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 0x03401469b466f0b60bc58a3b01747b238d3c1d6fde9a95d215a43d8bbec6156b. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ef68ebc-7c14-41d5-b666-600c1d6531ad.json and https://artists.proofprofile.net/proofs/artist/6ef68ebc-7c14-41d5-b666-600c1d6531ad.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 0x5795b2f2defb14c2c4309da25164a6eb08502514f5cba4e5a6e37e705d0fbb95. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6M2280722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038a8a6ce7d1fc031e9eabc151e74a2f000b02791dc0e23d38c334bd0cfe161c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:58:28Z), 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/QZK6F2205105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30d83d9cc3166a00c2dc0fa7f50838e910bc533f585d8fe01a9f0586750a98. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2202260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc346dd9403698966942591fd3a4a91aa4fb485563e48efd9d23902a2813f2ac. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZPLR2200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44136e3adceb4b9412695f60d31e1b1bc7625aa5ec1e02081e354c8d7d865e16. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAX2243416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e9b9966488408ef89f3961b392da0dc7e651bb89ac1fb7098fd01b16a31297. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6P2360677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1ba1e519f167e9944f315bdf6a54e0ec1d05af345794baed1e11fca703df6. 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/QZTAW2338916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03333f79ea1afbe766942a6343351a37d97c0da17874e969fe0422d0c9698f9d. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZPLS2403654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0feca8856f3a1b7c610b0eb9bd34e242daafe617333c6ea4a3625d3d8a40db. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZFZ22582386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53aca0b91c4d878d7ffb69a404669301245863ae1a14cd45895c0dfb6f05266. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:46Z), 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/QZK6Q2542936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4a66071eec63d418e55d7e25bd86ba2830aa1c46276eeccf37a20b37275c59. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFQ2554253.