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 0x378fa22c724b36bc2dbd7e30e1f61ed71834b6d945af1b1f0431435e89b056c0. 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/5704c162-5a40-4cd0-95af-e9cebe8ad708.json and https://artists.proofprofile.net/proofs/artist/5704c162-5a40-4cd0-95af-e9cebe8ad708.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 0x121545002e2e602df4d7a6136d38689af14d9860c558f17e79d633d3f41f92d7. 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/QZJPM2430598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaef195b5b2e53d6f552a0672aeafa8dd3f8a22ab128f80488ef573294f88b9c. 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/QZTAS2469251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660a8d0b730c13803538c7d30bc1120865e41795ce1e06016c0e022182ddbddb. 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/QZJPM2402133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3830178cba2313f552830e840b9ad1ab9d46c54384e2edca49d9759a6d6e8c. 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/QZZ972479562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457da1e46a1b73691f333db13da530938deaba45eccfb4e004245a4661d720cb. 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/QZJPM2401889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc058991cca5b64e0ed32936cde88cb81360213570b806022671714eed918a2c3. 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/QZJPM2401891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea33003323b3bcc9e0d2ce433f06a74c682c6b2542c9a3f811860ee304c591e. 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/QZJPM2401884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b69244287eab1a808c61c18cb0e95fd19c4f458f0e129846da808056d7f371a. 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/QZJPM2401886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cedeca8688732e27e9672d68ce5105063e5889afc54845a39fc0334dbe83a10. 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/QZJPM2401874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eef24b504707e28be5a6921aeec84ad8e7d26add60111b02cd32dfafb4f46b9. 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/QZJPM2401876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e0ac543a9775f999474439044e15aaf3a25c7634b463082a0b5c9f40a4dbc. 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/QZJPM2401870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf297098683000309079f9b24cd5288bf640247a98043e1eb8f49b5ac82d5143. 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/QZJPM2401872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657ee9f455dac8d352c2806594493655c9efa9043cc943edd8d4f8fa77a8dddf. 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/QZJPM2401880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c9c90b8253f82602e10b00177a93768c3c156e4f91207937e02f0083d3f320. 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/QZJPM2401882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151483255995ab07fee3e769f7ce2b97b4e6d0f7f56e159bba2c16c37fdd6051. 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/QZJPM2401883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d84fb112984a7bfe02369b102d4b6d4ad62362b6580c827db0fbab18e3d6684. 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/HKG732421646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3ffb82b856b3d0572486d86995483d59f7bcccc97836f56561a753205d97f5. 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/HKG731676530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8189edc209e6a85184d4cfec214491b08bb5d8501e4ff7ffd55e60ca4b73b2a. 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/HKG732138291.