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 0xa9113a15df5bb63b93db6326e15e5084b05ee6b64dd8d2bd96ad2ee233d1d4a1. 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/6451fe26-fa00-40ba-ab49-86ad854b4e44.json and https://artists.proofprofile.net/proofs/artist/6451fe26-fa00-40ba-ab49-86ad854b4e44.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 0xc493f3f21639f7d5dadbe6f77193bcb622ce20ad6a2ee5e5e7cbcb695e312073. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR0O70859150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84bf1737b36dc56755756921fbe04b877d4a4b13af988fa9b2e0131946bfe0e. 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/FR0O70859154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894ee220d6bacd1589a7bae0897cbfc980d65bfff0410753f5e0b4b799a2cc3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR0O70859156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b3a40dde61e54b08322c1d08d2ba0a7f57ad724323c7012c7ddb541481f39a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:10:07Z), 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/FR43D1300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fec616974064a29f1214e0865775831593e130609a772b2bdd1a3fc2c0705d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:02Z), 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/FR43D1504980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9765cf294e92c280209e40a1f707cbd2d4794e94e48c41791b918736833df510. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FR43D1700545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8574d6dc3a7e36f234a1c04bfb42d8d995be10543c4a2ff0167b7081bdefd9fa. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:02Z), 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/NLU7E1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b5bbc856b5859b47aa8712c0572d44cbb4a4bda65eb54e5b8ccf3adff196ab. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:56:38Z), 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/FR43D2000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd7c66c2dca340e50d240572429f9b7b3eb21b1d449f318e9475aa2a8f5c991. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRX452515967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b31a0c3a13f4e9fb3488da78298b457532bf1b644d9e473173b94a033952df. 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/FRX452516299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80f4ad747261905a7d2006d6fecd84dbec77f1c12d11ba910d0ecf0b06faea6. 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/EGA262302843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928952a5d01ab41fd57a60c605fdf12d7c546edb3a5bc9225a80d8e504925af. 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/EGA262305934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd783b1574ecc2635bc24ce791b894360360386d64017a7099198cb40c7f5c89a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX452550543.