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 0x82b7eeaa5a8b44c10909094dd7cb9a197132367ef351d2ef235d2240a014f1dd. 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/78c93122-506c-4cd5-a2a4-0048f15bafdf.json and https://artists.proofprofile.net/proofs/artist/78c93122-506c-4cd5-a2a4-0048f15bafdf.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 0x8de61d9861e086644ba13f6b1991c1cf80cd0463aa1e63711b7f494e2e97f36d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP52233486.
Memories of the Outskirts, Vol. 1 (Chill Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa416639362523e41c3dc340fab0afa6bd6587819401f769d9c8125e1b5f03449. 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/CA5KR2201222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4754cb6caeb1aae79f832850c5679f620c850d8b68ec5f66962a8f7d2e4ec39f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWW2147908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995c51e6910bf098ec69cc92f5760488c657211891ef4d16dbbecbfa9d5a82d8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWW2147909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05335a34bd9b113c972aa871029050219d317ac963e4195d8f4a1509afa748cc. 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/QZNWW2147910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb836397816426a23566bbd6622b08434b5a122448dedc05a231f5fcab15ce7c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNB2157487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5f94d85bb83b28bace7366eb6156bc54d9dc132ed964a2f5fa4ba848a2147. 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/QZES72126469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6591ba77e94fe4a5d408cd750917713b118fa1bf0c5d279d33a67f27abe0e428. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ42190647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1996bdb05d153eae128350e8605246fc7586e2c8e0fb4d482bbec98a1e9690c. 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/QZMER2032838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc92a4d0648b023f48caecad74ae8617a1a7400eb9df4f4da42ab4da366b54fd. 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/CA5KR2090163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a06461da1da759fc2f7894ba68947eee7076dab109d384175ad25ed22063b1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:45Z), 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/CA5KR2090164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a7d2bd8d9b3ad5ea2c30bc987166f39c08b2125cec62554c8eaa144dbb3b1. 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/QZHNA2027267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5565fb6694b6359c7ab4c69975d3d3e3c55e8ed8e192805a1c56b7a8f4637aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN42058304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c74ba9ae4eddd48007d98db653470802d25ff3ba3fa842d7720aced726efe47. 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/QZES82002987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f80d7833391439a7891ec444400e1637888fc8f78edafd675198911c04e30b6. 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/CA5KR2034065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62640fd6ebe2ce2a091aaba255be8471d98dd1733b6d28742b7e8a562cd12a7e. 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/CA5KR1823651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179b97df2b7871c1d50e8c0459a9955abc94390a0d1802abad3896961fbaa10. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2114311.