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 0xcc3328066e94d31c257ad17b9f7e99b137c1656657cb0453889101ca2ea8b72a. 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/8989af64-fbd0-4ed8-bae6-f7fc503aee8e.json and https://artists.proofprofile.net/proofs/artist/8989af64-fbd0-4ed8-bae6-f7fc503aee8e.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 0xe55ca48bb2782c3ac17f4c0668fd566f04bfeea4965de45adf5bcb781d1b72c4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USQY51274308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12347f08a6bd28aab79a84c451c3791dbeba8589d174956bd794a2207abde7e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:02Z), 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/USQY51274310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd220cd8b4a7faf6bd2c617884ed08a7e942375909ce3cdb2a6a59fc2f11523d0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:04:15Z), 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/USQY51274311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f56dcd8ef925fa4a0df29114684ea6b0129b0f9c2feda535f0b25de7efa18d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USQY51235399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900cc347adf7917ac71b5b5207f423c587b70fea5332355cf8f8962570b35055. 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/USQY51235400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fde00dd299ad82dbc1fe1aa0834c0fc85cea8696bcb7b544a11670097498e9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2P1699893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe212078b0ab60614c2f02b5dfa7ffd58f524a5fc50c29b01378ce9ec9cfa9fe5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2P1699894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d2412603c96f3e81a5da29d668165b432edfc47b1eb767d1a1475ef2eccdba. 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/USA2P1699895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93558136c47437b185bb9293701451ceb957175e980d4662b3cb0059ad6351f4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2P1699896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9ff0a9a564bf84e4b28d84cdc111b8fbd6c8e0ffa441e13401cefd1de141fd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2P1699897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e32c2d7f8cb0b690d1545f834128d4380fb7bc15fcf9d06f24fd54eabe50a7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P1699898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a6275d60d5a8a153bc2fa6232f7b8d8f460b566b296d41157f1e7aaa1b78b0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA2P1699899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a00d09f57d39e1d7a789c8fb4b92d0da447199b9c8ea6fd29e95169b8b4412. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:14Z), 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/USA2P1699900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbcfd37056e3e14d50e6224f9fca731bbbd294ff39582a71a9e5db01f93ccf0. 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/USA2P1699901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7425971d3ce19aeac79f20bba0ae967afa73e0f46d172460d834517f40ba49e. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QM6P42228600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b98a6d7e2ef17890d7482e0789a46855bc8552853d7d8a918fdff1bd591a81. 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/QZQAY2308301.