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 0xf442e16d2eee3fa5dae7a64edd6933df7d3f1dee32723084f3176978a3bb366b. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edcaec9e-2671-40d3-bff4-88b7303c5fd3.json and https://artists.proofprofile.net/proofs/artist/edcaec9e-2671-40d3-bff4-88b7303c5fd3.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 0xb4178ffead3dff82e2f89804b878cf73673123103f80f57b88119e8db8782374. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBLPF6707228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddc832048a9299bf66873a3d071c155f86c3c436462fb363c2454e8dffed1a2. 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/GBLPF6707272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79e3999f90039fa2c02de3cb038562c46bfdedc18582aa9adf02e735d23baa9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLPF6707291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8313e23187386a75c613733a0365ef0f538b0b6b4b4a5e232cd784dd4ef707. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBLPF6707328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6febdcf820a5fccf3c2a25e3c0b257f8a9218baf7089197fb5659442f2e2e1d7. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBLPF6707340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf670618795a7a2f89e5b9ca34a9f7ff5bf300f1458ce10134b6e9438ba1383e1. 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/GBLPF6707341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63167d569e3545d85df37aabd704984b60fab88975894f739bb064c6579c96c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBLPF6707371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c461fdbd7f0e66bfb07dd2ba5e679fdf5d1baa7790c9c766a0d4874957a2d3d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLPF6707407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331eef7a74f7df756f6874751f587c3c77704a31bdb801859857f2d5d0f4cb51. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBLPF6707417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8364cc29b8f67b89246e014743bc724141c11793482b2996e3857a19bc7f8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLPF6707427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd515e4da858eca673f4ff84e30315257ca4c9e7e3da06027981e37ad70fd8263. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBLPF6707436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49617dcf5a98db389fe743f1526bf467dbd5712f1714ed63a6fccb0a57a48875. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBLPF2401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8930bb8d50547de6e221efb462ec38bee172a891854dbda4a63fdeb26766d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBLPF2521229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c758b39b47b75d3af73eeb794f8aac29a8977506c5310426030002b704c639b. 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/GBLPF2521230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6378fc640198e1672bcd278fc72df6f78f43257dcfc1f0f8eb7f6eaafa51046. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBLPF2521240.