:14:48Z), 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/QZHN42508573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2c7e37b5c6bcd484c67e91c3dcd7c754f8fed538bac97c66442768f3966b25. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:28Z), 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/QZHN82523993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3b1af1f5ff36625953781798ce73bbff4563b0e9ac34c13ca92758641b1ee. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:55Z), 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/BEOE72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612548eba1431446cb291cac6c59a8365796059bf05441c3dec01365ee074063. 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/BEOE72400086.