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 0x7c284eb8bd74a84a125c92ce84d8d744e4a4cf1dff633d5498ab9ae6fd6c6aa9. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9df4a22-ce98-4e33-8b40-c61462d8b555.json and https://artists.proofprofile.net/proofs/artist/c9df4a22-ce98-4e33-8b40-c61462d8b555.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 0x6ad8c61e82b2269c409c498ab00f38646495bb1a207712bb96b0489470f2e67a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3LS2100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2fba52150133ad8eb276831cb8e4d274054c1f9fd1a604ccc94b2bf984684c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3LS2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d3f4bb71f280ab4e4fbffc0bd06b504abf9f05a8e3f1ee141971fe4127bbf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:09:46Z), 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/QM3LS2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa192f141021725e5f2dd13441e05ffb1e9c86184e247e19448d4927f2dd76831. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3LS2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52430f8ef4422f6258b99227a2e5a8de89dfaeb1a37c91f0744e1a8c5abef53. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM3LS2100079.
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 0xe3571f7524dd5d229ea9215846a88dc4de52b08adea54316e04f373893dba3f9. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QM3LS2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80406ed075d65995ad3fbd84a59766b164626695268451bb4368a1faa32e70c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM3LS2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc880652899b39bd3096d97218e4b299578ef624a453b3e1997ab8671f5e6d175. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM3LS2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6563b6b2b9272b7ccd19f033be95de60ecbe38670d5bb858a0cfe44bb4df9f2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3LS1800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072da22c4381286e877882c5f9940b1a3c0ff0e9ef89a63b7e4d17fa01768397. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3LS1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3d6e37832a9501d4c248e91eeafbcd67ed035d0a2ac418f34acc27f75d585. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3LS1800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7840f800e2f482784a251488b54cc95a8ff512064ac476c07138e283d0e9184. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:56:49Z), 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/QM3LS1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5062bdc32f98dd5345a5283d9b5abe8f601932c88f7796bb043ebace3be3b940. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM3LS1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b0c8804cb4d902150c5818f2ae59b4e651e8f354f2f2b32672c32afe0de55. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM3LS1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461deb8c7624643ee542959884ea1650f024d9c9a499ae150cc2ffa1793390d9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM3LS1800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19023e566396c9026c5e5a42e2550ce80a4c2a57e49b3db19ba2c1dc3d8c11a6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM3LS1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7ed6519d685e9017ba0e7a153fb9b4c956d1a96cdb70cc414bdc4ae9ae7bb8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM3LS1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e39cfcc1671e2745764fa90d0d815946047783fdc211d9ede644219551b5fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1611168.