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 0xb480962beaa8ccb9493f660598cbe122b48e7f08b2d2b91e0497d1590cc6ddba. 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/54d70a7b-2abd-4edc-8ab6-a9490650a828.json and https://artists.proofprofile.net/proofs/artist/54d70a7b-2abd-4edc-8ab6-a9490650a828.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 0x697e754407011b03c1e73b0440fa569347bca18fbafa6caccdbc979793df9269. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZCE61848622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab51bd6217b9dcfb98b4f4d263eac25bfa499eeed161678d4896ae1d99ceb74. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/NLF711906109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a7911f7f2c0a8f6106f02c640130485f3683869b132eaa1e89989d8c8468c2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLF711911995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285de1db4de70be2cf8dd3ff7e4bd465bb6aa3aa781795d8d5dcc8aaf2d3a05d. 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/NLF711912582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f7189305da43110e0f9f85c15f321289df4a0a59561b0e6980c27f65a9754. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA72180863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8de5afd731429e534349bd58a9ddcc9d154adafa537c6c465bc407650de11b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNA2144242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97060278590909498c11b137634f9556470f3e70229f15e887d2c22d7eac2551. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6M2178245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d2cf2712f36301905fb89f9e224325accabaf413083de72766b457ba91be3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZMEQ2188082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aefefd9ec0944b485ba2327396817ac32e471e7b9d97a81262d63359f3d891. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNWT2339049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4ebbca0deb5e48dd423c5120bea11a07fe05e7db8011281c9ac0a12c840655. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZWFG2302540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cad348f23cf9c7c5a0e7456e42524e605ae5206f3df7cd76fcf7539095f3ca8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZES62482581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08527c8fa5244639f8c0b8baab1880da816983783d28df2211f7927330f15d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFK2491301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b924e38fef675c6a35ffb36eb53b70c367ffb01dda5f5ba926e5a62533e0a97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71923667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd7e7b6fde4bdbfab0400f9544ea0ad7dc30a8621636a3ffa0fd5f6bd8d8df7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUM71809473.
Haven't Seen It Yet - Asher Postman Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c925cbed27f4d91b2f9f1e1fb11968af9a1038552abbefa6cb6f399bcabda0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUG11900475.