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 0xd5fbb4fe5f007194312cb67568c2b4a4e6460d1a6fe4d1bf404e518fb51c6955. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/755955e6-5660-4b5e-b386-04d74e75d921.json and https://artists.proofprofile.net/proofs/artist/755955e6-5660-4b5e-b386-04d74e75d921.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 0xd5367e63fc31648f993d2ed7e706d17667211957663e3ffc172c3bc3111dcfbb. 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/MNA032200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a135526fc07b284a757e49de97ae5a24a5d28b36ead1b5a710e0b60d23feb46. 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/MNA032200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7616f2ad4d8b88484cea19861173f5d9a099399abc417030a1cd9abf3f10e3. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:57Z), 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/FR2X41620395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33688265bb5b71903f81355b9294c5b360005b36e22dd5dddf76a0a4092c3b04. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/MNA032400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdf5260f5bc2dc43f45aa40fbcbaf401e5740e06cb60570b236eb23227304f5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/MNA032400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b95eb235cc1920923a0cdda81ddeef0fe70613297f3b788cad3f65dd60ec1ab. 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/CACWV1987721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446859f3e166b874cecd12c365f7060107a181b6c03c93d436e4041e639f6a83. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:31Z), 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/TCAED1941534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1e63fb15d0e6faca09e01aeb2045e966f114a7071a4c69bcd680a1657fd977. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MNA032400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7cc8822872780c3cda67ec8c902484a939b70ff1353472d47374cb8cb3df37. 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/MNA032400275.