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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eaf95b9d943e88de10b9caa15382bff34cb93235b5ffeebc8d31c4616323d0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68c9b4f7-988e-484d-b98c-a97bdec743ec.json and https://artists.proofprofile.net/proofs/artist/68c9b4f7-988e-484d-b98c-a97bdec743ec.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d8b65af2ee9b817214ecdcce5bab933ea8fa9955141cdc9277743a4c755c5d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADJ1717318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7e8ae89e3901403091f9eb7ce9e570014500e57af7482e5fa6418c3e083ce8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCADJ1717310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abb69108e02d6fe8ca5bfffdfac72dfbed35cbbe8502ea9a595b29e8534b037. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADL1863962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe32973f691034693a3d3c90621a1bb48e4c4f37bc661cf72f4ab881612ac8e6. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCADQ1866035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b7f08ed7f2d17c57f3680cdd20c4db256ba3d6a860d3932043b30beccfcee5. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCADX1830811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d94f2f7dbfe0b2f26fd5c128ceeacd3efca1f03924ee90e036bf2eb32c95528. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAEJ1907399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c91ad4fe33dce97863cd6c47b7a5325abbe4a899b450834a42224646c0ec19. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAEI1919772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbae9bbded42e56f87d8edf54a6366ef3c714cf499a0fdbaf668f9ac489a6d9. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/TCAEP2086703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4c729e43b2b1fa813423f08273fd855178578594a5043a3aaaf8423dc7be2a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAFE2050974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899782139209fd8b73d92736896d30820e7857d7fff67414c5e1e646623c5e77. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAFG2018962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f2e5fc2c42b3b720f1a104aaa6923aa48ec8ea9439ddc0233726787af7987b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAFH2092352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f6e5600a787c1c9a6af0133df8c9941d98a06c3114886d1189cd2d58a17517. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFK2139096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084e3ebb3475696fc9979510afe9e915c538aa02a68aaca6ff853ee8801a0aeb. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ZA40S2400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc014c51bd0002f765492ea53122f2fe36289e6d02ebb23dba9e56fb34aafc45. 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/QZS7J2406873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044b256e030740918b236a13603575f2a3787a271f1e319e4c01614720c8b4d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ZA40S2500705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33058a06ec48c1f297650664306d8aa97f6faef867ff30cf629d11042eda6c9c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWS2066087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca99fff4bc1af359f8095544c905771f613632d4a78bfa880233b3722eb1152. 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/FR96X2187880.