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 0x8eed5f844f3ea0c33673c27c647326512ed291d6ca62499c172be1be9f0e5133. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d763d52-782c-478a-a3ce-a768fb0c403d.json and https://artists.proofprofile.net/proofs/artist/0d763d52-782c-478a-a3ce-a768fb0c403d.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 0x017c64671bef5ca27e484e083d6b02019682a2dad5dc6f45bff4a477ba0e2afc. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTRX2502332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa2d2b428e254d4003d625e557b991615dd57b29808facc610c7107a93f1eb. 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/QZTRX2502336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd25c2e6bb10aebe790968fbdc0fc0a1904cddbcdfa512b697623f8e4f55b789. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:16Z), 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/QZTRX2502342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaeda393cf1e4b873503feac8d988e1508cad1e81385ee87918c06db7e058a9. 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/QZTRX2502351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218b5f229bbfd6c3acf16e6e0f4f8cd2a0c488f9aec38c16c380ba5688e7e797. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2502355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676c081da2be32334a2d8c3a2a17bd6b8358b2bdafb5ce672cceff46189cceb2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2502365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bfcc1842078c5a9c84fa4b1465623547cf0cdbde0bb42aebd2c33468a48a6c. 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/QZTRX2502368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03673d713ebd9ce33e39b92714832fffadd411d13a0a60158137dd7f007ac6d9. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTRX2502374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6714052ddc2f4a4c425110f9c48194b6c203abeb5b8aa5e5d03b06bf148c5f44. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2502379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee680e8d79b0e234d3b04a36fd31e30d0b030175c10e4fee2a7bd62e9203819d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTRX2502388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd95d66c34bada74454072fd8064552e38e73f2047c1ca7e8418d80ec0f8c57f. 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/QZTRX2502396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d12ee9ba472decc3fd78dd573ccabc96a52a1f095e171277b1fa19c19c7763f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2502404.