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 0x4d0e30ca4b27307e53f1cf51b9e5a69fbeee1555ae5402cca983999876c42709. 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/ffaa83b0-bf06-48d5-ab7b-2be590ffe8b9.json and https://artists.proofprofile.net/proofs/artist/ffaa83b0-bf06-48d5-ab7b-2be590ffe8b9.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 0x06ed20a9e464838a6db3bf3f7f7cf450d6663d71b2d74c371a7bed870816b125. 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/BK4DA2315684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8376681cd24b3397a929d4ac35a9a7e5d51e8eac0c49343ae9269b4d8bae7320. 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/ES64E2205463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6bafb0584df28c5400d5354b517a4bf86cf260f3e6f45655b055c0d67b6dce. 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/USHM91885916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1656031c42c22a9774bc94fb5e842f90275bc431e68be59ee70a141222ca6c2e. 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/USHM91885927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc44ab98c8440e49785019202345ebbbd17258a3c7d71e35a69a66d1712190b. 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/USDY41706511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb051bbf57de477882e1fe95d37f2a1bff6a531ba160d6fd552337bae765ef3. 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/USDY41706514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cde5bb6a5a134972841890fab53a31735b86decf2fffbf5e12a71cc5d93b5c. 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/USDY41706515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3de061c29fec6a82b09acca7d32f6f7134ac21c1429b8aecfdc29c5a3a1618. 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/USDY41706518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98be781bef23bd850e46e5b0d0b6888ea833dbb93a9dc3296cc9137eedc89dd8. 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/USDY41706519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79087bc213733efeca956cb8d8930cbc3e8b8523cf5f58d1e8100cd343f8bf0. 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/USDY41706522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87448955c9cf13c926ecbb07aee6741046e936fc476b95576013ffb652051d66. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USDY41706523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bcde79ef001480a319b69702cf741ff05addc499195a64bd55773b0b8a0847. 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/USDY41706525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10d32acc3bfaff557cb65be3edc26f53f543fb0bb95989cec7fd6d94b4d7bf3. 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/USCGJ1693177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc037261da4974acd606b379af9e7f0e2586a0ec03efc7005c0633c99312960. 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/USCGJ1693184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7ade2c95e2a21aecc9a6f56ddc284d4dc70bcd91a2d324c27dd2b5cf4b4cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGJ1693189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4876dafb3b0e30b6560a458d0e2b22991eede097b24d691fec3c5c426fb35bf9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:01:50Z), 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/USCGJ1693190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601dc0f71883de24bb0b7911d091c862be3e0a8b2f1b5514bb5d8cd2deb779cb. 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/USCGJ1693191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32862f77d9377a3d403ebb2994f24f32fa1973391c7d1a2fab1763fa09b2f64. 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/USCGJ1693200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8a6c4f7aa2027f26115389a567db434d1ea16e8a996a60fa3eb593f9cc0f5. 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/USHM91445887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f01dd10bd621e91a3a0cb50f0532bcb10dd9b2556ca888e8a4ecc1a9c72b721. 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/USHM91445890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5675ed26f4e8b7dcf8f1c857167b6037670cd434c194490ac133a6a345346d6. 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/USCGH1404506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69be13258e02342533e64cec53d98a36fc9b52eee4414795fe7bad3896f2b333. 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/USCGH1404510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b5eefa16a86d34111ff6297d0a58c79408f8133c2612352bfda5bb4a6016e6. 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/QM6P42458127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb68374b2f5c1d63ce2d303688d032923e9d74d41e0a76ff621f5905870e60f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6P42458150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88698c3c6854f5c482166bc33c0be9bb47dbc438ac6ccd70b56f36df45e073de. 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/QM6N22473698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd61ce80193c8b429c9fffddb7e6d01eeaced1005bddcad729fcb2c50a7a3bf0. 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/QM6N22473743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb184f04b09dbd1984e3e9c1d92aa3b31b75f8671cf803a4a6a542b1e6219aa75. 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/ES75E2307960.