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 0x24dec60a63676588cc637d084b09f940552535ef3cde75c8fd2237e0547873a7. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a45855d-c0b9-49da-bfe0-f327cf8f6223.json and https://artists.proofprofile.net/proofs/artist/7a45855d-c0b9-49da-bfe0-f327cf8f6223.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 0x05fea6dba3af3e7156819a74c427c4b710cffdfb7fa0b7e31f8d1d8b70c1a9ea. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/DEAF42300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996f2d5f01767d41db3f85cda0e7a289e6ded31e391321d6361f8b037c7f0f49. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEAF42300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4408d45aafdeee192c4cfefe9fc19e2b7b29d802bb197083ebc402a585616199. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/DEAF42300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faa3ed50014dd843a096d88052aa40128f4539f55250387529fa92239a2420d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEAF42300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6984f3adf20a7fdccc6f2dd323bf83db795f5aa83e234dff8fb222dde9d3ff. 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/DEAF42300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a8e11e688ae82a843533dcf54b0b6121307b12bafea52a241547fb9ebe9c0b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:30Z), 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/DEAF42300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66e2db6c9d47875fd8ef51fc8fc41bf40c98ce1df8a43690feaad548315336e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:29:49Z), 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/DEAF42300105.