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 0xa134ed37c59ff097922652accbaeaa481c5ed1932461ca933fecafad3e6f9efd. 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/df6d8a1d-39b6-4a6a-9fdd-cdac3174fbdc.json and https://artists.proofprofile.net/proofs/artist/df6d8a1d-39b6-4a6a-9fdd-cdac3174fbdc.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 0x50e4737ac18a437de6ecbe1355d8c223a091da006ec9f8ecbb99be548261c735. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:42Z), 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/QZDQH2420493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e66668418d4c5890554892b4297ab90c257b721fda30f1f7b995e7c25912429. 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/QZDQH2420495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a8c0a12a181bda9aba39b925218eb2dcb461f6f6a93bb6c9263e7030ff52a7. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDQH2420504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd75d9093b86c9ebd635439507cd3e4a2cc3c07512dc0e87d5d4f1ec9d97bb2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:37Z), 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/QZDQH2505041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9365e156c079d29b0fe0d52bf30e27fbc36af1f8b0dea1a9431d7d9a94883e37. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:35:49Z), 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/QZDQH2505045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ca739cf2acddc3e7a47b58a58942a399cbc4e3c68994f1267ab6993377435f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDQH2526327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c6d06f0c08ae132b779207b68ce237672974f51d8d16ef56e3bf980d75f80. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDQH2526330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae06509e68f91943298eb6e0625c3c78f3df1f4f190f94dfb1bde450295fd275. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:34Z), 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/QZDQH2526331.