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 0x18ded06106eeab4f1c58ff2f7eeb7b49115e39721d0f2937102db632980fd3b9. 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/a10e178d-a226-47bd-893d-801f3945c297.json and https://artists.proofprofile.net/proofs/artist/a10e178d-a226-47bd-893d-801f3945c297.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 0xd5919ae4ee92fbf3dbb1a5d6945169aa2a80748c7dd4ae70301039e4d17c37f9. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FR10S2093389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7b284109b7b32436e1b3856a11e47aca7c275986cd33919065649e18f2fdbb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FR10S2093390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc409a8ead311626a6934353fc30c69654bc1d5fbfe3241bec59453fe8c5045cb. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR10S2093393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3aba6f3144f07690397cd179a0ae258ebcaa8b490a19662636a7c083f89f15. 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/FR10S2093394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3939893e96a0dc1cf8214edad3056b13d508e9f74fa1601ce919d15d72f3d837. 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/FR10S2093396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98faa4bece82f625c40ed17bfabe81c3680f1beada88db672bfd8f201e84f80b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR10S2093398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6fc4c5adb533c4927549b074047b7a818979a9f9a6fdbe8f84a844fb5f9632. 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/FR10S2093399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfdb1f7685864b2daba427b4162003c163b453ed4966b92dc13d7ddcf470c1f. 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/MXF011700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8a5447e6b82a49179d338fa48bb5b3d21e1db15d895eebe825f57f899ee8f5. 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/MXF011700375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4ce5b6e18137d0e95e9d5f543adc89aab44de979694de69249fae35836f35. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/MXF011700376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8c1a20e721da522d74696915a6d14db45f281aec7321ff3f62976f3ea82ec. 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/FR59R1972704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d37f7f01c6f141e8eed6cffb68f9e2f33eb92c137eb8571900b3c05be83bd17. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR96X1933313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50a539e37f3e12053ef25c446c6342afa389bed37faf8a80b68e97abf6997a7. 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/FRX201907879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42611aa03f58521c5cb70da8ddd944166364e4f8e4287252df4cb53fa30cf64b. 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/FR96X1985781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8c1a20e721da522d74696915a6d14db45f281aec7321ff3f62976f3ea82ec. 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/FR59R1972704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9870916c7d547bc2135b59c11c224b073906a8f2e32157afed5125c43d894aab. 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/FR96X1968226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d37f7f01c6f141e8eed6cffb68f9e2f33eb92c137eb8571900b3c05be83bd17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X1933313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de979361616dd9bce4122390ec9c7735b7484cf09acde72b8e9d5c185ebce21. 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/FRX201907880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7250a5b4e3f1a503d4114c34689f2a0db2563e77deff082d617a3ed0750b9816. 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/FRX201900414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb26b29d28f4220f115c864b32127e3b8b369d02a367629c5f7e1540e3b82d. 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/FRX201907881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb325aa89d71aafe2326323d30ae0f5eb5598a79c85b0b2622ccfaeba2cb3b792. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR2X42179674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641fb9bd06f80294e664f85aaa5d8bfb97e98ce3b7a2a530a289caf62b559083. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/FRX202122641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbbdcc60d974f94e9a625ae186665c3df4ee12f4b529145ec32b8d3977032ac. 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/QMANG2233864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad05a4f8c2fa25091a33eb3fe6ea1de104d2d598eedf35c08129b34dd4f330. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2310716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba3f884d2c336b845fb05534cc9edd840ebefbab7ae47eee3447f72c832e83b. 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/QZNJY2164484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390ba1ce8d543b1455e31b61a5326818f745bea2635493475180472e161034de. 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/QT3EX2422093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d95c715350ee89ebc6af288f67a05c82f36c57f7e3216bf2830f2b54a5e1eb. 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/QT3EX2422094.