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 0xba7ee307317244494fdcb56038cffb9d0ae2d3c2d6bbf483346cac549e8a5ea1. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fc6f808-df19-4eb6-b32f-b43ee50aef81.json and https://artists.proofprofile.net/proofs/artist/7fc6f808-df19-4eb6-b32f-b43ee50aef81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hiding In Plain Sight 3 (Chopped & Blessed)
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 0x082d2b4edbd84fd26974bbe23669589872d81e11f95276b78ec6a1ff7f7c8a9e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFS2317797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe699d70cb8648d320159f55c98bd7a0bab7dc589c3d46407b2209d08d47bba19. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWFS2317794.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60148cbdc844203127cb6f750ac6b9563e1c7a5a7ee5061e1c89889f991d5818. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZWFS2317791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fdfa080415d21c27ed85c890d6342509ad4304f3d46b0eb8d8255a3f575e25. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWFS2317792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6c1a0c81b27796576b768cc9ed55a31780a012f3e2d4c95813f9c8ade27207. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZWFS2317793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc270b30a1630fc8cac9c18fb9795ea271bf0827a9cc5091c2c2bcdfaeee33cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZWFS2317795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986fc070cddcf5149cb3652b141cf35717c9850a5e74911efcce15be157248b0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWFS2317796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b823cf6f807f8c8b232f5182891b821def3658cc150388e59c7c46810668bb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ7S2419304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b6ca213119d3121a05a3afd3d5d17b8493352fe9c93207767de27123c3267f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZZ7S2419306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c57a43de772ece5ee1ff517533a323fb9f49459203acc3987aa7375e2c77f9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ7S2419308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239686de110de7ca0ed1e8b8d8afb4b6b44d93225ecd555c9e18b72776606da2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZZ7S2419305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cbf9e4cbae0313f774ef09faffe54d96dd2abb09309ef6912f1b684e073c10. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6J2580545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe480d8d0c0a62e1ee4af9bea07962db7b9b07f9df2e635fd33f6fe10d74df20a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZZ7S2419307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c19f8e4234b3c796403786c732a966bf70208a5fc4f272ed0a67ef2737ed291. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZZ7Q2466925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4497fb2bb7f1d786ef42a11193247a439cfe88756cb2c1d6c830e227487a7a98. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZZ7S2419309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec644c8c6456a54a53724020d106673dccc02e56aeabc8c4a9f44118c07bd227. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2325398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee09a22bc57547c2136868810cc64e5162e90e06b616edf840fbe2897e47df5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42534349.