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 0xa68570151eb2389f7944f19cf493f9a58b9f3f82bcbf7c039051b1a5868d1261. 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/e84103bd-89fd-4d21-a23e-bf0fe6356f18.json and https://artists.proofprofile.net/proofs/artist/e84103bd-89fd-4d21-a23e-bf0fe6356f18.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 0xdfc37ee5ad07bbf84a29fe002872ae7373f6d455d63f1d94ac9687ccfe15e58c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USLZJ2484314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74db752238a1f7240f1b6efa293234f03cafd42c10da421af833a4210f690cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USLZJ2484315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3aadbe7ef57fa423ed876f0e1866dfa49494876ada4da9f10d7f80fb086325. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USLZJ2416025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcb54271dd141fdedec7e09c577ffd7215eb9c24ed8a12dbc2d827cf9aa836e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USLZJ2456959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d4d9bc303d275b314094c28e7047f39ccdcba48c9987e4c5a4f37991cea925. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USLZJ2484318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861632cf88773caf72229f198a52d627c70dc318f4ccfcd9d32c8386c623430f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USLZJ2486904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61221db8bb3ea665883ef531eb1d35b55a81138152d0d195fe0a72b74543f515. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USLZJ2486908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f012d361b49e5addb3d976f5af6647d9ae7f867011ff13746b7531852dd2bce. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USLZJ2486910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5072191b5f16a3c392b8a84ece8c3ba63a848f318a407e209023530f099cfde2. 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/QZL382377515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04e5f3c1afac120015c6add53ef7f74584530ebb1a8e981e6c83bcd599c8199. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:48:58Z), 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/QZL382377516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be5941334a5db3907324a5e93c094fbdb6859b4b77b817d4197b443463b7a18. 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/QZL382377517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a82d5fe49f749aadb6dd4fbfa50ca3addf4dbd87c5219d26779e5a5ec7e57b7. 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/QZL382377520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028677a0f5151613f1938b55dd3f7baa6d93b55100dd6c77223cea9dc4d7ceda. 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/QZL382377522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4032d553933231f46dc454a56f170510c4e51bfcb23177d05d876573ff311b16. 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/QZL382377523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef76c2cf8732fad8f90b8bdacdbb5482c471ac37e616c7bf30c54b6f81a7a68. 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/TCAGB2229635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda336c8838dfffec5875700f0fa220cbb44d481bbe70818267cec2bc69952055. 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/TCAFG2037146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7906f99b3d17675b1c7f49e132d0194aafbbcd83a3e3d95d616bc092f8ca995e. 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/TCAFG2037155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe442994a2458e5c86c56cfb4af3da0ef71be5125df52b78c262ebbc63ae23ce. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAI371723002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7c99b38a5e91b86205fee7798f175d64f48161222e5fb337662f5cb0bea960. 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/CAI371723004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7610927aa89a31022a38886f0afe5535b1deb69a6fb133e61ac60a9febdae079. 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/CAI371723006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2726e91e439c42d24e9f53ea3b5521bd0cb1bde3f563b9b6b01d224a615caa5d. 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/CAI371723007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503d6db58406611484e3ebfaae11df520cac9d8d3235561827b47f5e939b1805. 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/CAI371723009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d4d9bc303d275b314094c28e7047f39ccdcba48c9987e4c5a4f37991cea925. 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/USLZJ2484318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcb54271dd141fdedec7e09c577ffd7215eb9c24ed8a12dbc2d827cf9aa836e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:47:18Z), 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/USLZJ2456959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3aadbe7ef57fa423ed876f0e1866dfa49494876ada4da9f10d7f80fb086325. 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/USLZJ2416025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1160c1cf0dc0a403d818d3ac3d7551437f143a200575125444cabcc2f8dd3c60. 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/USUYG1381149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8949c908aaefd4b0a601e7c8c605ca9ac949f3344f718d958b0e4f31f349386. 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/QZK6L2039531.