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 0x68bd25f7051eb0b63f1a3120a74f12c28c85d6907ded05177346e265c1709fd1. 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/5590dd8b-4359-42e9-8603-f3b336d8fcb9.json and https://artists.proofprofile.net/proofs/artist/5590dd8b-4359-42e9-8603-f3b336d8fcb9.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 0xacb38daf657354e433a9985017e0ad4714fedd88e9dd3c078aa8499f9b14dc61. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZES52301607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ff0b25b496e0e0410408dae04390250cae146bb5d02a8adc535cb6654fba00. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES52301608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7579e0580f203eb1bcf10dcd1123fc1baff66c3dbf7ce953eb88afafd37533. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNWU2354090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf4c82fca40fc40721c17cfe480cf69185948aad8fdeefd3db2debbaaf9a1b6. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/QZNWU2354091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31570899c0ed4c6eee22c6f9a84c9925f9c4fec36060bdb76e17ad229ea08e1e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:36Z), 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/QZNWU2354092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5cbff91415c8016fa334e38964ddacb0fb22dbb2d78ff6e0a9328ff5b4ec8b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:08Z), 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/QZDA82444712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1bdc0439a248278e9daa8d1753a71c902e0176c7e7020f9e7c5c0adf3b606b. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZDA82444714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7521c9858f7ce1ca24129d50d5c6e9aa2f628f0cc5019e6239dc6461115ed2e0. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFP2427743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9221ffb6a487ccae1aae0a342dd9651773f2fff20dfe36f868b8b75b8ff0febd. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZWFP2427744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0d697ff9f518964b6639b284a9844c405e056d29e1bf35523baa6de5817f8. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFP2427745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ffa07dec360525156b2a1899daff50fbdea8954d0d4fe4f5baeb45836c689b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN32533798.