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 0x38aa2caf68773ca5632f756b6a7022a5620ccd68f9172ada8b60fc140371d59d. 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/e6c3becc-465b-40ac-8f24-4ef21dd5add0.json and https://artists.proofprofile.net/proofs/artist/e6c3becc-465b-40ac-8f24-4ef21dd5add0.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 0x81a89c324bb5b51e7c45754becbd1f5e90d46d2abf9364aa9205b0878f0eddea. 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/QZTAS2167231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e55ba759b5a1886823e3b8a412ff98c20d184b7b68f1fbf74b44f80dde76d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA62241685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e73801c28b91c67c4b838392e8ae4da8fc4691090c7ae1e7954343c5a0f413. 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/QZK6J2268906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df83d6bc22385eeaf2ddc8e53839cf6ab5b022c1780a0ac1ce81d5c49d9d30. 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/QZNWR2234526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa653fbbba86905634c05c14a9bcc5825a9b26837fdc933be373957f558d174cd. 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/QZNWW2296451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc66ac7f07b28c4f5638c460424d50573da509939648d0a92b09a4a4403c66. 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/QZNWX2260149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750e7bb4bd2cdecd73afb61d5263764eece57425d38743e9c210053c2e80ade0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ22469214.
Every Party (Beach Party) [Summer Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a7a9b7019c3f2807b3e3bb8b011b0e1a220d0baacc28a070753053f97211c5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA62494810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c38846ad32b79086e26a305f1596a1da32e285af3338c828bce948fd1c929c1. 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/QZTBD2455312.
When I'm On Da Dance Floor (Summer Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81023faec7925f4071dd8144ca080784401191cb7e8f720fc239adf69ba89f55. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZDA82587005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8def8dada84e9fcdc098c5c346f8c16a7439055e98de58efb576ff5c5368961c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZES62532397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c7883d64aaf71e9fe44a2b2c7ce1e8ff8203d2017ab6d1f92e19cbf640eab5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZDA82589243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a546536c9208e9ddcf73e57d95d07c5cb31f71bceb18043a3c3c2ddc5fb8a8. 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/QZNWT2547457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8bfcf1582f5da9d1fcb249f9532b1a5ad9faa8af32c3cb1c7b3631e83cc519. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFF2545139.