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 0x2d540018831547202ca009149ca6c3fe04286b4feab470fe55a9592532ec33e6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9066448f-234c-4a79-871e-e511c9dbaca9.json and https://artists.proofprofile.net/proofs/artist/9066448f-234c-4a79-871e-e511c9dbaca9.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 0x9eb44f789483b911fe9ec9dc974e5d22033c2f97591a729d7e3152d76d9c34ba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNMV2021208.
[ H.I.O. ] Hardest Independent Out ( Deluxe )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82741b5dfddcfc5ef10b031777b863381fbbbc4df009db08c4e7e84e30e8697d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNMY2121822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7481c6d51e8f2ac8c76522d656bb195c092c695ff2f6f9eb01316e957897559d. 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/QZNMV2284730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3310d6e0aceed80c8c7e8fad6382b64e95fb936dd13b84d3534c3dacfba6dee. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMWW2374821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9286f1b5471b5c01178bc56bca0cf173f368118473daa1d98f2860c9e31ff4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNMW2352997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a0c35daa9ec0978818c144feb27247d7f80e40d5de41dd5e743d4392cee19e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNMW2353004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329016b5b8525909069364c23fab04877331106a479852c1215e56a8d3dce897. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZJG52425847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb309ec247bbefdce74a6a270047d816227e1e7e9adbc61b7a87552d28d3256f3. 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/QZJG52427102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7547238bde658aba0fc7ce8c6ae5c6cd91192ca25b191cb00ca7cb885bfd635e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:06Z), 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/QZNMY2437298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dfa939e2b441ccb93b7fdc60ab0c6ea7ad8ba280194e20cf3c500273c849a7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZL382507061.