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 0x4f19f2f8648d51719e286ed2c4c82d1ca366bf4df39d56a75ba6f28d421f7ada. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac61eff6-1dd3-4dc9-bedd-9d01c4ce78cc.json and https://artists.proofprofile.net/proofs/artist/ac61eff6-1dd3-4dc9-bedd-9d01c4ce78cc.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 0xfb33f6679790f2a3e3257014e068ca987cb45b173d55412bb7d939621808cfa1. 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/TWA539516901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8d24e1031e7f95a1e7284c6ce476f9388ebbfcfde554e015de54878d0f3f2. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T22:53:31Z), 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/TWA539516902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dedd253fce36da82996a3fd7c11e3fd1ea9d6d54809d605701b866d89f3abc. 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/TWA539516903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58a09568b5c8db96845b0676e31950cea6dd9fdff20b7ef2f936643b61b1f62. 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/TWA539900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bc3b236f542daa32cf35a453988bf843306bd48d6ce50762237db5770c2d4d. 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/TWA539516907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6df08089bb6ae6da19bb3c8d24936d33a1709e48afa88450ad3ac943479ef8e. 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/TWA539552701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbccc08e520a96562f3a4092de24a1079dbe4aa84690d5b60edc7db7d376e675. 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/TWA539552705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b97a1177e4b0193de33928659a12bdbf889d7c7c21cd1356f9a22a9aca68bfe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:31:29Z), 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/TWA539552706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466b06e9865ba7d490844b29b6062ce0e54d89f761fb25406ff5fd0f362e4b7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TWA539552709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ce6494114c554ca4d22e1cf6aab36dcb54753bfb4e7e0c87f794b28b0fe61f. 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/TWA539552710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6aa28e17132fb926acbaa17dda11bd3ba28cee25243a38d110956025b0dbb8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TWA539516904.
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 0x06c4ed55bf65514bead8adeaf6e54dbbc558df200e14c468090cdbcd8635f9f7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TWA539516905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8868f6590c77dde31fb3427e1bb56bf483aac43f20eb1540a7e56aa0153df6c3. 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/TWA539516908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5de79e95b35cfbc2ba49c3592141bf46140652b3e23b1ce124712891b9a686. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWA539516909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4e60bbebd3752507c84cecf4ad73ddae463eef27a289266438849136d848d0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWA539552702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7672dba92287e8097a793977c33f1492a7f425f32e8983c2bee32dcb56055e2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWA539552703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda82363b4c09c845faa941557cadcb4e7086b6f246180ffec8b25883e7b502a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TWA539552704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eb5c70f7bcc62b1138c0ebcdb781183c2dbc813e18a78ae5dc187b3266d2fe. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWA539552707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0deb435a1da2c6e14a12edf263f4da4a04a80635a24e857b08f0fe5c8e60dc9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TWA539552708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df880b205e2e3d917aebb307c910842929af5b8ef6606a375fd18df589ed5f8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWA539317401.