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 0x4d9442b3a0400697f64aab599efedfbe35931e1c6e3e507b404609adf1fcd876. 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/3278a3a1-3dea-41d8-9dd4-1f35cd130321.json and https://artists.proofprofile.net/proofs/artist/3278a3a1-3dea-41d8-9dd4-1f35cd130321.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 0x156413b289e89d860f53a6ec71e98cf7c0390ae63b7d8319f5624614799793df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBPP1602102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb72d379e101fa188771746853128e3dc5d2e1914f70ad1e809242c2613f42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBPP1602108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8406ce2a6e815ce760bc6602089add13ef535e0f69ce3db279f0af038e490dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBBPP1601504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13621a57715d1f19ba4538748cb2c63e3ec17bc00c648a8cd85e335476d5be71. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBBPP1601517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d7083d0ff14b762f67cd36ea4b7c0f541275dd90827e7a5d9e2d1b08eb2b80. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBBPP1751774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d23e86ae631e92317a4c5bf6e4cf962684169abb88d20fc5b6cadee3d190cb8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBBPP1501305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba508448debeddfba733180d29e4f5363d739d24b1df5c9d7ba54aa59957d865. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCABJ1294722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b429f32376661d6e126c9607e2e12b4ee64bb87d71e604812ff09c060d4469c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCABK1201195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955fa3931ec0f3dc5f77751ef94ed424c6a9e0206ba04c7f4fbab561db887ed. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCABK1201371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eca7738d0813b6d9dcde59527e92a05dc0b9c45440ddb4adc65866804d2c0b7. 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/TCABK1203067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d2766b50d16aba02850d7a997fcea157f206f9729b0064b2288f5955058bbf. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCABF1220517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818af7f3d3ca47690ca353528319d51f2383d4fb9340caf4965983a058ef6dde. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBBPP1854217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebad0a544aaa0c55e2290a29c5054e4223dbe392a14a5f4658c958d046c9ced. 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/GBBPP1854222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf569365aa5061e287a15972b55edadb5513f6e4ae2eb031383161605bc780f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBPP1751683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2409a7073c9715a9f0bf9c871de3cef43cccd4a69f94aa9f8f450bd62a0a606c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBBPP1305001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c4a7096e69c95482f4e05955cd0123528aabd9d1078f41399192dfd64f6e8d. 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/GBBPP1305008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cff3a332676ff920669b6bc6a176d1a3adb59bfa54fb05f69831027f7d6cacb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBBPP1853069.