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 0x417d27784f9d949bd89b492733cd1fd958b5c2429785b66cb817ce23183090b9. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76488710-4e17-45f5-a1dd-b34868896aee.json and https://artists.proofprofile.net/proofs/artist/76488710-4e17-45f5-a1dd-b34868896aee.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 0xd75c7b42613660162dd377e4621d3b6c989717fa59c487a0299858f5c1013303. 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/AR15Y2000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48800b8fe10f080c580ae0d89f7a0b17471445f7de7effea2f28d7d676a3473. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:35:04Z), 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/ARVW52001075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6215cdfdf19712e8a124127d16fee8a770de169c66334d2423664e36e7d90465. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARVW52001076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6fbcaedbc94eec53a7f1b6bb2e1cbd89ad5bd6d99db3e0b86bdcf13639c7c4. 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/AR15Y2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac84ad0fe5ad2cfe1b912a04134c3edf9d1ace6955bcf20fb9fb53f479beadd. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/AR15Y2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191547c22f2253fc49782aade8774cc325d34a924a4cedb594dc26e959ccf330. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:32:34Z), 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/AR15Y2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62421c3e7c361cc4b3c96c05f33aa070e31daff8e2a7913893d2c9cdd898ecd0. 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/AR15Y2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b3bef2b75715bad46152487a038bca0ac70feaf2c6fcd2b9d7793e578b44a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMZ92523989.