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 0x4ed6393fa605fabbce9f1eb2e954a36628dbd5230a9b0cad0e26593c66ad5dc3. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9717e67-57d2-4077-aa46-64e8ed686705.json and https://artists.proofprofile.net/proofs/artist/a9717e67-57d2-4077-aa46-64e8ed686705.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 0x306b4990933113dcf9eea0382869910667f67b46c6b3ac899ae7d164df7d8727. 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/DEZN82369418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abea356420f4b69ff7bda71f6e03a7df4e1bc9852c8b097fff59988d86e7c62. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DEZN82369419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2658235641fd429c07f8650f64cc8caf78c3cae2daf48e0d9a14a7cd565c48ed. 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/GX3HH2449107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60355790cc1baf6d5ba9df78fa623fbf980b19c938dd9d9764ba820ebff0da1c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMHP2409540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c2de748d3147e75586fc04765710cb01f21ebc5b7d926c0e2fa8985db1f680. 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/MXA3V2400085.
Probably In The Middle Of Nowhere - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552758bd1adb149e413b035bad7b2d437d2a00628b24a1821c19a4ef8fbb7113. 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/MXA3V2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40160ce0f09f70bf9b1b485f867c7dd4ae14e81f541bfc95c07457a5c61adca9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/MXA3V2409725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c993bc87201f9bf67832bdc8175ad26ac0925142194a51ebb65f211d27dfe47. 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/MXA3V2409726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b7d814be8d5431ea7c924417a4895c75b227d434bc216c3d75c3f9496c4d92. 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/MXA3V2410028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c749cd5912fb7101cf550975c72ba6c747b51e5ae41d04647f5029f10a306d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/MXA3V2410029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570304f916c2daa373fb7154b3c4b1ff8e0c5e86c047b909e824d4a43835bd4d. 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/MXA3V2435141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39cf356f8555b1e75eea1dbf8991570063332b9113d8b09d385ef81236b3156. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BGA472518206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb3ae0e64dbb91a98b919001bdc939b8b31a7b0bd9430ad8fefc4155c327a2. 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/UK6822510850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b64bbce92423c02dac61849280495cc2f277c5aa08f7e2dadf978c4b38c81. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CAQOI2529209.