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 0x343cade9a954188f0aa9e1b18d755dd3527836125d481ebf0e24dea8ec8af531. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed67397c-6837-4942-9d13-6d130684b8fd.json and https://artists.proofprofile.net/proofs/artist/ed67397c-6837-4942-9d13-6d130684b8fd.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 0xe69dbb18ab1a15ae4a411af04d1259a54d83caa197ff4799f6b2b96c4c5e66ba. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:24:41Z), 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/FR2X41643912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576c844469cd1d1ec19aed38dd84037c031c543624d20ea983c149f90e2ffc09. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR2X41643913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73144a51a8811e906741c4dacbfb0b8a3425e7a803cd19d343e29c93140d20e2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR2X41643914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7177a92ef7aff1e5a3a5579e4c676e8fbe256d0b5fa1bc70cc940c092516a914. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:40:58Z), 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/FR2X41643916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4f8a0fae61e545cfd2df3a9d3418b9b00600f6f5a6b733e0ab4862fc6d67d0. 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/FR2X41643918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122464192882838b4c8fe720465b886f2af8b2ac4d316618961799c39cea1f2e. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:51:52Z), 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/FR2X41643923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4915a4ae7ad3c45bd00851ff6905f1dfc275ff133fd29ba444067b1826adf71. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:00Z), 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/FR2X41643926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9196dfc1201975baa4e257b0405d04d6e4fdd46f8e5f047d93eea2455d3694fa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:15Z), 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/FR2X41668427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12860077fcc41a8497a390089d9b8934e233a64bbcef77eb5422363f67ef9608. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR2X41668433.