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 0x437881ead0b249607e3c84876198a3a32721d8328f3e570c0ae42f954c249547. 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/133ac7d6-0143-4344-9bce-a32dabfb8bfe.json and https://artists.proofprofile.net/proofs/artist/133ac7d6-0143-4344-9bce-a32dabfb8bfe.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 0x7b00ad2dc1faad15d2d083bdac96109299f3eaa454403680da61b048eb6209ee. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/SE6TI2176454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f053769e9f8778c1a979818e5f88afde2ea765050feb16843e3e12809b2ae48. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/SE6XW2128440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c38c31c6d44024fb36b51c9e8b39b50315c26a907b8f033cda3818ed1cfe1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/SE6XY2133940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9785ef26da5da47c59cf3d33768a12a4360c20993f739eb3c3a52d8098168192. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:37:12Z), 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/SE6XY2134967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7804269162fb95bd96b82bd6c736f5883b1ae5ade91a31c04f85c2ca590062. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/SE6XY2161286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b0d4c9aba6f98d313737464d42a2d0f7cc07f4c527164df549c724f73421c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:18Z), 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/SE62M2174845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e150add8b0a7741d6a95f5bb7566e0ed6c482dd64c19b293f7a7e767a0bc16. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLC062224016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13459f817c47871ba159655e3f3e5c5ce35fce53c74d28a995f62ff2c99861e0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC062225308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02826b67ad4f5f25df26969f46e6d0193a278e19377d45a965522226bffbf120. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLC062227214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7b04214f9555e7b038fcc827a0f76f940f41caac26f3ffea8f59ec3e1fd52d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLC062227936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292ed8b4b6105cf52c95f8a7161f4207a69074f8a547874f848300033aa109f6. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/PLC062235136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7c31cfe6bf5649aebc5a846ba66ff39aee8680e756287b7cf9abd6e0cdf8b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC062236112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb57445cb29019cf97fd510f06dd0407421f32c16ce94e188821fd3a18469263. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PLC062243902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ecb912532f4f3738474ca47a2eb18fdacb8781435dbd0220e4e221ba21340. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLC062254944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517fbad8c2fbda7e133287f4b1f556adf9b1aeccfca76417df6658829655b90c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLC062383768.