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 0xc8891bbc6bab1891ec92bbb751c218df5a4897ab3d07dc45e111d9d3f8325e24. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec3ed179-45d2-44c1-974b-9243a37f72a9.json and https://artists.proofprofile.net/proofs/artist/ec3ed179-45d2-44c1-974b-9243a37f72a9.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 0x2a43ff61045a85b903b7731ae48c8188569d0b8389dfd484536a4d147d8caf79. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLQ930600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7b661976b2be16856507cdb7a5d666535548eea2e8b195359e2d434199ca62. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:08:30Z), 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/NLQ930500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26225ac19eed89859c78b9746bd30c1377ce4daf6eee4b311844954c7fce7c15. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLQ930500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480099066b962de21717dbe18b6b81098ecc55b312905b8183cddaff0a3133e8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLQ930500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08828698fd19386571b24307d7da87e68e8a36ad49c7f94a7decd59c5340f77. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEN971300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80deef1dd81ed211a8524f8eed57c67fae69ce7fefa234c1e5bb97a08d596776. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEN971300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d681d3ef4cda1ed2ef2b041233499b5ca31ea89a2a467dc8a2a2197720344a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN971600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8770a7cdc6b0f6421a91ae5631ae1269d9587dcbba5eb27a2645c30aad71954. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q1884480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f619ffce23b8a5bbe37793b0e4144c5c90c4ebc36a07ea279b19a3f7d6ee0f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLQ930600067.