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 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 0x6a9355ecb0f71e55580212699c8aab5dee654d4df58045e05ad67d4d6bd33738. 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/868a048a-2f8e-43e6-a2ee-42cd4bccbb40.json and https://artists.proofprofile.net/proofs/artist/868a048a-2f8e-43e6-a2ee-42cd4bccbb40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x98dbb85137671461e2b9aafb6728ca0de9d243424f24704e910baaab385c67ae. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPI101802308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa641c7805d024a940e5d3b7381b56ea23405de5eca47785408f8d640aa82ab54. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/JPI101802951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4ab1972d4be1459fc76a8f200df70bc3206b561654296de262756d0015ef06. 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/JPI101802975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb9af1d547636e88fa9cd055a57f641f3c44799079a2e08e58005ab336e86cf. 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/JPI101802976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bdeb425e226c3262fdcef68178c09ddbeb234de98b5c71343516a1d4061ddf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPI101802952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb349466b4509335388ae7da5945482cb210c72c6799a103314212fbe7ba99c23. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPI101802954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f0ffab6442824bc960dbd584b68d06423ef8b27399936a31d76071b1da97ec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPI101802979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365f1ad118711fa6578b289062ed1dc02077dd8dce7a59b10253a2f2e55381cd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPI101802956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a4ca04f095d93254e5ec1a43474c459508589ae88023b5cb150f48dcd97d7. 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/JPI101802957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5c7601528c381b33f5abeb67d9282096f724ce6ae40a28a59f9cc6e9aaf9cb. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPI101802984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bbcbacdcc47d0c05229f087d223c60a8a3f291a2d226a57f42c43fbad469bc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/JPI101802961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3353896cdebd450b3228fdd0bc5f637975f3154dea4120889c80be9bfbf686c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/JPI101802985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1199fd16b382ff5696656bd7ac71dfcc6cd759344e36bcb39343112536a459f0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI101802937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b22537c8e6fadeaa01a03327ad712ee4b78eb4e18879d971685435755bb5aa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPI101802965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f59af0b6bd51abb2653f3536d55b661290c9f78be2d8a6733c50344f1ff2da. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPI101802967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610335fb8e6e045fe95f4738dc44bb773688743ed878f63704303b2adebfa6a9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPI101802971.