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 0x6fc70ebf6fefab2714a7a4637fa982ee4432fc13472ae00491da48279b6e3cf1. 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/738d7b8b-3d74-45d2-8800-33d5aa60c498.json and https://artists.proofprofile.net/proofs/artist/738d7b8b-3d74-45d2-8800-33d5aa60c498.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0846a2b082ecb2853410944287c51edbe0397ca93b8b34527aa01a7b467e1054. 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/US6WP2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822827539df5435775aa63a49241889b43371e2daffc554f59a85128d9f1dbad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6WP2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec479f443b2f1e2cec8f341e9ad89787ff6533b771c98ddec032b7beb514599. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US6WP2400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbbe71e100ef2726e1807d20a98dcc6045d86b13c77442232c351cbcfbb682c. 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/US6WP2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0846a2b082ecb2853410944287c51edbe0397ca93b8b34527aa01a7b467e1054. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6WP2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbbe71e100ef2726e1807d20a98dcc6045d86b13c77442232c351cbcfbb682c. 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/US6WP2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e7c244cebbb4d7849e13246958fc9bc8bc7090ec4891d44de795b5038b7325. 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/US6WP2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec479f443b2f1e2cec8f341e9ad89787ff6533b771c98ddec032b7beb514599. 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/US6WP2400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0846a2b082ecb2853410944287c51edbe0397ca93b8b34527aa01a7b467e1054. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6WP2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3a02629af80089ff33f9038b142997d0dea6202e46ded865e3ca6b923c0a33. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6WP2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbbe71e100ef2726e1807d20a98dcc6045d86b13c77442232c351cbcfbb682c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6WP2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e7c244cebbb4d7849e13246958fc9bc8bc7090ec4891d44de795b5038b7325. 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/US6WP2200007.