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 0xa498f2102c197f9a0eeb9e3f9371c97c780d2a755a94b33bda2488cdfa59cd19. 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/d3c0b1d6-24a4-4418-90cc-38be437685c9.json and https://artists.proofprofile.net/proofs/artist/d3c0b1d6-24a4-4418-90cc-38be437685c9.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 0xcc410a0442b4c68f42bfc1f8de331bf7aec2cf085d24b77e112051153eee9802. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEF1922546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76d47d398312d8cd3e77208c8747f33665eac1b8901d9c087fdd644e5d454eb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:02Z), 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/FRX202146197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db79b9e179fd42dc4249931797cc3cc836bce10cae25b0c5b70237c8acdd9cf. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZAKB2169729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df23e77b00ecbad2b00020bc781a5be76208fc27049ec7640f9fee0ba86cb9e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:25Z), 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/QZK6K2498940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf87da6ddcbda1aed676d2cbc81336bb951b0e598c51d93b0cde1f2ccd187a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFQ2442832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e8144ce79a6b05b5b6dd9eb2e12ad6803bf11cc7a282706f4741a5b62b203. 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/QZFZ72440185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a55bd90a69bdb5545231abb1f1f6e06de37265623eec0c1af9c67e31cc6757. 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/GBX722000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7252900ad37949febcfdf81a430a4f4499cf624c855ccf58963f300c707abee0. 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/GBX722000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd32e768b10f4e5da31999dafd9db4de3a457c37e3e90e3fdb1a0c814970f20a. 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/GBBPB2300589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ecb72cd974645ff626fc86fac5c80a395d9418fe92dfae2c4a7a323b0f368. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM24S1916354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5893b616123ecd3c9880951362257a4c4b5e418be8cf49d303e53e35ce06c506. 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/QZHN52496922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e8144ce79a6b05b5b6dd9eb2e12ad6803bf11cc7a282706f4741a5b62b203. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72440185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2718b61b9eece42493c73821b0afef8cf6f60d02eaa0757f2f22c2f480f01889. 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/QZTLA2416923.