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 0x6a0770729bb56ed0b343e873be6d792c370b44369df267f0cb57fd84826f63c0. 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/f8f08563-0935-470b-8e28-f4ca03e1c525.json and https://artists.proofprofile.net/proofs/artist/f8f08563-0935-470b-8e28-f4ca03e1c525.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 0x9761e20a742a48eaa2de9aad2d0bdc79321bcc8e7fe7c8fa154b0ec0fe77298d. 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/MXF600602878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8d4ce5b4e4ec572fe7338c503dd30d9b92a29b58e994eb7d71614e8415d179. 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/MXF600602883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26afe8ee1325d7264848ee32eb6f5c3d4456f927d8dead12cd8cc96c1fae5e90. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/MXF600602884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df44286e1653e28bed98fd5f71ab72340b0839ba4fa08c2b6a308db9a307de. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/MXF600602885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc80a726ae73c4ff03029593509ee584c5c48c639dca658ebf1fa476fbc481bf. 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/MXF600602886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80904fdb8b8c5922f57b648604c5ed792c83f2e6d6a58c434b8c4a60c53fe64f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:55Z), 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/MXF600602702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133958c87c03140cb8ef04e18bf814022f20f47eefc2bb813811aabbab6df9de. 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/MXF600602703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb17c1b9f27b297a93a6572107a4d80b86f47373d3d1c3d799d23865bb0dbe. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:36:32Z), 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/MXF600602709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b84bfabdb1b5f79917dcf11f063c203fcbd92cb214dd8e735720030394c92c1. 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/MXF600900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8f27a534afda5b652cb6199d3459ddd22590558b5d3acc6217212656c69eb6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:32:07Z), 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/MXF600900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03d99c20b8e06ab6a6f0c8a9f11ce13203abb60d36cf78772e1bc2775d3b26b. 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/MXF600900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa03ad7b264559e17c1f0e6d4bb77c7d173dd3dfd42a0ccaf5f8c3cbb00f6b5a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/MXF602500002.