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 0xac4d76038a92b6d7b50d66296bbfbcc5068a0b40f2301dd349fcd08cf74cd551. 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/f813088f-62ba-4eed-8867-6efb340d559b.json and https://artists.proofprofile.net/proofs/artist/f813088f-62ba-4eed-8867-6efb340d559b.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 0x5c0c15f7967fafec5f673c502c45b647593b3b445a00af082c478b68128a76b1. 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/QZK6L2351234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b2ab82b999fcdd7b712cae12d2086c58af812dafb6a815fc68c7cbf21648b8. 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/NOPM72201200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ec5fa134f62ceceb924b9017ed99ed7a7039be53b3fefeade1ed1c12469458. 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/TCADB1748830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c52ccedee15d7caec4674ed93e67ca93cd199a157c58d2b7e2cf91644f4e125. 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/TCADA1728868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6af5e94983b77498b700c53f8a5d13ddc39d0428e8ee604ea016e7ed0751c0. 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/NOUM71700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ef37ae4b82108b5b5f141304cc83b2b31b1e239d0d2f3abe11496cc8b468a. 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/TCACT1619109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9837c16c9e7f780ccf4e38c13c6b977dbdb07f1700a74eb82854a166c20a4d5b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACN1604474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5fc73f7be4a80125625fed86c7ab4b4222fe350eac060b5613d1c526b84533. 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/TCACN1679416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6555de32faba948d274c3ee5c2b78a82e67eaeca08e8fd7bdb904c63eddc468a. 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/TCACN1654488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71794ec9ceba9f343784b2c956ee5a5e6e38184a8a6c83edbee0dd162ef1e4f1. 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/NOQWV2201170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba45d917b75de862f7a22b1eaa6f065124eb3ed5181e10f134b07f2eb18f383. 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/TCAGM2255742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc062877ec9ffebade1f5b0a5c2fa0b1dd8134135e9afd50c59b4062df070fd. 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/TCAEN1904313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5835e24c1b346f00ba4cf70ffbc0bdd483b486d8521d03f932d53a69b0c7be78. 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/TCAEA1815224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73c1fbc893305d9e485b2345a5f0d941fddfd87471a7977e5b5aed9ba3da0b6. 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/TCADO1895323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e25fc2c2b1c79f94a201488885d1728184d79635e690aa4bd2214ec803ef20. 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/TCADO1810904.