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 0x3c62c801d2894522d7242274693005a824158f85ce2e61ff7a4bd2e53d54585b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75a5f072-532b-4300-9d40-403cf00d034f.json and https://artists.proofprofile.net/proofs/artist/75a5f072-532b-4300-9d40-403cf00d034f.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 0x213b1018f32713333eef2e06f621b7581cadc9f9874c22d6071337da5366bfc3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USA2P2435574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d11275cf67d37ff1954c29695fe464aeb4dc3112d4bc3c6286ad8d5da0120d. 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/USA2P2435575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff9fa97be77deb2932830fb4dce1f271a8d104d7e85ef64c32be639e5edbda3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USA2P2439068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe247bce3f8f3bcdb63a6824885c48b7bd6f9c521a3b44260f15f8b45682b21. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USA2P2424304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405c989ca810671373d2c24b507c6232575b9065fb04afa14798711abcfb5357. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USA2P2438487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66106adc33102b4cb44dcb2686b1c2c62655c3e83e4a1e23b6f1ae620ba57f4. 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/USA2P2446126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8c9b22c998971046915b3d36819fb344689b18da4246551f7caa1292ed161. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2P2501534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa432a9152848f3a16277438198d8a829e2c2b0df1f5d5fae1b9a66d0cfaad8a3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:35Z), 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/USA2P2501932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8c9b22c998971046915b3d36819fb344689b18da4246551f7caa1292ed161. 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/USA2P2501534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa432a9152848f3a16277438198d8a829e2c2b0df1f5d5fae1b9a66d0cfaad8a3. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/USA2P2501932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8c9b22c998971046915b3d36819fb344689b18da4246551f7caa1292ed161. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USA2P2501534.