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 0x09f52ef74cbd2d4d8fa1fe96f02a9a97cdd3d779cbe2e0eef021acc135c2e51f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a554e56d-e31f-4dfa-92c0-4915521d1fc7.json and https://artists.proofprofile.net/proofs/artist/a554e56d-e31f-4dfa-92c0-4915521d1fc7.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 0xae88c6da3ced344554a3c90f0679b030ed0182c40cb6c77a0cda67545899be9f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QMDA72196285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7ee78d6d1c07ca11d36f49ccd001888479e689a2d76fb079be9de01c8b76fe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMFME2253685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087a2d396ec7d847ec9ef145f07e4dfb66eaa2ff7c1f75012adb2260268841a7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:38:45Z), 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/ES64E2471184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f201aa13aed5a4bcbe004018d5c9fad9e532cd2d8cf018c9b092662b1b2ab7c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES64E2480723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cc4f60b935d92b0d73b087d1479402c38c70c7c7705aadc7cd6a05637c9f7a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES64E2484956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b691afb9d5aea413193b3d148668a097ffcfe6fef99714a09df8e6be68e5b45. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES64E2487393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5d4f6fe8bb676283020bbd1270d74c83b84ebfe1f3996136b034d4c4f9fc56. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:22Z), 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/ES64E2409181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f93e62ccda6d7e528aadc1502f793546bff8e0ed2dcc63de367fcaa3238eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES64E2500639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b1fa728741281c4a71545c3d4abb4f576d98c6a099c1ce47e24d156093db79. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMF2345158.