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 0x6bab05c126218bfac11cc5656a7e502b4af42d44b0df3a50801bc617fed36b26. 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/65924e5b-38d7-4d2d-88d4-6906e6ed66a4.json and https://artists.proofprofile.net/proofs/artist/65924e5b-38d7-4d2d-88d4-6906e6ed66a4.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 0xe08dd45dcfa467efd01cfdf5aceba7b20b9b395d8a7ccd50b4f34cc3af01dde0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX991579854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f9063ff0787296c98c46bd66e50d6648d851b17cc590c2800eb3a6b7d40c2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX991579859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20c982b0bb5a6e0389826074561f7641f0628803654fdf4b0f03937268f50e9. 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/FRX991579862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749bf9a88af5158cf726c61eb48370e88c327fdf126b8c07f39f7b45a1e885d7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FRX871582159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b5b7505f3c6d134c371afe135d861fc4c3b8a78e1d6a4a68d764e2cc931ec0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FRX871582162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b1520fb413be04b2ee3b38019785e552ea04fc58f00977ee60fff4d486ed5d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX871582167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c2228968ee6c4ce0f6b3f91037325ddc62e0d6439dd6ad9fbe4586e02741e4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:07:00Z), 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/COA2N1700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1182e0327a13c63f8d422717185dd3379ac849035a2046914bd2061a7634eeda. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/COA2N1700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03818de17b8e98faabaab924d34f487af4062bc89b5b523dcc48d84b9e4843c2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:44:40Z), 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/FR96X1825076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e8d4b3e81a420adb70e3450944955a075d756da7a7dfc7db4d9c0e15c09e3. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FR96X1825079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc5adeebc89f736816aa021e1869a962d5c2b43d8c4a76f3532938d604925aa. 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/FR96X1825081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8699cda2da9367e161af245c8f5468e57c9f961f6ab577511a57515b2d28a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR96X1825083.