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 0x02724b6e8159d7155969c2c4df471a7953a868b7954b4795fb4f6160e003955a. 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/bbb35813-2875-42d7-9318-8982c9761723.json and https://artists.proofprofile.net/proofs/artist/bbb35813-2875-42d7-9318-8982c9761723.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 0x13b74176365b2c69a582b57918fa96dbd45307338e45d414a79169fa556c4932. 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/CH7812410595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd6fd43b678f7c6b6b6ef263c252426eefae51d0ba69d3c372e5abadca8067c. 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/QZAKB2384404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c04a636358fffed4103e8e48e306912b0a0e8149a9bb268103f8ca7f101549. 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/CH7812403548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138e55c8d0abb7eb4e881adfce7a214bc8d455b94163e7252eb567c2ded9c2e5. 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/CH7812403549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55c46cc98d7679f444128981c2730e8d3ab9c4ea24804ece9d1c0dc75f0707f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812403550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab42b71c35431dd27bf241f929965a783a5dc4e186e0f8a7776c1f59ced4396. 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/CH7812403551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc836664658816a37c9cd7bd8145ff1a07ff636264bee8568b7d5059d5cb8ef32. 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/CH7812403042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b1808084caa1182ffd228565618ccd23848138452c9ba70a55849a791f7f5d. 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/CH7812373187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5112846f43666cfc6ebc7b31d895cc5c49736c234268c47fa1dac90620757ec. 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/CH7812371791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5112846f43666cfc6ebc7b31d895cc5c49736c234268c47fa1dac90620757ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812371791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cbd72e5a06b36b71de8be3a171dc7f7536b05718a8eec6da3764394d774caf. 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/CH7812369912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a86eaba6649e6943e3884965f23ff177791f11720f81b90c3b8bc32c9fbe6. 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/CH7812364950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf27c29bcc7e1396ec5494e605c95b1890ff7836ef7ac35854a163a6ff5edd6. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/CH7812359483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0e921ad3c442dda3b59437f574a6e63d1d35187c96f689902c5507c883e0c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA82216378.