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 0x215bc14111b802b7dc114b64b9059f9fdd730865026aae3400b39146e9ea192a. 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/c1ab6794-c64e-4779-a855-db249022c069.json and https://artists.proofprofile.net/proofs/artist/c1ab6794-c64e-4779-a855-db249022c069.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 0x56d4f9d2c2720d8d815ca6975f261df5071e9dba0220f2a10332df12e32f3b4c. 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/QZNMZ2363846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbbf8c9db5c9f870543c46fb793eac62c31428088d3ee9ced9f5e8706196f76. 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/QZNMX2391862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9501dc29baf684cd7c707454a967a1c4cb4ff219232a74a8363f5919a66ba06e. 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/QZNMW2353799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65e77bbb91e48af85a1a4cbdba966c693fb2c6d753a6b8c19c4057e39710dd. 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/QZNMV2339103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01412c363d82f4c28bef1b57b142bb9f0200d33c5ac19f81591d580d4b67681f. 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/QZNMV2324771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b37b0c5a241ee9c7c1521e918343b819d8be3169bbdd69cfe512e2ec997b755. 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/QZNMV2323196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e08f40512e4ebcbcfde7a4109209ff6a8ec002c7732100a5e3338ec3f06ce7. 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/QZNMU2360606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6dce833e69715d6c1db763d69496a9d10683cab5cf4e8e4869e9f492131385. 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/QZNMT2336320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35364e58a7b392bdf8f9a9083681b1247e992441b361069e36959e3d44d7dfe8. 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/QZMWW2386419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509a49ec054db2d8dfe3c61c793dbda1a7da2b59e99f46429b4eac1041b6270. 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/QZMWW2382339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50fc53fea86b555f0ae7ddd3ee7f76f96c0685ca839a3f629352dacb1023088. 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/QZMWW2384533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6da52c906951bfc33b58f498aa9b0669bfa8274a14fe02c5f070c04b90d719. 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/GX3Q92207285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0edf83a376281ba112c5d7ac2c125f6a75069605d0ddc9465a49e197053108. 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/GX3Q92315639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6740837f75a7c7cdde574b90b1eaa6bb9fa70c103d04d1cf6510dae661de9f. 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/GX3Q92206688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800c7508f442ac96331dd2a285e498c3e4d66887cfe46f3417132b368624c97. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GX3Q92205685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025a79adb87117938823fa60f29c508b2bdcf43aa07e8438b0c99fdd19fd8341. 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/UKXN22250678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077ed827fdfbfbefd39adb2071ccdf340c5c527c6264be9ef1e4bfaa56c4b36. 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/UKXN22248931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9036b19871cf3dabc760d4084e9d22ed81b7c3863f00c0da08d91e9ded0368. 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/UKXN22248146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6840312ba28bd76bd1fd35daa6217d86d1e63e700bd5d257e2d467937ba67dd. 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/GBLFP2225466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559d7365393183dbb2352d8cb296f0d8ff527a850e8536a133c073e5701a876d. 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/QZTPX2156547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b91c1c4a9f08e829b05152f360ee83e858fdedd7076f46b5ea5fdf4eb5f1a64. 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/GBSMU9007433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa0937c283c904c0745e029f11d3ec54ade4c9e5122b1936d21e019492290c. 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/QZNMT2331362.