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 0x38b765495344a6143e4080be8be30cdb664106231e1e9938255311b27076344c. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b387b184-79ab-442d-8d11-b644f30b0a38.json and https://artists.proofprofile.net/proofs/artist/b387b184-79ab-442d-8d11-b644f30b0a38.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 0x217ea71e2c11d0a364f5b73a0164c72b0d0f0332bc20aaf1a2ebf7bc6f1873fc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPTE08475230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa741832d50df7046ce3f6db5f178a31a5d4c24d8966b7860e4c0660ab339dc14. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/JPTE08577500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59951fafad1d462eba0675c89fcfebadbf56f6defdcea6148a634e83faf34f41. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/JPTE08578500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e2a6ad6761c46f7a078933a7689f676d855f7ba58af2c7e44229bfc2c464e2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPTE08680370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fd29ac3c21a049e952d0f60e12b392bfb911f08c0f6a44527d1215d7a62d7a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:45Z), 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/JPTE08681300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd495c4807806fdfbf93bb01616f055b6e8f54017e24e4ad74087cf59a2fee55. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPTE08783330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1792b9ff11c977e3de9ab7fadad2d852611f63a59703af7de2299328528763d5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:57:07Z), 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/JPTE08785230.