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 0x0de0d851604911ea1ed5610cc8174279f139d47fda9f3e0db0ba485bd019c256. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/137b0e70-f461-4fcb-8967-892ccfa4b273.json and https://artists.proofprofile.net/proofs/artist/137b0e70-f461-4fcb-8967-892ccfa4b273.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 0x0ff957cfdeda30400f73724eb1192e3115d03ced174dcb5cbc823025d961709e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNC2224287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec85740e1910ecd14dec2b07e5b96c340f88b4ea4511537580894ceca8e6bdce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:07Z), 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/QZNWU2297077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31869d8364448eda6d7f5a1b0b3d451a72a5f47da7dba004afc685b02a444ead. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES72369677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f05b350c832d4fcfcbaa22036356f673a1e10f69590366c43a2a88b55ce35e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNA2389807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e98909e5df97cb9017f55d2a85d062fb3f3594b48573514224e23d325cb68f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6M2318214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ecc2f237e037e188ab8faffef3ae5e911fdea2cbdf00b04a5fa7b2810557a1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:22:51Z), 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/QZTBD2414023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec841792b0dd21c5d7c84d32feddb3758a9eac225c1696baa90e6dd83ad847. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBD2414025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff657c392b32df0654fce590b1e308f7d6a65c7aa22179ded9e44608c3cc2da9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBD2414027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5152e85d1592ea6e6f8d72737ff9d1048a8006b04e9145d2eb9ecc793524a24. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZTBD2414028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a698c9e3b31679289eb1a0410ac79fcc09f7814027796e6271fefca0bea113. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZWFW2444432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcb0534e24fbaadac81ae8285a35a45e1a8aedb059365d982520a05c18ca373. 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/QT3FG2528913.