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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43234c3e5f96752beb16ca454596700c7d1b335210e30936bbcbbc23c815fe1. 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/03184419-b653-4ea6-a0e7-4f64ce822ab6.json and https://artists.proofprofile.net/proofs/artist/03184419-b653-4ea6-a0e7-4f64ce822ab6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3b01ddb5b5b57d6060721d6c4144a8bbdc2dae52b01dce94b42ff03f4bcd8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA72135472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed0ac20fc890dd87c86756cabd35f2118d952dc902e095d029f0e8313d69d82. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:45Z), 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/FRX872194251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce18c7606c92bcc362f733b6a5b9c004c245c489282c63adf64dc8659eae0cb. 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/FR10S2238737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bc9d38b7b94ef13060058194c0a0f3f9911d14fba7e753755f71cb3e03d02d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FR2X42241793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf984c2734dea5969b5067a7503268a62489bcd0ddacc4dec1e5eaf5511491d90. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX762238449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8452cd87a67c8cf9849b0ae7b3ca7dc29bedfbc05deb78a1201a882b6c5290. 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/DGA092214604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c2c62df02460c5523886fb6eb418a3cb9e857621d89a88c5ea7a134bd9e810. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR2X42380428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed88813b4a83a91fa7a5e5637d767310fad265f8a34272b581ae9f4829726842. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DGA072240915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7993833468bfd792771edcb87d3e89f2b826e982c879589711eb28c8c47c5f. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/FR96X2310242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8452cd87a67c8cf9849b0ae7b3ca7dc29bedfbc05deb78a1201a882b6c5290. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA092214604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7b7ea8bf002bf07c7bb27ada97337cb3f4ca77ec6ced2ef50f3c34b72c16c7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X2310244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa16c0efb454645374bba7a7800d8b77cfe0f797d2ebe2c038a8746ab1617c. 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/FR96X2310245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e95b8c62de14db559d132656bae70769d97dd43288e736275d400cbcbd7a1f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DGA052350804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f775dd041862c290753ae07443c464e8ed69e421485bf7d3ebdb95b47c3485. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR10S2423110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907bdc0488818c6bc9de6e915bea8a1b7c08eb3278517ed87a5b48ea74d86f4f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX762472107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a4aeacf94cdf0cf9cd6a6656361a795b594c58e61362ed59ad5b515dd34cf6. 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/CH7812234853.