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 0x7d322aa10ca512aef69c28a5035c3ea419379f37be73f9571233b0fc9140f83a. 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/2e6e8ed6-cd45-4549-abc2-fdc2e720b060.json and https://artists.proofprofile.net/proofs/artist/2e6e8ed6-cd45-4549-abc2-fdc2e720b060.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 0xcbc1192082658138bebd4295b8abf5c693776ef6cf956d37c9128dc3ff33cad8. 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/USHM82464785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3677daa251c9adb740c81d7bf1ec2b60766c779be9c236fcfa0f6704b355e9a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USHM82387432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890565acaed87d225c2920a87aaffaa4985cdba0ba5f3f8fc516c4012ac243c6. 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/USHM82387434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46afc130dc9f042612cde9ed561f1c1e6f4316ba98ef372a23135a4ff2ebf902. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USHM82387436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe531b04e644d8a9412b5c8169d6b876bf221b2066edaaf9c356f924a89e232. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2495871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ae58fe6a63214f62976de5316c782421e7249b4a6cea9ef10811fa82a5e098. 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/QM3DF2400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bee35b8b7cfba7e3eace68fbb08bfad2f7f25f51c8930d0cd6b54b18a0bcd3. 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/QM3DF2400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda62ca6225e5471ce9e98bc6f94b390ea0e1e13a76aebe5c3db8e33e9e97db8b. 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/QT3F32480263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90f41a242b7e5254b12c30a1bdd004120e59ccf1326380d8c64ba407dc86985. 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/QZFYZ2509738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc429460d7d13ec1050cea65a31bd0ec6855131707ae01a59b5ae59bd242f89. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QT3F22434869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70acaff9f4183913408fc6a0a3375482e8271f8c88c740c92c4c743773b60824. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM3DF2409300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ccf26ebb85942bef470d5457886ffbd853d201daaa02c30270709bf105d9dc. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM3DF2406505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d2e62495c2da06b28edef3b1a18639bbe02fb4bcd518a6bd9b6df45fabd152. 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/USANG2493393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2db92dd53ec43ba1f0e322eeab2271aa8c59472a40334d4770ac530d26f2f3. 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/USANG2444533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6107d8060aeaeb4ef96f117b3ccb894d92d778fb1c81929664b3bc7d5fc9952. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM3DF2401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef0276c1ed27cdfac07b39078636ed0db5c89c688dbe1820cb2315d65055220. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2469319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf21531554a95db9287cb9198a1552e72517ec5e4fd9ad316e02ac2ff27108. 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/USANG2477638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9de1aa2bec11cc21cf401442dcff98b87bd847d83b512b8dc2b5e667d800889. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWFT2410740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd662e4afbb5d7f2a50f976120c1980609737f7fa9bc1dd3fb40d3882e51e86. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USANG2418837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae807c7293233fddfa00ba45d8d9b49e2eba4a60a3b588dc792ed2a585eb7750. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZWFH2461238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f2c1e5982c5bb139692c18274942915a97ad2237ac68c7d50e6b3bddc7e72f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2464828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e76515b1aef1a58ec05671ca8421ef2a65893b1e26941c4f2762018e732be95. 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/QZTBE2446591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd8fbcc2a962a084dd89667456f8de597e19df7e1e1cf886e28cbf9c6d74d4e. 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/USHM92483237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd544b989eb421b545a4f016b864256dafa16708e3e636e6f0ec077d904e727. 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/USHM92437878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca233809819beea6aeaf167541bf8cbfe8c5719cc36cdd71565920444b5ce0a. 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/USHM82486388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ccafab2f277470141a064755fa24941fd61772d5269f468ce5c5c924ddf975. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM22408225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71feced0dcf064f604519f957d514687c4d1061bc9055c2dc39013da7909e0b4. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/US3DF2422257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43520a6def685bb5dcb16ad4e53d8351909766274c72250f82b041914861f578. 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/USCGJ2402456.