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 0x8c4f37c0b81acf3f4ba3e362cb84597855cd160af4ccb98005209b52ce66da0a. 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/42e1c101-4d39-4f75-9fa7-4fb2f4c1046e.json and https://artists.proofprofile.net/proofs/artist/42e1c101-4d39-4f75-9fa7-4fb2f4c1046e.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 0x894aaa3be2a22b33822ab347a5566e6026d091f17487ffec1c54112e199d2c76. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USDY41960689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68efd93e8fb4dcd3647a00d94e2c47e7bbccac871e3c8ddc7b863dd162c71e00. 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/GBKQU2031679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120e56352b43ffa18633278a108802e81ee235b371cff083d5cb7466ad01012a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:21Z), 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/USHL20718220.
Stress Relief (Vogue Down For Mama Stacey Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488cbd1c512843290fcaf6923ff0d7d628b3a6086ba1f5073f8e3a82fddd487c. 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/USHL20718536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2634266f4f1870b86b2f6f00d09bf87b85d0860e2c6917467a4786b18fbefd3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:08Z), 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/GX5MY2454870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aae04a486b35eaf1de2cd5dffa69885c973ce0fccd54302064d4aa188b0336. 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/GXF972441628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c4b6b0d0932bdd7a42456408809a15b1fa48e4cb1857522383d7b9c8d1897. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBKQU2556388.
Love's Masquerade - DJ Spinna's Galactic Soul Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe2dc466443819fa6600c4a4bd4b8baf36aece6c19c4ca5b9a2d57f979a8e2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBKQU2556391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe48c604eb6cc0937d61bc97b128932500cda7024e27b8c68e699889cdbf6e5. 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/GBDLP2501415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e730f1b656324bfd603e72f2a80bf9a07e6b2f08406f3174ecad3efe2fba804. 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/DEY472471325.