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 0xcd92998808eb842b8756e41234fcdb57fc8e617323d64d9fbea63111d79751b2. 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/7b2d8563-31d9-4724-8ebb-3ef5a30e4e03.json and https://artists.proofprofile.net/proofs/artist/7b2d8563-31d9-4724-8ebb-3ef5a30e4e03.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 0xc0dfa7b6ec36c72b73fa88d616d07e4ace636eed53f7ae79498c8186a87e5dcf. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:25Z), 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/USHM21605281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619fe9efbc7157f8562b6e1c72784fa425582e18330a4391d3a0b2ea8f901300. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USHM21605282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3fa5f56f47c3c8985cff1838dac79f52aa08c4ae17f36203fb970b6b6d16d2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM21605286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996903244accc8bd049ffeffc17ad07cfd5ff61496136e42c7b70112fe429544. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM21605287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd15224e3e63df9c629a4b0d17afe746ff1bd11d48218b63d3587ebaef9babb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:10Z), 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/USL4R1924579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a1733adcbee8a02d355a516192545e3fdec46c1a3ab1dcb1b584900d69a346. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:11:40Z), 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/QZTAT2122593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f96e2a90bcad73a11b1d1505040bdb679221548589d6d35ed3311b4ab0ae7af. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:06Z), 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/QZFZ32266632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6816ca9f7938baa1f74a66dbe4f48607061a13abfd615a0ec01b0df86047a98. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWZ2204838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b30e46ecd0db79f46ab7c9114dd4f7d3ee6484c7ab1dfd663a73192535e022. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAT2298990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab5a0b73ffbab568e3320a158b08fea32d3884dd384ef06babee02422746dba. 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/USCGJ2029777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0951863a0e6543627321d067378d5264db0d5271b6f4e0cb0077feb618c9ee3f. 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/USCGJ2029774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f56ba228f0d9277f917f483c14fe6a07bb92d824946797ee9b6bd99eaf1019d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY42049161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7e0b13eb302a75110a26954449ab1f45202200770527e774646ed04b3cffe0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM22050468.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59788f5f6b1277342a912e6aae7e38120fef1f92712b4a4afbe796e0c1ab1871. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USHM22050470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e22c88e83bca5527a876b89f964c13180a14e0f8571d83bef31923facd2f62. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM92003661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec9ff65e839d55b275aa493f42c38e36565dc341808e278e256fcb40dbd18b2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM22050467.