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 0x226d88a1267b5de198d810fa61f8e0740f5c490caacdb0d7890ad73561f851d2. 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/b9087a8a-f770-468e-8070-8cae4af51769.json and https://artists.proofprofile.net/proofs/artist/b9087a8a-f770-468e-8070-8cae4af51769.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 0xadf6895a851c68c96a950afee1f80929e1467270a8ae24e57e6a6af2cef73f43. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPLR2025159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29af48dbed10c5d53c7798118f2e7e5640d327be48bf8502f7617014b8472b12. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CARFQ2100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a370d0505c5c361dcd45c6c7dfb651dac11a9714309e324d64bc30f2358346. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CARFQ2100333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426670c39d8690e94363eec4f1baada4691670fbcd2a6afb901ed95e7ba5c494. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CARFQ2101541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b05f83cd1fc7eadf20a79b09893c6bdef68cf7720acbf1f59d7ae8881e2d112. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CARFQ2200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36b27134c7b8c575aea8815b4eeef3805de9ee995f8c3d6c7e0a1a650e6a85c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:52Z), 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/CARFQ2200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f507d066357bf7cd58d557fc1aa9b7f67b0cc69ab11ebaf90040e08efbd131. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:26Z), 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/CA3R32200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a11056cbdd3966693fe1eca2112b01bd7966652fa776a9f3baa219f4708ed. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:10Z), 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/CA3R32200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3936f3c87271316b448ee816acd51a47985922a2be1bf79d38b01f428c5eacc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA3R32400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e4afd362117e2926496689cfb99ff418cd082f9371c2395ef7e815f67c52e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA3R32400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d28c470acd2e9d4c29476464cf0db2601c77506c04265375b26cc2b64def1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA3R32400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b99dc862a9f317c9388bd840e38aab814140eff5a3fc5fc20503b717297118. 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/CA3R32400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12755147f123d68088c50ef3350dda8c5485d35ca9d90e6dbb7a184b0248ad32. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/CA3R32400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08337041e2bc6122a7820640128c55e7c545c6d59145eb4058b6bcaab17031. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/CA3R32500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5fd668fa85a48dd9445793d0e603c8b70d225937fdcd338368b18c8baf96e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USZHR2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a432e70ef86149684f8ff2377d89748abedae1dd2ba205f658dad48d6ac6ca. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAIW2457927.
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