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 0x55df3ec15f670649da4b9180ce7b727e93dec63fd37dfc8fc86cb5f37a1d5416. 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/57a78631-5fb8-4055-bcd8-ba507e7bcca0.json and https://artists.proofprofile.net/proofs/artist/57a78631-5fb8-4055-bcd8-ba507e7bcca0.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 0xfd781258eded11944278717c73704787bcf4ca5f60d5331066e18d1e954f0ceb. 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/QZES92337809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cc7107b75f2816694cd91239f6ed3d7ce5d6922db9ba00f97668d3f5a53f4f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAY2307190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9df521846f0a1a2b90f3d505c33d3b271d69deffc57d40e532dab1ad8f421fb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTAZ2372735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b5c9f622562db4ac8190dd92003b86ca18a2dc22d1fe8593fee67895f54775. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:26:17Z), 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/QZWFE2345173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1904b8b1f4a0d4377ba0031a597499d87d7178b8563720d749be032959b7ad2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFS2429324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012e6d75cce74d2f6a8d18760d3c924ce4df73c0cda226e54d6719e7a6f7a5fe. 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/QZFZ22552517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd39312d9625023f5a6a0b7feb579eb1ed323eb447346035202b6e070b6a5281. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:24:36Z), 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/QZFZ62593378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba694d940c46974a9c54d26c16770fabf5649bdeae8447af8e3fcc9f935f2e6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:46:27Z), 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/QZNWY2561389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00165198576e44990f7e26f38ed40689f3210656478732180776c3186bdd54f1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB42520314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac4878c56b99ce21347cb2ca5af2c5fe00c6a5669b4182e4ec60b66f524fb9f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EX2572111.