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 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 0x9ff5399668e788f0747460d25267583e5d38b3170c561749bf0e27d62c5c8694. 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/d8d49373-be31-4689-b28e-667c4eadaa45.json and https://artists.proofprofile.net/proofs/artist/d8d49373-be31-4689-b28e-667c4eadaa45.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 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 0x4a4a0bb28b15ab653b41535bea0b98cbbe09d8cec9237c4ff31c9cf44bb9e151. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMFMG2361707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072b9d5b22d22b1975b45e62144a18beb70fc4ba050f5ac82ebd1494241980ca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS652261802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd8deb44f4aa6e6141165d85df0ecfd7848b1e35b7b2e36869e5f058b929925. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMHK2432328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf793a5ed9119a59b0e8be820eb48ebbdb795e20f954585faa4b846aa404141. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM4TX2420624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c896b3c75494e592ebf447f6cae64eac96d1ec2313df9d777e61a6666f97c3. 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/QZMHP2418782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e6e4024503673682dcb848b9b84bd6c3c2ca0f7eef80378fabdb183c38fc6. 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/GB8KE2411664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fb036a3dd3675bfe90545ac82408406eb3c63e02693532f55ab3e7b603e503. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GB8KE2411665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9819de2c7afddbd7cd2db27986fd764458da4e16b3d1942fda8f2ecd07c114. 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/GB8KE2417726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f137e91d2ca4228def5b3d31b0638b151a984ee220a0bab72c325f69f0caee. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GB8KE2417727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf740373ddb5dd599e94bc083c102b50973a9721bb46d96e1e9ef209550b1698. 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/QZN882435372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81691e8aec2e09059ae298e7fe37512210494c9954b0a9f64156007d167cd13. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GB8KE2429152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4af161a0c838b3aa476e31b900bcaeb24b6cab94a8b4f86fbb061f621984bb. 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/GB8KE2429153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ea3dbe60f4cb61758b6e2051c902c90ef75f55b64ec1143108f2f65c6d0630. 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/GB8KE2505108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6025cb1a6c56a8cbcddc57cba968cd7b4d8519443a98d185ebd8dcd13666b5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GB8KE2507388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbf11907da0c018928523e092277166045c3046aa7f734a47fcc0dc35c3f12f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB8KE2507389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebfa4e178e85e767ed65fa3aa2367e5e60616203fe9344be780fa34197c0283. 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/QMFME2564164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df5b7b958280a6d54a92a1946203e69ab3ff26c07f459f945ac456423c55f29. 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/QMFME2564165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae00c8ecbbbbc2d3a008dfc04e1ad0282e47595514f99d71399fb80ff6de367a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QMFME2564166.