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 0xfb51a9362a25d880e4cd260f5738c6c850afd78b7f7eb985d2bf573f3d8ceaab. 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/40e1c6f5-1ed3-4712-9d26-2f5d93f217cf.json and https://artists.proofprofile.net/proofs/artist/40e1c6f5-1ed3-4712-9d26-2f5d93f217cf.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 0xcd5ad3179e1346be4259ca9bb558057e2f737bc0140bc45eddb08aecabbf05cf. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QMHUY1454454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb381df558616461cf1bcbf5d8ac531e5b5537522d028579366d7f1643ed641. 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/QMHUY1455107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07aff2e8d1c4872b2a4b5978c9f52e6d7751f9cd6a4923faab6a2546fd9f97. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMHUY1451079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1da7479b313798e05cb19a934c31386b4d553c296f0ad6ccd17a3a123d9a055. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMHUY1451082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8be869db7654a56843ba8ae750a4c82344f26b1b1df6147d4b2504dd15b3287. 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/QMHUY1451083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94ae85b9bb2a58cb8f5722fb7a337f198c0a90b9581f6c83199fa11efb7040e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USA2P0602663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac93e19c3437ca5422404d9c4eedb93d512c7e84207a2134cfe7ef84286ac1d. 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/USKH40500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a4f958890c8630fcb0a7d354255d17d59aa1be2891a1d1dc64a15150094bac. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USKH40500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10539ff1d45ea17d6413666e572a9050ae5108f0cd9d2876152d40d03b67dfa. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/USKH40500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3532ce5de887f8cd530a21baa18d8fdc4fb964eb360f4fcbf93f5ad2ac5184b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USKH40500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5311be7ec1a374a3c74324ad32bbd00e79ee23f7e9cbdbef4d1d35de0f9f80. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USKH40500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237414981ed036976e31ed43b4c354723062358b832a5ebc412e77c08eaa3e79. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USKH40503665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e44bb3ea43549555baac949faa47e98569419bd066a6b3ceffc9432283f87e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:05:34Z), 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/USKH40500626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf892cfbcfc15862ff3ca2eb4fc40b948ac6c1ae84b1c305d69d5595e903f8556. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:24Z), 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/USKH40500628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5a93b4c0b5b0c0fb22a494bcf23d6151148f9f3a423bd93c07086b95907be1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:40:55Z), 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/USKH40500636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61808427ec1abcb1cc145dae875e1002dd35277e2a2ced121a1c662aef0cb96. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:19Z), 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/USKH40500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b03efdeca031d418180fdfd5dd6262a0078f7b4c1271f30c12cb21ba691c04. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USKH40500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d7e6544c7118515e9546bf1c51785e75e7aaeb0424e8a3b406776960ed83e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6MZ1481895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd761a4fa48f1e251abafd736266e7f42d5fb5ea21a5a0826933da7a3a3dfb350. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:03Z), 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/QM6DC1706815.