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 0x9f9a53652c99f6d252e4757188451205c76f2d13ea9d22a2e75eb16d444225e0. 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/4f4c2b1a-239b-4843-9bf8-b66d9ae22e5d.json and https://artists.proofprofile.net/proofs/artist/4f4c2b1a-239b-4843-9bf8-b66d9ae22e5d.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 0xd3258f8dfcf7bf3b07e3207ba72f62d88582009d491ac66fead1e5e2a20f9914. 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/QZQAY2403738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5589068cb22764069efb2871b83fb51e307ee910971808810e0a7cb4eb030a4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZQAY2447067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e2572e9a4df0c593905aceaaeada6cc48a3abf387e44a6ff634516424d3883. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZSYP2446150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f6dd2c9d648a1cca24267ee284c6db4c2c411433d617559fbccec68a57585a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:28Z), 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/QZQAY2422515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12505dd5f2d485b107f8cca5570d953eb9c8c1bb9e26c869a34d4e99d76dbb98. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZSYP2414447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37683362e69d7aac4afff8009115ee37e2000eddf92c2ca849361b132b826d9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZQAY2498189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df532937b6dd5f903b19229f6ae8993382cc38872c9ba1859ae7cbebcea65e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZSYP2423366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb623ff78ff14ed342441893a86c14e408818101a5634c4060f8a132d12c954. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZS7J2421808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773ab480fdc4d12d6eab9bd871051e184cf3283abe823bd30d52a5555ae0b91e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTL92423215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6366c5a729b499c511ebac856b356ccbeaa17070449c688aa6c01913896b3a8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTL92449370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf796d61bdef36c9367790fe8796a517b499c64cb4f0a7fe8e3a65b79408725c. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZTL92413621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa6f5da037ca136d15d6965385d5e51a25876298aa31132b2080d815ceeec82. 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/QZTL92407559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf725a9659efa55f5cc92e44c7947c82b2c1f108844f393f1f24a633b4f2b6229. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTL92490478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cec8be370044da18c4585c4dfdde01227289d86ddaaa1ac09dc6c54f76daea. 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/QMFMF2388180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdec60de6912f723aca8cd33ea2cdb59155978b55e8292b4dfa88cb68521219. 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/NL8RL2500813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9242cb99cf294065453ecd4ffd3ee8cbee4876c92f1919cb1e49f9e58a1a3a31. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QM4TW2419369.
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