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 0xca792c90815728b0ee6a17c6cdc48d9aebc2fb1516ec1c0e6753c3c0235657e9. 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/779ddc74-c541-4bd5-9be4-6763eddcb564.json and https://artists.proofprofile.net/proofs/artist/779ddc74-c541-4bd5-9be4-6763eddcb564.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 0x263341e36bceb934823e20adbb53861af61b5b455cefd091be07ebea620d839f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA62093908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d3a38450a6bb32fd7199d2b4b45897e1b513d6b7d1e523fb46e20ddb495ed7. 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/QZK6J2492702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b10048dc7282f5e8d415286f55b215a30705e2657f195adc0b15799b8cdb2. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:27:42Z), 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/QZNWU2403414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3352fb8565334053b8795e553f9113a54777608fb8b29445c0b6568d861918dd. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZWFK2431461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d0c1a57634d1bb943db3f893368c07d97d6b5698860745603399203f895aa0. 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/QZWFN2437477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273a0849de65af18f49d751f9a886ab48d3aaf04315bc42b7cc8a760efa11b9. 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/QZWFN2437479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b10048dc7282f5e8d415286f55b215a30705e2657f195adc0b15799b8cdb2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNWU2403414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47690d7dcd5a4265a7a6ca21fcb3c17655cdc3073b192be742df2ac8dcfd3c4b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFN2437480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a182747e56b04e47b4261d9725b4dfe51a9b41c1cbc5af1166a7f26a250930. 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/QZWFN2437481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad12f28f06bf5555582fddf5b159604122d9d8523176a96d18faf7f8ed7d8ee8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFN2437484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac43c75052c621839b0c5cb482a1a07ea2294d48bcb0fc868a2b2fc0836dfa60. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:17:23Z), 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/QZWFG2543345.