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 0x2ee4468a3fb4d425540e98800b2571b4fc7dc3cebcc747956ece65d2e278a6ee. 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/fe1cb3b3-e48f-4b86-9af1-22607a9693df.json and https://artists.proofprofile.net/proofs/artist/fe1cb3b3-e48f-4b86-9af1-22607a9693df.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 0xe947a8289effbc563bdfd647849e8df303f8f7e83c277828cc4a2de8675360cc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZDA62193357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477beac3b3abfad068a998031a677d5a5af3a89a138e2175d26d8672e8598d9f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZDA62193359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b096defb9430e2fe22515a0ffa52b9af718e9e51724aaab8ace6136a1b09c1c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZDA62193360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8046f9cf564b3698b8451243589ba47536cb00bc2b328f8ca4d7038ddc4af4a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6K2174665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70199cceced0a311d74a1adeeb557a880d3cbbcfd4258d99388c1fb8bc5954ef. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAS2102421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eeaa99fe6f4da1be58cb9f57e156d4c95496c74bbec4f26c96cae65f05e379. 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/QZTAS2102423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861962c8b88ab502574d371a7d33d302881ddf382520bc6ec0cc7d3dd0f9214a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZTAS2102426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e2cb9a8057522e8b573a63ba9d853193dd8969ce02ac50e9f0593c52141b53. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZTAS2102428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67241c7733f933130b79e0379228373590e249923cd081de47e43e775bf7600e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAS2102430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3391d770b437da1543c9a7efa1ece373ee054ef7a99dcde55386d985703c4b3. 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/QZES52254651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f9b4f7a5fc4b6f8ca31d598d88410a8a75296c035b79f41887e9d250b79f0d. 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/QZES52254653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fc901f74e72e05b6821facbfca6a64c7696fae2d6f31550edee3d108678719. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2337551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d422c3ed71149db5d4b342be756a32754f053088941b6e5a7788328379af05. 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/USA2P2337550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373153ffe96370c5d30a64126f91e936bd4f596e8f581198d3cef677a629401e. 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/QZWFE2366374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0c72c84f0ca2901d97310a81294ba24066448156e6c8c36b6dcc30c2e10cf9. 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/QZWFE2382918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba5c2b0b17a773146cc461f1e5195c5e665a7c30e260053db3c0f1934eb5e4f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZWFE2382924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6e82692dc0f0455b976633a522bcd8c0b8f9566026fb31a90f67b3b1462ace. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM4TX2420268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2ed98f5e18284f3c5c7a73765360f58761ad8d66068af4564c40ef312120a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXD7V2278393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d88f3345f27b9482def92c6d39c12b57aac6b53c75a744701294872aec9a937. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2504006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0202efbdb85d3eed551db934b3b29989a7838ae820cef308f833cabe81615b6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CA5KR2504007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3f8253ead786e5d06251fc02c7b6359ccb86516decc4fabda34a3cad180905. 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/CA5KR2504008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ae3180a795b4048edfaf8492e2afb1181d366e92807634c624db92bcaaae63. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CA5KR2504009.