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 0x692abbd3414d63561208785fd46c9ab28daf468d94b3b03dafc456c8fb00bac5. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c864246-347a-46a1-b6c3-0d8f01a0bfc4.json and https://artists.proofprofile.net/proofs/artist/6c864246-347a-46a1-b6c3-0d8f01a0bfc4.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 0xfc9cb918ea12ee6b1ef5deff56aca3216c4f08e9cd35143544e94253765dae63. 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/GX8KD2548286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e600cca5a4467e7ab89b5093fad75766c4ab70f07a9f9e050834929c05aa4. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX8KD2588634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088aad063db39d06220c5cf01afbf6da33b54ad0742fc80643d47b2933233f7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GX8KD2582811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb742a1bb88fd1f97195c6ffccbd4da370e28c67d74ed46b9ba6c619f7b901df9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX8KD2513365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf500e39b524efe56c9ef81fbdcff41fa2fe5790ec7e95a1b239b1f53f747ab76. 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/GXF972437279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4d6871952908527fcff2c542ee5229126d0e5677d56144615ab9aa67cfbbde. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX8KD2512913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4d6871952908527fcff2c542ee5229126d0e5677d56144615ab9aa67cfbbde. 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/GX8KD2512913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe127cf44b37bd5b0a37aeebf0a3bdd12031981164d0a68a489d05ac3cfb18f27. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GX8KD2521917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c0d7797a2d2f4095a8120ea6754d28c12cea5e73bf1307e74a95e475d370. 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/GX8KD2517154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3631e2e997f7ca1d50af3a1a52b053679c14748c1f180284350a79350139dc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GX8KD2571521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e600cca5a4467e7ab89b5093fad75766c4ab70f07a9f9e050834929c05aa4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX8KD2588634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb742a1bb88fd1f97195c6ffccbd4da370e28c67d74ed46b9ba6c619f7b901df9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX8KD2513365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088aad063db39d06220c5cf01afbf6da33b54ad0742fc80643d47b2933233f7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GX8KD2582811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60d2f66225ab95a9cc455703b0fac4104a3c0ee9e9dc107d2e3893c2b19a49. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GX8KD2519125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef20b1b264dd83a88efa19d650a598728c33f32a7fc952d6a38f66a0d951427. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX8KD2519253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4bd79fdfeda85d984b3f26eec10772c7f689d1b6c0cfe774ad50c9160b7741. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GX8KD2510174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96f80cca781422216fa4464608c5a79a3e3c4636bb9763ab313fbba95eb8105. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GX8KD2575017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cb1ded69101fc895d85429bd4d4287287b39d81d68f3e4b82970598eb4a21b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3EZ2515839.