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 0x554cf122fe6c2913ecfa0f0d97570f8cc8cbf7063c4c0d3a5cbe970c26537a4d. 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/12510ac6-dd48-44ce-aaf3-2b24301c5061.json and https://artists.proofprofile.net/proofs/artist/12510ac6-dd48-44ce-aaf3-2b24301c5061.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 0x319022d196c2b40fac3a2e41520850d39fa479c1540a6992c566cb45aa3ed6c0. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCAFU2123388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be634a7ace6ee3facc36cd418c2e195f914fc8682ff64e3b71ac4d1ec86af0. 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/TCAFU2123393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a64759fd6d67ed705b43eb3808b8d24a1510030343b136bad2c34948c3f3976. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCAFU2123424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf942c9ad7199d3c42b1dc8d449b5d1095a23dad4d0ef47693857b86209be7a1f. 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/TCAFU2123426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5718037c2a9a190c1e7d9fa24114538f0f54085cf701a3c14259178c60e6e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCAFU2123428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d0868ce0969c387b1c465aaf329cb69bc066fa561057259826b4eb54e1def9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAFU2123434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8645c0419b27b45aeb88ec85e91943c156139a6a80a42b24a7850a7e343377f7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR0Z50034003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0214e0de8dd28d3d381811f523f82daae17009fc12d1f958f223436417bf3f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAEB1980059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6738d1019b9b929645f5455dd38d926797ce0af48c0ed28b13f0f38ed11583fc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:53Z), 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/TCAEB1980070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ad50a5bca3616c3d33af8a25283d15ccf4776fa4006d74a43994cb9659892f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAEB1980087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527e64fe82cf449230de2e98f822c91584633692803a1cad73c5458621355f28. 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/TCAEB1980098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c79fa3aca22125dd940fb53b2cfcd3dde5511bbbe0ae5576437d85ea42ffbea. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAEB1980112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c77753e3bbf39019f5380efb80dc2bca9fb4f8eecb0e3e95db2e09b21b999e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAEB1980139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ca21ee9da08af64a8e9b5f8f88828a2052abbc94d39003a9c36cf63ba3c84d. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:26:15Z), 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/CIUM72000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f87c312a37f04e86079310e30ff86d286f14294c5ca570d176f9aa2890c6a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SNA1G2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03ffd69c6d9702a895cb8bdc177916e0789e37c2b1bfb6da9968d3383a99368. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SNA1G2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f680461c1ba7f32bdf199340fe5077489577360f95785d0a63a0c126a86dbb0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGU2329474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab96d8e20ed13b5221a2a4d2ddce50fe51b18654e8cda9071b53bcdde0725fc. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAGU2329493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b4676cab7f90333367f906fa9a7686549933074ebb4f00156c4e2475f3b60. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:31Z), 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/QZW9M2352418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48e36ba0e31a2776309942f4b6a804c0c06b17c07c70f591aaf6329d773b483. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:29Z), 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/QZW9M2352419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa815e275b9b896c9ed9f6dfd7861443b8cddd017f2125d54efa843a3a95e80f6. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZW9M2352420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec3fd34a19d9bb2c39b36582c39d2d0b10bad7b6b0dc0d641bf1a1158333696. 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/QZW9M2352422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21e2f0ba5bd32a4aa288a562ae52e3f1c5fc033ffeb275513136a30a247a05c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZW9M2352423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2479b3e6512b4b26588d6385e3c0fd3bc52a5da77d596b9ec999b3c2341c3bb5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9M2352424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e452b9f51a2f8ad53bfa91122456837594c7b9947b7cf009418928b72610251. 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/QZW9M2352425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0df5dbf78b0267a2d45ca905d8eaf07de19792d4e5d295508a82f6b7dc3710. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:30:51Z), 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/QZW9M2352428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba07481cb4cb4fe2a40a01b9dc71201f04835a7db37c2a5f3cc92356671b926. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZW9M2352433.