thumb|upright=1.1|Four traditional dice showing all six different sides. thumb|upright=1.1|Dice of different sizes being thrown in slow motion. A die (: dice, sometimes also used as ) is a small, thr
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 0xa9176bc48c391360cbe560b455e35c10bbc1d08976205b977a2f6374be1a8977. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4093731-ee78-407c-8c3f-536167773673.json and https://artists.proofprofile.net/proofs/artist/a4093731-ee78-407c-8c3f-536167773673.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 0x0abf4a30d28223ad0ca360a2fdd6d0673943da329d0aee881266f6abd863a14d. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZDA52038812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f4c1e2b5f91626f244d13f8d9bf7b273d6c9a45e0231fa451ef7f16eeaea7e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTBD2397147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25a341dd4f0fe7fa769ef35de480252919b46de0ee8edf0c0dd0b8d09aa71e2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:26Z), 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/QZTBD2397148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf070fd866f9676ffd16be0c665ff6e25435c95cdff757b3e8cd56c807badb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:10Z), 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/QZTBD2397149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d7e243ae21c5fdf0610b654a153310106f11de5340e0a17a0cb6b665c589ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBD2397150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec8dfb6d93c9becf4010d1057594807364a3d40eb8b02b1d9ec102cc4fa6fa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:27Z), 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/QZTBD2397151.