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 0x9e7364dadc15d0461d972b6349adb5d03e9e2c2ac08f38a5c9ded3a5c19cb63c. 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/5b0aca31-0c8d-4769-a46e-c2de0e23d4d9.json and https://artists.proofprofile.net/proofs/artist/5b0aca31-0c8d-4769-a46e-c2de0e23d4d9.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 0x3d0153d47e8bc35242c5a5a5ff11dc49583e83b8326bb6f9972d025cbb508d9a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMBZ91631471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63199780062b9891b219fb92f83804819b5ba574b48ec3cd53e7ac1a1d51225. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMBZ91631470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798de84c5d266e6abf4ae08d1dd39f32b4da8202e707a49d2881a128bcbd6793. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMBZ91631472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884d8776ad39042d178043bc32c3dfa2cf4d70bb7627d76892cfb18e1f2dd635. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMBZ91631473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e366276928bad300aed28aa2d37a76b89c68850a708c0f481b77dd6b980cc1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QMBZ91631475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b588b8f600324bc2fc6f0fe19e0462706c9ffc9b3c004d4a0d4a00b9de2fe56. 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/QMBZ91631476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e56d77c16eb62a35072e8aec83e5aadd76a5e28eb820a3a04da7b04d6ac0c03. 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/QMBZ91631469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63199780062b9891b219fb92f83804819b5ba574b48ec3cd53e7ac1a1d51225. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QMBZ91631470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798de84c5d266e6abf4ae08d1dd39f32b4da8202e707a49d2881a128bcbd6793. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QMBZ91631472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a9529ac1fc40cd55916171ccf659465520fa2140693d79aef26b47fda46edf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QMBZ91631462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2176b1e4bf0373a8a71d5292707ca625b7753b6be2376ce146079b526076cf. 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/QMBZ91631465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a045210ff6c0f59dd03f5bab5caf278de808065c82b82e5613f49364bd46a. 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/QMBZ91631458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16ada20f7974ba2bd846a85a38df5d26bc91e324a3dea455464580c649ac81c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMFMF1582778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd9efb719f63f5d5c3a49eb50069995e1236662773fbb72b95bbb5b5a73c6aa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMFMF1582781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9aaaf66170adf5b4b629c6b3ee38adde633919e92f845449727b50fe008aee. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMFMF1582786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bfd946cba40eaf8bfc536a01f8f8def46eb0900ae8bb3902c30460096acf73. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFMF1582776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16ada20f7974ba2bd846a85a38df5d26bc91e324a3dea455464580c649ac81c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QMFMF1582778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd9efb719f63f5d5c3a49eb50069995e1236662773fbb72b95bbb5b5a73c6aa. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMFMF1582781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f99ef0dea8cb984f85d8dc41cf707876b7928277b73922f78caa5a596e453c6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMFMF1582782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9aaaf66170adf5b4b629c6b3ee38adde633919e92f845449727b50fe008aee. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QMFMF1582786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1531bffdbca604f1ffe244e1434050dbbe028f898a105d21b6435692083119b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/RUA741806001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1328a3a2b1a0851331077a0f9fca6d2571963cfb26e8265db36d35ba567d4d01. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/RUA742408201.