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 0x6948752b8d7fac4778bf846d11a3ad851cb6d1b529b6c26d0edf76b701394560. 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/b7dc8e48-206a-45b3-9fd0-b961f3c4e931.json and https://artists.proofprofile.net/proofs/artist/b7dc8e48-206a-45b3-9fd0-b961f3c4e931.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 0xdd29a0bfe370466227d41850c3c4497f312d0e706fbfa12c1f21679143f9fe7d. 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/NLSB72200949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee202d51f7dd342d0ef260e3640278aa8535c79a027b0ae07634e001345626a. 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/QZRP42239231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0972afb564c4f813d4dc280c3998a402954f316a0c9c62a01bdf6818c4442271. 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/QM24S2200431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0976586fae5df7d86a1e8c03c9e3e65f223988ed6cd0fa9ab59c6d1a7228f24. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f0034f1184f9361e20bbb218563c13bf650b7a6db7dcb386ffcf3be2eff6b0. 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/QZNWZ2181188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8756717ff7d9251b4b295ad48b94f8b04644880ffab2f82bae8f326916f345. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:50:23Z), 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/NLSB72100419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1691ea441395beaa34391d25d553d431fd4659d241bbcb17f2ae7d7e9c9df6c7. 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/QZK6H2165557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f06311096a7d1160134f2108d38131b4813086b7332385d81d9f390302b09d. 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/QZHN32184900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a64c3093b731a957b0aa07ca53d5ca65305926e5f5aaf438e915a1d722745c. 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/QZFZ52161452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f47573b04a1ec674413e57c710cdd95ec4117135d95b01c0c9d317db5e4987. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWY2073667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b295f3c65c45690ab069ecc84ce7a0f98599ee9c1b32b524f91b17a87a837f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWQ2051621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8aae38dda54d255ca9532ee1c04b1795886acce256d1d7271045ee7497b27f7. 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/QZNWR2075762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1660c4efc3f4b55bdfcba8e6c080e4f474bc3792c3f10f41b45ce6e6c8b2b2f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYZ2492235.