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 0xf293725b3bbbcbdf912543b549e852acee3002ea7673cad363d39f2d19d342a4. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a32367c2-620a-4e47-86b8-8cb39cded8fd.json and https://artists.proofprofile.net/proofs/artist/a32367c2-620a-4e47-86b8-8cb39cded8fd.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 0x92c341955ec7b1b1d086a146b952731578d9a45d362935baa00d61d2195f75b9. 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/USDY41612681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d251c3f63028f0ec08f5214d087cc25302daa95db3643b7b5ee7c73f6c400d5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDY41612682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2165559d67adb97d2cbfc22dc8cb64a82881290de64b535a57cb5b517bf287f4. 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/USDY41612683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618eb5075a8e5bed3932b27119db1407d96d0384cb40d3e259f19a2d782df2ff. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USDY41612684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a2606738fbc14115d57ca8b8cd04eb5d8675ec206f4ba8c7346c27a2dc31f8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDY41612685.
Medicinal (feat. Micki Miller & Caleb McCampbell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a31462e0f49b39e8a66b4e82f58777cf5ad8c9f8c5b26cb25f10e8247cfb7. 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/USDY41612687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbfe334ac9c877bdc473a4cdc5a79edd24514bc029fd934094b8b13732f1f64. 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/USDY41612688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d9f62c1140efeae0c91ec5237706c07e474679d167e3e1e6d7c95214b47206. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY41612689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d334fe2022384f441dcfd79b5e7e94329a3b2286f64b67c7f65dfbab2b04c0. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QM24S1920598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c7ab8771537e7676b94cf466ed52479f80aaf9e37d554466d07d837e559609. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USHM21781764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d4c75185bd070d47f3304a9341bb3003e8f37b772141200467c97dda2c7407. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USHM21781765.
Diz Me Quando (feat. Maro & Cleon Edwards)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfd9bc68e4a2d3a7dcb01f8a71de6c28957e2114a2cf4ae74f876d51119d991. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGH1908473.