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 0xb770746b59cf1716a45e2fd3c779ca730218cbd58d3f27f312a097eca1f9451a. 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/f3dd55aa-d54b-4dc7-a619-bd44b9146138.json and https://artists.proofprofile.net/proofs/artist/f3dd55aa-d54b-4dc7-a619-bd44b9146138.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 0xa8fbcdd59a9a8c7b1db97d0438c9671e71a68dd3d867aad1040cde7a5ddd05d1. 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/QZZ792405575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293058a8c4447432c220b6664af4dd3cf9d19e0493d7c5dd47e98718dac01d1c. 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/QZZ792403907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df2e9ef1f68f65c0ec795421d574003e4237699686acbe08d7c8998ea20767. 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/QZZ792403898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc152c40e7701a74e7217dbe74a7ef53572605318200ade694c6ea05055c28b0c. 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/SE6SA2473545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6fdf9af890ebb03dda223a4b9bd43fe93c74d5208051f0a313f0eaf9a19afd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SE6XW2415122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c58c5160c73f118322f1f8e4a825a25442ca77e9a9420126acb0b165555479. 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/SE6XW2419593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6672d35be393890ab0fa7f0f2a3705965d228051a714ac4de3d8faacdc91413a. 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/SE6XW2419195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce106671efb34bf288f0bc895429e12bc8ebd8bc9e276af312c9b7579c19c52. 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/SE5BU2530571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf42a758a1c3d1e00cee3953e0b8657e9061d75ba4739a7acba9d386b36033f8. 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/QT4K32513976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ceb24ce65cabd4006df84ee345f59c7b9a77bafd0513ac05d476622f6fccf4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QT4K32513977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa51f48d82cc9f1f0f460dae1136a2560d2986ebcb378abcee339ad9f7baa1cb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QT4K32513978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e85d02138664b8751e6ca6a7c6fbb92fd9ebb2bc973090eddf0da8335ba72. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QT4K32513979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3759ac57ed7bd0cbe45b79f5b7a9c04d60f0cf50370af8dfb8fa40e0eab9638. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QT4K32513981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec69763c530f5b2cfd7bea586bcb36c7d90e5f58cedabed3eb2feb2ffeeb92a3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QT4K32513982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ef69d0b96ebd1b0d37f3e8f2704433193db8e26a2396323518730240703fa9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QT4K32513984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9ef48a42d26b44dab5301e2a8349cc1c64714defa2ac9d0e2e5f36e06e62f5. 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/QT4K32513985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b2221f6d4be3fc14baa6a9062bb64857d4d5bb098b33e7f6c953830a9ea11c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QT4K32513987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5ebb7fe573280f1796a02caa17892c5b558417486fe4ba03344981412cf8d3. 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/QT4K32513988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5686b2c7a5975b53cce0501391a0df350e8728de4e636a5796a9c14d84343819. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QT4K32513989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe603a7c504f283482b16315bda6c4609f61bf7a8a4d183eee9625a3d3fd92eda. 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/QT4K32513990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f036e1e194fb9cf9a16f913f6b582c1423e2e470d14c46355b977fed14a428. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QT4K32513991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931144b4b5361258d04eb5ab6c61561f280e2b09b0451f32c0e7a06240bd9454. 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/QT4K32513992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb507d51afebb4de9e139051f64d946946a395a5fc5568b702a4bb3e322414fd1. 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/SE6SA2472410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297ca2409dcda6bed100ffda45958874e3fa0dbe6f0cd4ebff9ed14643b1bd2. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QT4K52593217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40905b7548a0e8db8c3b9eab51d4555a9d4e1422dbad2826d4f3bbf69dcd2680. 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/QZTBF2427291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40905b7548a0e8db8c3b9eab51d4555a9d4e1422dbad2826d4f3bbf69dcd2680. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTBF2427291.