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 0x2722bd53277d05dd63f643810bcba9a72434123a501f88a8e980fcd465d48259. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/263ffe08-36f7-4003-84c5-2e32d4c0cc25.json and https://artists.proofprofile.net/proofs/artist/263ffe08-36f7-4003-84c5-2e32d4c0cc25.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 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 0xe292b2a0db2b2b583b050903dfc9aea1344fd97c5b2fc80868dd5671333ef517. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6SA2212741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe292b2a0db2b2b583b050903dfc9aea1344fd97c5b2fc80868dd5671333ef517. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE6SA2212741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d98c7a98d645c61e4b335c2357e48deb37923b4b8fa5816cf151cde4c4311cc. 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/SE6XY2220854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f7eddc40fbcbd78dc0f8c3876d316b2aa53736a5f8b7391adf468769d6a0c. 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/SE66N2299227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a351b43bcb403929b1e255e1fe90cfa82ef93272fe25b5746c4b59c9eba75b. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/SE5BU2358815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0594e4b238d5f365f115375909a730b4af58af98a6baa8fbf88ac92c56f831b3. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/SE5752398623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f7eddc40fbcbd78dc0f8c3876d316b2aa53736a5f8b7391adf468769d6a0c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE66N2299227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b9508d5e23d90290bc7a2ebf7b1b832154912189043e93e1bda188a9c7a499. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6HN2452921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969f08279c1efa470db73c5013198c0b46bc5636439eb79f564b18c079ea397c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE6XY2321289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd0c95fbd47d91a1cc346dec0e66d2dc49040645234ae9c15c36fac32cb55d5. 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/SE6QE2370551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bf2d653e3c0e2b1e8cd871bc472100b5d822378f065c8925e93f838fd682d7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE6HN2452922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1eeee1fca0277494dca4366e2562d2061b373816cc97ad314cff021002616. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE6HN2452923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44facab20a34490e5c33c7971acf57b98358156f7218b323ae21b008af0ff73d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE6HN2452924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc268c40ed00bff82947ea3e7eff56e89c0e51352a54f79206dde8e2afa1456aa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6XY2543255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e20f7e531b1055e9784fa62754103388f904966a84634f24f934ade5b9977. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX282140854.