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 0xffbc37ff05396a231bf82da6bb857641fc5c85b026393acc2fa03d45d32a1cc6. 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/b3a22077-28c9-4e98-89aa-ab20d6053aee.json and https://artists.proofprofile.net/proofs/artist/b3a22077-28c9-4e98-89aa-ab20d6053aee.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 0x5a4390373a9c79a498ac88002b0d1864bb8c063455646a6dafb6d45665142423. 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/JPT251700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d2e4c70b9a8a0d71270af12b4a0e3c55690bc6e004f0da71e53aaab9869d1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:52:02Z), 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/JPT251700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970de0af2653041b28dae5a3c81a9940253bec1dfa3226ad5f60ba48dbf00d11. 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/JPZ922100373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185b90778d8e5cd9c086eb11603522aab8bf0a432010b2890a9f98823cca3d3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:11:06Z), 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/JPZ922100374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3270a2296adc0640e754efb5aa17044b77287c86d2f7e0f521105bdc95b01d0a. 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/JPZ922100375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3715f4a156b1531a20a104f1cacf3e406cff890386b49a68e9dfe2006275d62a. 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/JPZ922100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353efd31a3596982b9c7d7ec917fd4726235a9f4c60d92ea7d7d10d28c586c3d. 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/JPZ922100377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f342fb4488c71ef05fb14392dc4466c6335362c6d5ff1450ec8f61d23084d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:05Z), 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/JPZ922100378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b41fe81ddb9cf2c502cff9f423f73d4b0993195f9a1a42fadd04e658ce29228. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPZ922100379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67110f64239e2e62ff701ac16a21346aa1374eec62c60f285cb797b411727e2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:09Z), 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/JPZ922100381.