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 0x311d5d5f781ba09f7029e80d8cf3b43d0a46303de9733c0595d08a7b3ec9b95d. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/224e4f00-2ce2-4128-88ea-941ce3e256a1.json and https://artists.proofprofile.net/proofs/artist/224e4f00-2ce2-4128-88ea-941ce3e256a1.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 0xbf4a2ca65a5e0c9c6abb88cec5a8c5bb8a61ce420553debadce10975d74d140c. 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/QZK6J2011751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7514d855dae3840caa95217a28165de26f4bff8623f799c5307a8599b6ad9f2. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6J2011752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95a2b946327f133d950e08bace2c2a61b47f26f9bca61ad9ee77b71c372b180. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6J2011753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9813de49f06afd4b6ea8842d8a013d248032cdfa3d301731cfea939d7ee067cc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6J2011755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3d0ea61468549e95c5d2931d0b868b85121f0e722627169492321645071a10. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6J2011756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345ef19f98d62ac16ac761def1f5679e83a287873325f739ed68151d63f67e24. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:33Z), 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/QZMEQ2076219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81279f7c1dc53ea7504c0934c8e23b34b7f4cc34e1334d203696f7a4880ddd80. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:05Z), 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/QZRP42241648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82049c6b5d6b39ae93fcb151cecbca1ad856ab6f70a6591ec1f0e2e706a7d529. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZRP52255757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566bf951bbd47c833ee181144cd1bb4b2ebc62e0b776c4f04be9084165409242. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWX2434927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6097e99dc7316a5e2425b68aa9697649063a7d96f8254e6689026d5a2d2511e8. 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/QZTBD2547845.