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 0x15b3149b5cb1f72872548039e1d00fa18bebb0aa5f099e5d875e5cb0636bdcfe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47445b98-485e-4529-9327-f08fd1e21b7a.json and https://artists.proofprofile.net/proofs/artist/47445b98-485e-4529-9327-f08fd1e21b7a.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 0x8f4870d1757fd70b161b3b41e2f7bf67d923f98fddfd0493313766461cbf4a5a. 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/JPL542400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3fbc19a86a8b4a17be119b27e104f94b199f070c42e9eb4f1286dacc9f08d4. 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/JPL542400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0df887bf224c9342d33d12bb28842fc2ec7d10f89e0842acc252d4629ab134. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPL542400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1082ea5fe89be4325214fb60ec6947668debc11d4a4df41022e244f271110e9a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPL542400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fe07fe2a5bbbfc8894625a8e7243f6fbfb9620dd10fbafe305561348c9762c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPM792002307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fe07fe2a5bbbfc8894625a8e7243f6fbfb9620dd10fbafe305561348c9762c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPM792002307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775d58b437989b0f76115e3892378c8dda003546c01c319a094cee8f773bcbce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPM792002308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc1127274ddb8a8d1c714f953eb3fe1efff37a2b7c668829e37afdae827a77c. 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/JPM792002309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bc994698cfc216156bdc9752df6ae21ae500606e3f0575db57b120bd72b230. 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/JPM792002310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c723fd298162289bf6cb8a06bb8c7e9d8959710e73880f787db9e7f3a42727f. 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/JPM792002311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847594dc3e1c9548117c1bce09557b7c9621c018a8f7500e376fff25f4e29ac5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPM792002312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff771808fdf67562606d47c1bbe2ab3541c62ff84ccfd2647618171bc2dca8cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPZ922011468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bcfacc66d60a92cc51bc56f03f18ce2bb12e9890daaf8a7e468f64d2805245. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPZ922011469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc7e4c3dce73d4b7d3cf6797c89f96f528bad37755433c169e636fa5c4be854. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPZ922011470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdabe11bf4a03cbe9295fa6809e03a7cff1b67d5e7374c9f929339e901a86926. 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/JPZ922011471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffba0978b641cc35b3c01fd6d949409de7a1fe73bd1f88cf426e780eed4b2649. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPL542401423.