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 0x10c2cde9fee22307f6aea5de3145d41b0d43962cc30a7df784dbd443344a014e. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecbc88ec-6a5e-48aa-8d82-21eb0a043d8a.json and https://artists.proofprofile.net/proofs/artist/ecbc88ec-6a5e-48aa-8d82-21eb0a043d8a.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 0xacf8b7c75ddb7d03a53cbf4eed0422798670c64198b4c0cb1c65bd49c7d7a097. 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/USFHW1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9623416864ad91e56f89197b85f858c119e71b6903804989c9f4dc98d8932b21. 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/USFHW1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84018acc87bbbbe556df2b8e18ded7f814b57b2501fa5cb14b1d29482be28702. 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/USFHW1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff35499df1865710c369078ee875548da2c529d825b6b8e1040355c69e89e6. 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/USFHW1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad92c30192313db8bce6b25d469711dba7e9e43d879f0902bc202ec3cdf3b0f. 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/USFHW1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5be845f8a64807c17fced88a6878e5fd8dca374947486ed574f4158dc3f5d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USFHW1200007.
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 0xa7d0435cdd1e7677d2106cfc9bfb8d08cdfe6f1c3d1f6f63acec2cfbb65ca87a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USFHW1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72b8a307d586b191bfa5edafaed2e7576d12374f745481e61f57476afe87026. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USFHW1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c542491c2102ef8f622509114ea4fee6bfe814e44d139a762a875f63c5a41a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USFHW1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58989e3fe30b2915b1b684ea89bb7a17557921f74671c219a522440fdc04ab78. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USFHW1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344f9dc0a511278d866a0b178459097cf6d41d1d07a9b75fede9187a1d020cb. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USHB10512403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c9ebdc21a7aa22fe838ea47a54683ef89a2630f914684eafc2482b9280729e. 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/USHB10519306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413474b9814a1bf5b79f468c064712445e4c91aa139009cdbea8a207a58557ed. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USHB10512401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ccfd7d8c036cc8740095eb5f53e281c25a16bd974160e30e9f0b25d75ee865. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHB10512402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a18eb297633cee0083525da94d3fb5bca6d3841cad18f053779f7a4714d41d6. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USHB10512404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45694592cccbad7075924727f8c617f4452b6d3196557b2356c90e036ec069f2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHB10519305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b2c229327eba7925524ab52f0c06903256f436c24230e6ce6a485e9b85ebbe. 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/USFHW1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295ef12ca1a967bb0e40f9eed043e67805f9ca7a70f38aa43d98bdd96ea242b0. 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/USFHW0600320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f0a22cf77b15fe27d6442628d27cc3e82a7487a46f7ed878468e993469dd56. 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/USFHW0600323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a6e9fc6bf163551b25e321272c27a80faccc24b6c9192a6203b97e25fbff2. 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/USFHW0600327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24ee23942dec72d883fda4f49b5de5f041439009ec51166b8f2c9ddaa5c9df7. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USFHW0600321.