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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54197c94c9184759373e35f46fa8bbfd10cf3acc95627bdb46aed2e79084863. 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/d3924171-e15d-4cc3-9091-85b625eb4149.json and https://artists.proofprofile.net/proofs/artist/d3924171-e15d-4cc3-9091-85b625eb4149.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f628f680ae241693a24c77e6e147e345da0e65cc5e4561f487b828586b7cfb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:42:38Z), 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/QZMER2164704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3144ec7260e6dd545772f2f919bf1b48eb78bef484daf15f0a7d901f620670. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHNA2291570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f68b4a3331427c819acb2555452998ef3e82115b445f2843fb6949f37bf4783. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6K2259083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfacf8459017e7410a4f3a61bc369bef76d51596b26a72b653cbef64e2a0307. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ42349182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fed986bb1f34539b79fce0212d78aa99edde1954c0360c4ec47566588ce1119. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA42364327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414067453ba522f7479ffd891c136cdcf24e77d19f19ef2d5d61ae0ae75ff1fc. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:25Z), 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/QZHN52360739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2222a72d213879ff78e282fc9cbb08960771e15ce693602accbd6aaf9a308829. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPLR2304610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b59beff25a7d1c2a503527acd6083744207f57fdb101451a38ea9dbe8259df. 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/QZTAU2389392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d4d3de69449cab01e0e890e1ee4f9c19628a5bd83bb6c75f7dfa09e1b54663. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:39:15Z), 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/QZTB62303814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccfc129d2c72527a02dcaab0b3094191ad7befeea4bf0841c663866c4093634. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ62473083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a0221f0252503162d543a0a55c1a8bf350ac3fd4e7dcb1af5ce10e6380d9e5. 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/QZDA62447540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1593ccbb3adb80c714e1a8064743ffb2ab6316ad903a287544afe91123998cee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWQ2415898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1ed39b3b1853f9463fb936e0309d5ef223f2efeebf9e771821ea2ba82f04b6. 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/QZVEM2538636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfdc2c3067726266d025698dbb6497c0d8ebe67767b4973733c4b51c7e2297a. 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/SE6TI2165021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141b74d67327cfa38c73d86e9fb42327ae2f3687871407b4d19d4b4ec9093d23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2298043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788a83e730c9f1803b1776345850016c5548a8dffb5c3b3f523a5a55a27987b8. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA2P2133076.
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