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 0xb1ccf6f4a740997c4579738a2a976b32302aa829eb56f7fefdf0d1c0887e4d1a. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4845078-034b-4f3b-bb4f-6d657084d7db.json and https://artists.proofprofile.net/proofs/artist/d4845078-034b-4f3b-bb4f-6d657084d7db.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 0x774b261cecfaddcce4d88a5d44dda3157d4d27de7d5d3385ceaa9ad892934752. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:39:03Z), 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/QZZ7R2420703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954bede24df68577c4896cd419e7343c9774d0f29c1345c7da148f1b25c90e5d. 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/QZZ7U2401909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509679e32c545e78adee27a7725a6c7d235a41989f91bb06e9c2305c8c039213. 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/QZZ7V2415563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69627de3338630e9d8b67081638ed37c8f4db102b4e528fdbb648097799c80fb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3EZ2434930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb3927d98186943243fcb97cd0c7ebd5bda1991556c6c9b295ef6391d8fd2b9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYY2572825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25db7589a74c48d196849b3435056e218784b46dbc5923ed415b7356970ca285. 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/QZFYZ2560041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7003a06a11b56bd9f4e00dc384f06237e7b6ab24f7a8b5f1b5d33577711d01. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA52572177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6208b831b8cc7c0af18918fe82953484fd04b81815cdd455faea174962a14c97. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN72508715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8920073bd5226af25ca4af6f048cf2a40441cbdcb798ed85a7d4e41c71a6be9e. 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/QZK6P2500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb01faf92f91ffd9f9a2dcfd0b32f2aee6593e2b0b960abc1813a934f298ea7. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZK6K2571794.