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 0xde9a273d3dbd09604676551c17e4afe05cd632868f3c731aa889727033857dea. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98db5b52-123d-4465-be12-65fd6727933a.json and https://artists.proofprofile.net/proofs/artist/98db5b52-123d-4465-be12-65fd6727933a.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 0x11b95004660b5ac0d65178dae894c45a5ac58ce1524cf9a1078b1d24bf3aeeb2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:58Z), 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/USUM72018150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d59d081d5c7c91cb07292b2951a8a7674607d4d3b6a44c12dd1f5b2afb02e5e. 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/QZDQH2355372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df1bc170b062817ab2c5269b0a8d5c18913db86361b2a5ad3c10487f1e2d1b9. 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/QZDQH2356829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2de9299622e0a0859c1454fafe86d8aa836c68bf87b7a9b02808ef8fa32a89e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2356936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5ec87b5eaf7abdd3398f6bbc7c05824f866e24a20d26507b1897a0e2c151b. 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/QZDQH2356831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eceebd8313a1eb98ef051956726b11e63ac346089bac537dec2ea65256efe36. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2358046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216b97ec3203aa9b7890ffed82ca081d86cab3b76677000bc57b72bc275ded02. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T17:01:22Z), 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/QZES72364357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e3caadf579f828c1b95207af37b94ba8cb175244adb677be918ba89883549f. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZDQH2368546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad9ab3594b87624a67b22c53a192001648a1bafd09cbd02aa1f1dfcf7b0901e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDQH2504768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c96a00ca1f63dc17de3b01cc2d6042687f13842e41ac53404be0ff77c954c6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDQH2512163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9d92d03448198b511429653a2b9247806c3f8c269199751bc7cb85fbfb9989. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUGBT2558977.