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 0xd2d8699f2c01178e32bc626d4fdcda4a9d73dc1758ed73f94b5dc2d252b99dec. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c10d627-d8f4-4e62-be23-4465ba3f03f5.json and https://artists.proofprofile.net/proofs/artist/0c10d627-d8f4-4e62-be23-4465ba3f03f5.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 0x8417dab82ce15c42eb23cde78f2a9d91a29b3cbb951aa57a1dfbe46db4648277. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:33Z), 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/PL36D2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ce0006ebd16a5e89109b6cb3589771ad1b9f4d0641d4da5e98d53319a1625b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/PL36D2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8eb757cd7d68db31003ab0debc4bf585267d0f51785dca26189faa5bd6c217. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PL36D2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50dc4fbcae4d51e6058f17c1b399ad0b819aa3b7462fe922e0b6cea944dffd6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/PL36D2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaf4718a01295f79a271edce8d67778869dd3e474845f89ec0df587847e1e46. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/PL36D2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457f1040c8338551b170d9a28cc1cc80950831ca3f9a2d51c385e44cc540e5cf. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:14Z), 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/PL36D2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78be5359792e62e37a066bd792ea2631dbe7237e5628c0337dbc8ef1c9510f1e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PL36D2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7375b3107338c5e4787b255d97198c1f4c2ab6cf030beadfcebb213cc01a7d6f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PL36D2000008.