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 0x7140fbc4e6e8885fd77ec2d5e7a1f4518e207de5278432b9b20462e7c21b51e1. 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/5e9d25d9-fc23-4109-a884-8598b8935772.json and https://artists.proofprofile.net/proofs/artist/5e9d25d9-fc23-4109-a884-8598b8935772.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 0x69d9f58cd459adef25f46be6784b7a565605e142ba85bf37bce7d7a090633eee. 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/QZFZ62448775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac8b2e0d8685d60a3d6b81f48e926c4729946767414a6c81ff263b12a23ff6a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:51:18Z), 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/QZFZ62448778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aeeab24dc86fb30193e899bcda34de8404810247a9af2d000ad9f2a93417a6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZFZ62448783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa277107671cabfa60d9509d011c5439ad50ebfd96c9a2e11512e2373a84b7e33. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ62448784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179d754b0577903818f6802446bfefdb188a919da075cb8c032f2bd01ab06842. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62448785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755ee6340cbcfd25832db23aa15be9e3e2338687efdfc0d678f6bc74f4bef53b. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZDA72420483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3932c6bf11e541e1c953684cad047d0b3109a9009554a4d9d9abf53b8b1aaf2. 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/QZDA72420489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f542f86f90ba2fc6483c408ab8eed4b339592f5a558df152a78f358477439. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWS2477716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c65092d311a729bf539183e86d239157d0c8ef180308bbe7a7c3fa38791a25f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:53:54Z), 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/QZNWS2477721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374cabb75df809caf5735e89572b114d7524663bef2cfb959ed0a3e475833235. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZNWS2477722.