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 0xceccc9961f106aabdd761b8a03954c1c499598966c80add7e22cfae9ce450ca6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa97dede-429e-4e4e-a122-270bdd847e2f.json and https://artists.proofprofile.net/proofs/artist/aa97dede-429e-4e4e-a122-270bdd847e2f.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 0xd416c938071c089d2cd74fd08ba1a48d644af43665a6fabee60b93e37380436c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX5MX2255268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64dd27551dadcd5993b4349a6394a19faeab3b6e6eda52e8eb7015d654f68c8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZRP42273375.
Hard To The Core/The Destroyer Of Worlds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a4deb27f1ffa2772e3e063ee9c46d5be554ee8c141c6bccd033e466364165. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2231728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bb465541e83ab824da61f9bfc80afbbadd90401c5c91f5c67e05b09f878bf1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX38U2367482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ec166fd9ba4ba50f6eb84b2fbbc9f26955216f8f711395de72ae7ee7e4a358. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZTBA2348129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1874307f88f77b5337ff067efd47afa13b847f46bfb17500777c216bdc6263. 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/QZWFG2439372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f1747e23cf6cd27592bc582200ba7106880df230ecaa7e29551c9e63c00c64. 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/QZTAX2577350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcc3208432e107aae7f20b52177f9728aa386e0f1dac7e8a3fc96ec3313fa8d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:23:42Z), 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/DEYZ62500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a92620a528bd91dace6b9066156970accc0bbcd18f01bc4937bbb1a9753223. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3EY2557511.