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 0x3b6bafeb8181228fd2d58ed83af37a52d36018fd89081779dd114816db560b07. 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/f064bc82-6ab2-4e28-ae84-00d2b26d8de2.json and https://artists.proofprofile.net/proofs/artist/f064bc82-6ab2-4e28-ae84-00d2b26d8de2.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 0x0621ce2e7efad6300a16f8dc2c1855f9719c4c9c0565c626b3efb213dbcb2116. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:31Z), 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/JPI101301580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a17601848632cede3f08dddd2b9020e246b03174ac83eea4e38365ba615515. 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/JPI101301579.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bfcd08b97e7864513eaa47af2a42e8266d7adac2eac4171f04badd19201c90. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPI101302316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ab878e4e7f5491798219fd4cd68c291d8df64509037825029e57a040f28020. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:05Z), 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/JPI101302314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861dd9f99dd494633e9e9c9f2ab36f16593ba53340dd9ccb249d9c0db87cc3bf. 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/JPI101401444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861dd9f99dd494633e9e9c9f2ab36f16593ba53340dd9ccb249d9c0db87cc3bf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPI101401444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad4fbaf9dccf28a38c4b244977486528d5e5dabe45c73d1377aa5d2f299264b. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPI101802118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15911dc93fc6f5a899a99eba9b02fd1d2307b713b593d55d3644eec9ec7387c1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPI101401755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453f087112be4e2c77549978d16bd97061016b13d46fac53f1ad3322c9c6e126. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:40Z), 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/JPI101401756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf18d824bc281e631b587c93a6cda5cbb32ef1106fbe415492190df5d0f7d369. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:31:41Z), 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/JPI101401757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15911dc93fc6f5a899a99eba9b02fd1d2307b713b593d55d3644eec9ec7387c1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPI101401755.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3ba95d849d7739398b17365c242b4192942a04faeedfdcfdaa7b4bde2d324c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:19:38Z), 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/JPI101702272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8a9a8e1b3174da73baa0cdf0f8bed96509e7b142637b502b97fa8e6cb518dc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPI101901077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905782cdf52900dd115b2626a52054bc2c51f4023db491f70a9f1327084c364a. 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/JPI102301790.