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 0xb8476149d4bc7ea6ea89a0a8f8cf4747cdd06c6dfe2ddd73a20d148299947556. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ea93efc-1cbe-4cc6-82c8-d317ae95e4c7.json and https://artists.proofprofile.net/proofs/artist/3ea93efc-1cbe-4cc6-82c8-d317ae95e4c7.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 0xb97477fe86be985f37ae0cd2b36eda81703a5336b7e40c462055583cfafcf185. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/SE6I31960836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19046da67c74ff9c4f040f3c533a39b8f6ea80d224f1f4d01f82227e8d52fdaf. 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/SE6A92054208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff74c329ed3c50bf72ec11812c2c4a688cd0e9bc28695f62b7a6df8a1ce91e16. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:41Z), 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/SE6XY2238759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8240d5b6bc0881166a0d2763bea009292dfad7827aabee563b1fff5ef52b05aa. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/SE6SA2389510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb12e09ff81cb9ad52d9a56ad6beea44a50ab8773ecb54d18a6a09c804055fc. 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/SE66N2320029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb487847172b051d0ec427e2e4e09d69a71e97b89add2e7e98598f43a1532540b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:52:19Z), 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/SE5BU2401462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b9dffefe7c4e6e34a9e181c51182fda72c2c3f5bacb6526872f697f50cc41. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE5BU2585267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f198a04da42604d5ae36a2bd88d9d4bfdbba5e44d794cb9a6a232a46178ba3c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6SA2546240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f31d7998878975b20f0cc96375571a02f1ea1003f3323959242503a826690f. 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/QZKDK2013040.