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 0xbcd7efed409f230c5915e1250b9509d6fd41e8a08e8741fd232280661948a27a. 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/4bbca724-c381-49a7-9045-99b50e87bdc4.json and https://artists.proofprofile.net/proofs/artist/4bbca724-c381-49a7-9045-99b50e87bdc4.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 0x01244cfc922f9a6951ec1dbf3a89a7de12a3f3c756aab799c2f47c59a9bda1cc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TLVEM2463078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5673d32f4e4d3f4c7f9c4d68cb2cba1d85d995ee6740ba5a5af53f7eaa56cf98. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TLVEM2484237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bba78e1ca2bb2d025c5e6f7575b27a42a3af3250d44ef05605b106d1aa2be7. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TLVEM2484218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa041dd757afe472b2e2585f85b9a1b364b9ce39b62d73b76bf824f6df8f4dd8c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:35Z), 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/QT2VB2405813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1cc2eb3060c0e08732bc54cd71e4ba5d6b4df4fcd79da1f73bf307a5b72bdc. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QT2VB2405826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd307c0cf525eb6560f2d6561d640e3f3b98f78ac13a7f56b41f6647e29fe3abf. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:41Z), 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/QT2VB2425447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad61402c6bf79d66cc2f3f85fdef040824ed8095e32d1d62e256b71b34e449b0. 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/QT2VB2429353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305bba6d06a705ad56e9aa7c5af3902076a854d716667d7cd84030d491dc6cc8. 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/QT2VB2444074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f7c88c1d429b23e2339a301405060c9498e4b5d782ca619d4f9ddd87028e26. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QT2VB2449650.