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 0x318b4af8047cf1825d7e6f0470564494626824a28be6c7b0a273b7f078eca195. 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/a297c0ec-2b80-4c92-b9f1-713aa0607b8c.json and https://artists.proofprofile.net/proofs/artist/a297c0ec-2b80-4c92-b9f1-713aa0607b8c.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 0xbaeb4c08f1ec611ae7c1ced7a74f504c318562c8cf4d062e3c9b60f8c52ecdcf. 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/DEUM72007001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafec3a30767cc20e06bc9fcc07b0398db173207270904357a8780fdb36383779. 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/DEUM72101048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb4c08f1ec611ae7c1ced7a74f504c318562c8cf4d062e3c9b60f8c52ecdcf. 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/DEUM72007001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafec3a30767cc20e06bc9fcc07b0398db173207270904357a8780fdb36383779. 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/DEUM72101048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39542dc2dfdca1e49eec9d03a435484ddfa65045a8a76517153f3e0025caf7c6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEUM72101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b69abcd5c010482b7afac3d08b5aff0a1adc9caea078b71ffa3c3d6e1967f. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEUM72101052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de39ef6e1ab3e53702cd9fa8feb741e64173a575ac0a56eb2d260470d921f28. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DELV42300682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2a313afb89506b880b94bf8d4f4ad5851e063e29be71e1a4451d56e9c7cf2. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:06Z), 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/DELV42300694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08b5d05d7c07210cb5acff4d217bcf507e6e3827e59fca626ab50d0870f6e2. 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/DELV42300562.