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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ff771745e5e03d640130a67cbebb5c29bd2b32c0e101da7271a7d4255ea96b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/058a9ceb-3ee7-49b6-9b27-f76786715e10.json and https://artists.proofprofile.net/proofs/artist/058a9ceb-3ee7-49b6-9b27-f76786715e10.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc84ec1ce667a9d67d8dba20cb5646a117e4b504dd14e01cad99c828fa149771. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TR0012100581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787b0e2830203f4360654791fae94b43fe860b6a4485787af63a3a8f92918863. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM6N22229131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab4b719f7326524aa0df742573c538259d286582dc357d136414cd33360ee38. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TR0012200477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34ce9d53f763ce1ed1561ebb840938f403a06581ddbccf56dd7d7e3dc5a6fc6. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FRX872369691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ce62f89a699ac2eca4bfa1caa68fcb666a55f09b8947151ae9567c1a9c7bf6. 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/FRX872369690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13270e31abbe8f7bda6eeef7ca53865a85d3204a27f663f619c0dd2bf0f325c6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR96X2419215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4508ba5780e05bb91db07483a84718d8ccf9012a21aa4e90e065fafe6cd66d7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FR59R2599944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac3a1e15aab97917acad85c442d8e5773f33633df5d4f2eacc6898af26f869c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR59R2599945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caffd33fd4dd89dcecd15bb0672c4119b8d25837808dd26b77a0f441b46ac07. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/FR59R2599946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d2e367b0d25e47657124172651805377755889d6f3964fd3c98d7f2e70711f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR59R2599947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb23f29d56d0f5b6bbaeaa1b206b262bd0baa44cc51d56388c14febbf089c0f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/FR59R2599948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d357c5de752771a1df348c321059af02df25b70512bc956e17b9d6a06bddd8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FR59R2599949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8d9252d929f5f40895c24d6e090e1635990caa265a76430a48716c50ec9aa. 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/FR59R2599950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa404753346eca7f7ad41b14cb2cdc0dd8eea91a5d73f2f65817d97788c7d09a9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR59R2599951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2063785c4eeefd992a0dc7ebae3ec8ee5594cc9fab9711fa1049e342b6f1ef0c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR59R2599952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03cbc87007a6741810aeed213302ca7ea5bb1b47804005f0bbb82b9d9408396. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR59R2599953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368bb70096f14585041ed102a7f727e63d472634813c8edc0c441f9d8c69668e. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZTPX2599622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c12987500af67f65f50d841be7f157388375805fc9a41e132178d7cf88ed92. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TRCCT2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c12987500af67f65f50d841be7f157388375805fc9a41e132178d7cf88ed92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TRCCT2100050.