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 0x7bd8f5375d1252b2c67ea7513e13a66ead45d721403e9ec58645f392f6deddbf. 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/90f36e98-d518-4691-858f-73f515abeb89.json and https://artists.proofprofile.net/proofs/artist/90f36e98-d518-4691-858f-73f515abeb89.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 0x93aa44b5ff665868feca03d86fa2d367413ed74cd6c147b8adf42b95a07c3cb0. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DKUM72200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2921a0a05fa6b166d33bd81238afb8e03ccfa3146b871a1d3bb43fd6fa0849. 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/DKUM72200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ab27601f71a49fca176a448819f9caaaf8756e2b250f50d2d59249107af881. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DKUM72200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26572648407197bebc5c541496eb3eaa12fde4ce532ddc45f285b488a122c158. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DKUM72100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571803c4448f5413a5caefb16bf370253530aa1658106fd219236955c80b317b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DKUM72100486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8b8d2ea9346b8a9cc2fa02c54549e04cdc6093a25b716ab6dc2222709f5547. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DKUM72000521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98ebb7952dc00ae837632aa5df7cca6f0d5d2dcecc5bd7126c04949d5c6e92d. 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/DKUM72100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc114ca57069a3a3c28b7e72bf57d6c64b6da0bab41ad7879ebcce2c2b9e8ec. 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/DKUM72100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36e58ab4d764486d0da6649b3d7ee1abeaddd4c8d0bb9b57e64f1f80b5e9f1e. 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/DKUM72100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68370db240d8f81f78797da2a662f83229739c857044c397517741dfc027e6b6. 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/DKUM72000912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884bc6a58e04b9801c66fa91f7779fa56d76d8170a8c3adbf890f7acdae6c91e. 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/DKUM72100489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451ebf4563d5162775387612d77da45e3c23c30bfd27ae3080d3b139c01b9591. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPPO02303318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2921a0a05fa6b166d33bd81238afb8e03ccfa3146b871a1d3bb43fd6fa0849. 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/DKUM72200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aa44b5ff665868feca03d86fa2d367413ed74cd6c147b8adf42b95a07c3cb0. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DKUM72200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ab27601f71a49fca176a448819f9caaaf8756e2b250f50d2d59249107af881. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DKUM72200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fc18e54d7432e8ef2dae93a63f614ea83e9e31c72868b136a63ffc23f691e. 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/DKUM72300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f42ac59d95a78a81ca4567402e69251c8e9867f016654aaa0a3462e8b5e992. 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/DKUM72100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132228b32a11d178a4ee9622a26d0371774194b7cfd582a137deaa844f0ae82b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DKUM72400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda866b84c8aa5e1479721e97fb3942180fc9e4c344d6bf4b7830d530606309d. 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/DKUM72400297.
素敵な１日を過ごすための朝の洋楽MIX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68370db240d8f81f78797da2a662f83229739c857044c397517741dfc027e6b6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DKUM72000912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68370db240d8f81f78797da2a662f83229739c857044c397517741dfc027e6b6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKUM72000912.
エヴリー・セカンド - ジャパニーズ・ヴァージョン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352cb9b682a5d8217376010fa9ad7379b806444935e9b5bdd9a50f7b3c4a08ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKUM72300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f42ac59d95a78a81ca4567402e69251c8e9867f016654aaa0a3462e8b5e992. 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/DKUM72100269.