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 0x66e4de1ceef05afe5f364c167cc9c5bbae56575502b82ed03f8582f11e7c6eda. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab549cc4-1bb5-4717-83b0-4c2612e05599.json and https://artists.proofprofile.net/proofs/artist/ab549cc4-1bb5-4717-83b0-4c2612e05599.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 0x944bf664e1f2757bfa8944bc6db2d0d2b7e5281743af0de5ad7b34c45bb6220a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6SA2085983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b1fee3009893eecaa0e4450c0ac1f57dbecd7c2e3f7867fa89738f739ea0bb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE62M2129023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8727e64c7571728daa27260fa02b5f0b90bc01c0d3772486d3f7d9f41f4f6994. 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/SE6XW2213860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465e823d000d76b322a0ee4e7d3498d5556c0de4b5078112488da4afde9754c6. 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/SE6SA2470416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b779751f243a85ffff735bc34978a5ef8573038d3d46d2284f853d000966f89. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:52Z), 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/SE6XY2577808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a7460f89b1d3203faea3bdabebc83fe1bc362bbfecd8f32c192c4bde7fe97. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DKUM72100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf9981835a5311000342ff2d9f5556fc24414448c21b0b68425dccd442b26d3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5752444552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaefdbe6fab38bf93076a8c90d16661a7c93fa2e61c64de315694af3143f023. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92258231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf504b52efd2dc8ee4cf1cad5bacd18ba1e7f17c400bd1c1ea43e75ee891f139a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEYOK2023439.