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 0xb666e01f0009cf34fea7eac0edcad19dc48a26fa29afb980c54777691fb61416. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fc6d80f-8c94-46b4-874a-d1e8a9612669.json and https://artists.proofprofile.net/proofs/artist/8fc6d80f-8c94-46b4-874a-d1e8a9612669.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 0xf55c23b321386a7796a0e7209139a860c15c071c091dfdd73e16e7b6ed5f4f2a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DEXO52017800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60254f2f8478961e26fcbbe34611bd987cb47215037252a08a1e89ff137a8ec. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:31:32Z), 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/QZK6K2039070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fda0436636ec0e6916698a97fac0727dcdb85c71bb3253b07dc7a73723f380. 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/DEXO62062322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d66128a131cb63ced199af94b39861e2ee121c9699c0bc6fd0ac03b6a8898. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEXO62062323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc5fdfafd05ad62c1d6d7cafdc230fb96e41d7a2d0e787c1e05bb350e38c99. 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/DE1A12197944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5301366717bb8075deac74b4449abd81d2a5ef72bda21104a8d909e8f20b46c6. 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/DEXO22234664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1c4108e1c29497dbc1c70e3b3ecd5156302996bd8f687456e9cb0e9a700ea0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEXO22234665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf20950155ebd8ad8714f4ed6a7947d18c97361b81af7fa22b5cf952d6eb1ca6. 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/DEXO22234663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5301366717bb8075deac74b4449abd81d2a5ef72bda21104a8d909e8f20b46c6. 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/DEXO22234664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf20950155ebd8ad8714f4ed6a7947d18c97361b81af7fa22b5cf952d6eb1ca6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEXO22234663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5301366717bb8075deac74b4449abd81d2a5ef72bda21104a8d909e8f20b46c6. 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/DEXO22234664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1c4108e1c29497dbc1c70e3b3ecd5156302996bd8f687456e9cb0e9a700ea0. 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/DEXO22234665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efa5e611e2f3f680d1cb65cc1eee756dd31cb5b29e6f462c7cfc50fb3609a35. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO22234666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5b0dd3fef3f40659b576cff4d9f8e6e0ccae0924bfd563acf04675da04ee6c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEXO22234668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb171da5458fa0860afeb757caf2214d42f0046f3e9357759db3eea7a6769042d. 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/DEXO22234669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9122e60dd0a33942bd1d9f2467e80022bcfdb7f7599b3d2f60060cf2a68c3d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEXO22234670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70766cf2fbf00c8993ccd8eeb4a7667de6effa6bafd035af092d3d7b8a8975. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEXO22234671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac7e66632965434da70b6295ce6d93c6594a80ff611ec63af861286fd345b5d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:01:23Z), 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/DEXO32235441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4869ba646b8a4c089af50add38c6beb2950b1603e4c9296ffb640014f12dd308. 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/DEVU52397618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd17bb8a3e5b7d8327e65b4644c1bd46bd8008727e931b53a047692d4c9cf53. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:22:52Z), 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/DEXO32309529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86ff0f124ba647e9e4871cdc7277adee9e092a2a9c3cc99f4c0044fc72bb67. 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/DEXO42379135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d88d63b8bbfd8308ca1add280a11a5cc9ef2f0ef3345a9859a90845a1f5f4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEXO42379140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c868de1e2e477afb5ee6ffee5151e1c0850f7d8a7ede6ba0f45f25ea02787. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEXO42379141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1044f35f3e7155dd1a4d51daa13db4692ebe35287a5a82ac993b18c20eefecfe. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEXO42379138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665589cf7d15ba18296c0e36124f8de066e9e3180031a1f465f0c8a707e00ab6. 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/DEUM72200879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665589cf7d15ba18296c0e36124f8de066e9e3180031a1f465f0c8a707e00ab6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEUM72200879.