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 0xa57dfccf8ef96e994ab5d73bb03a68fdd5536954c021a49db504855e0c07c674. 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/e8de1401-f563-470f-af25-2731d5d94457.json and https://artists.proofprofile.net/proofs/artist/e8de1401-f563-470f-af25-2731d5d94457.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 0xe1a3b02c993021c7798e3d52f7076af144a0f42c3262c0ac42880a2ba1a55d49. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZES52240682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb176f7710736402d905f004c832333c1dee95d8e87b2b79714b4089066f4bb. 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/QZMER2265535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d164ce27a689c0e57f36a4f1c5b51dce4bcd21dfab39663fc6a2ac3c06f289e. 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/QZHZD2272989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c655c30e1012882137176c1322b9f1ecd5acf45144247ea97d3d08c2b0012. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB72280847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c655c30e1012882137176c1322b9f1ecd5acf45144247ea97d3d08c2b0012. 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/QZTB72280847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd2c3c7ad8773b3242764c29f41e5ca0c1ba12c48075d4351563a0d69a78bf3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYY2350464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f3e1cec768ee22ea408cc48a0947db8f159c90c852d25bfd29508e5e6120c0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFYY2350466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d78553377b92738ddb08589b991b55e223e95a766c5158241367497b859b33. 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/QZFYY2350468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3559202218b3ba2542160064b02510d9db540b13748e4e91f669c0452ceb4e2d. 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/QZFYY2350470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e1f04f7daf2d9eaf919f1c5f8215e602af9474e755838524b18bd7a8476dd2. 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/QZFYY2350471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfca5252f5f4a7fb66d1bea29eb368b67529a0907e71ce60355056089812cbf6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZVEM2352233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076e01f3d51f04adee5549c4008d26af81ec689218c50e55596fceb683550fce. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZVEM2364450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5a3ba138ad614f9d1830779f1f44aa9a0fc9414ae2287e7bf03ab05863377c. 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/QZVEM2364451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b9818a98501aaf77881d3c4909563540ff23ca7a6863456afe4e297768710d. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZPEW2413933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464fd8493b2d46b50a16f8d05faa4e84a87223c84d211955329eaa36836e2d29. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNWT2498698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc3a090a834de59e2e6592b425562682565d04a7f0474fc2e00c2299ad16f6c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJG52558303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199f8c3f75107f8740885590981eb669841df3748a15522809e4008cdadeb7ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNMW2492171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1523ce616ada353bc5874e0ce04286b01e34ac0383ae5b4de13107002553f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJG52558304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6445b021ea70c9cfa7762b42f7698e08776bc1f71512ec6c1b9526503f18726. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJG52558305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3840618b44b3c91c6fee27889ddd32e3d3baf4120d54c11000923ba41785473. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJG52558306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646ec104a7f324640c4862313283ec05c52b3b9b0b44c2c80573422320a814a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZJG52558307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5077f78b4b786a9d1f37129ff3dbea448acc3107e2ef7a022ec84706caf988. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJG52558308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e02568d8072cfd811dcb1a6e9aa10403504fa1f25f13ec02cfa4138c701a98c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZJG52558309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2c8f081f9a0eb76d1dfd7c403e2b93a697f10aac19c8b6326ec3b10bbbcf31. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNMZ2449823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e4ac5b39d99bb57b04946ace34bdcb46887169451268512ae3e444480d11fd. 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/QZJG52558310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662693bfaddef492e8c9299c15177caf17bab0d6f2ac81a5fecd400722065ce3. 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/QZK6M2231939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8506431300cd605e0e69099dd8406c4f2a098b5e17b684ce179444b511d69a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPLS2303141.