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 0x06876f6ccc3a12d3f85137c9a2b583a4ce2939902339b2692b906222b4357f9b. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51608b65-573e-443c-812e-b91ae3798d2f.json and https://artists.proofprofile.net/proofs/artist/51608b65-573e-443c-812e-b91ae3798d2f.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 0xeccd4e24b445a1f1f49ea4aaefc1be22342153b4b1449b542248be8e254befc2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:49:26Z), 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/QMFMF1452092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e5152e6ad1c2c01fdc7aebd6214160671582a4b9f40df2999a3a396d9806f. 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/QMFMF1444734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3536cf299d3e3556e7afc7424f002afaf093c0efee47e3e805f55b4ba1dcebd. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:07Z), 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/QMFMF1444735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8bd4ffb70a067ddba56d1a1b3a4406cde9a5af298a8094f693fd5ce05ca525. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:54:26Z), 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/QMFMF1444736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f3381391e0f18f9b8574f44e3b955ab99ccd6d84936d5086abd620a681180d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:52:48Z), 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/QMFMF1444737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a9e3bfb7a8b9ede189aca35c97f166686364964ee820a6a6bb80e0532d1cf1. 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/QMFMF1444739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fa0c43043acc0e41ff75575283d796a1a2341ddf8bb29224ba1dc93f7814b7. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USA561463914.