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 0x3c9d5a7ea98ce2ca2f9985530daac45780af88fbf4bf943668e57308ba2ba44e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e26f10f0-242b-4226-8798-2700fb1403a6.json and https://artists.proofprofile.net/proofs/artist/e26f10f0-242b-4226-8798-2700fb1403a6.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 0x528056965893defc81be15c5fbd69d9b5788f049fb9bb90bf2c188af9051f5cd. 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/QZWFL2302030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeb9d24abf179776c318b5d4b67e75f7d7b510fb1e9dd72623e668f367cc4f2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAZ2327593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb808325dc954c98f90a8e34079a68c66c0cf501c06591b132b5d96b34ccaa4. 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/SE6QE2350692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322250351e293321ad5f1f80bf0c532ede4e581d644a616c0afc099b4bca0f04. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5BU2306643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955adcff4b762f8bca580c82c0e8d8d6d484427419c9af9845082801eb3f9b2. 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/QZFZ62366069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cab816df79dac44ca07969b5f6f91cfbfbd3fe4402a75c992476a87400f651b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XW2249130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c97cb43adfc69f4fcd2410cc496caf959377611fed0a853862eb9267b303353. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:57:13Z), 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/SE6SA2250157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72872c042e3f5b28434291a28255c7cf7091b48d9ae55d2711aee85ed92a2ea0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:54:29Z), 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/QZHNC2253517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046a8478df5e12b75d32c2e11ce0d41b6ea885b873daac790ae76b8c1a7ff217. 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/QZHN82258537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1c3be8a30d8adf50e44339c31b7d5c5438f0ca269977fc3a35b47fafa21b72. 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/QZHN42292428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3d72edac4514e020a60080d676ec7da4e6cd2828a72a0bc73fef8ccd189e47. 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/SE5752284426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1f60a5a846b40d6a06497ee4d317fdaa1547d58a88bde20fa9c556c96d5d00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS672147709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1c0e4b0eeb2e8f12471932f38ef873ead98ad439b21e1919a9a649d0f6581. 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/QZK6F2154368.