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 0x38029b2fca58d058b4fe9f2552d9a6dd3a0d5524a8631d531f2be8671d16b6bb. 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/9389256b-8f44-4921-8493-25d16b7bebc6.json and https://artists.proofprofile.net/proofs/artist/9389256b-8f44-4921-8493-25d16b7bebc6.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 0xb292a3d2d9f9fdef12484343277a65f18383f0b14e74504b891bfd234e67b976. 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/FR9W11702613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407c20ee35f3c5a7eba5c6e94fb3a3a16682b68988f7bd9b55c51ea926182ecd. 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/FR9W11702614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9833155ff070bd27f1915933cf17d03c8085797ca02bbc5b170fec30280129fe. 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/FR9W11702615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ff4f0a36d9bc2ccdcbb50029d9e5577622e9dc571dbe7fc4510e65b3b2b2d4. 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/FR9W11702616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49692e02a3ab36191c6cc9578b4b248634550e87eb4c429e87f877e049b9752b. 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/FR9W11702617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263c31f0daf669984d16d7839ebac15f41083380e8986f8956ac9991863f723c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W11702618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e8f355f668cdfeee02da59ffb61f514156ef20b7f60da4442c2750ae9c5d22. 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/FR9W11702619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6309dd9b7a61b4fa3e7a9f076cd458d2221ad07dfeee0b7aa7715f57aec1c3. 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/FR9W11702620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a15a7ad7cb2d9b9d2755b895f7e748849c5e260b7a64f11fda49597e68337b. 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/FR9W11702621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a41f6e0818a3235c161ed76f330d5a7e671cb8ce22cd9cd3862f8e45a61581a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR9W11702622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc167cdb95b091074b98a4ed144ef568ec14b8bbf04f09821b70baa6dcd04a563. 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/FR9W11702623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dc6acb7ab14a00b25f81743fa1bbf7ea52ff86beed42251c8fe8a3e1afc0b6. 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/FR9W11702624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240cf57206438822e570f6ddf79ecb23210386cdb1fc04607d6d5582d237be7. 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/FR9W11702625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30afc25b2e055facdcf18c8cf3e9ec09643fb7cc392dae13dfcff1b99c861976. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FR6V80779390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4941eb7d68e7ac42383c161f229588d6f9fddc7b10117b596250a9e7ddc352fc. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR6V80779391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9941b6dec298cfe9345863070c0b02ec8f960aacdd596adaf847eed3bb2459ce. 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/FR6V80779392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6fe664ecbd96c308fbd71a579723812f3c40f341dd4100c8c3bd32d45f8ee. 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/FR6V80779393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d997bbaf91a6a6051e4bdd752af408d4d6752f57c975c896146311a41d1c349. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR6V80779394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8f7a85cad06d96bc7e4ea006769eaeb627c2a8b6b56423d64398c34e9c5140. 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/FR6V80779395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24027fc3cbdabfc17e63db6f18298adf59350700566b7b272ec17654bf6caf35. 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/FR6V80779396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81676203dc48f3ff4f19335dd79602f43f1263ab541bd47351cecb0d398fefe6. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FR6V80779397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c7e9c64a83c019918bd7326edc7ad384b9943991458dd2353ceffaa00b659f. 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/FR6V80779398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e99a16dced0e205e06241526fa60bdea8f1d7a9f97fc45c5cb6c9bc4187129c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR6V80779400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3cbab801caa8a622d440fe4c0f2acce34e3bcb82a84e75bf349e284b1a88f2. 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/FR6V80779401.
Les potes iront, les potes y sont, vive le cucurbite à son
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f74eb44a5ed9e2ebd701e19c1bbee873f495baea2d6913b93e2673cd3ca49c7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAEL1946701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305b7e8dc70d6509493586c7badeb8499fb6b2262f65902ba8d3e6a1d7501098. 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/TCAEL1946702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9002108c9f687726bd46b7cbc95d2c3aeb8f5582c4cccc0a76badafe035aea. 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/TCAEL1946706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9133e940b76e7f765ad2c26f2eb6e0196c2d4bcdde87d506af822c645bec07e5. 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/TCAEL1946707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1681d1485ed19f282575df5a86939cd7c213b1304ed43ca996892c512a13898f. 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/TCAEL1946708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d51ba6f8378f05b832af65b8bbf339d62fbfea376dbda0fe7d7cc226e70cec2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEL1946710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa08ad734261a0954b1c08031edba126c0f048ee0aa1d49de457c56f1f8c4a. 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/TCAEL1946714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801d9b36609c113230bc52aa6fc1a43f65b5d7e48bc64ae95a15359522012fdb. 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/TCAEL1946715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fb3fa1567f383c9b1378bf9915b07f055d879c7aa60d79a58443874c28fd38. 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/TCAEL1946716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9c839cd0786fdc8f07ccfc1ea856aa51c565fdde83071cb575836f870781e7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TCAEL1946719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e873d206b0361cc3705619924f6bf38006960241d36316b0b906e72f06ccd2f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAEL1946721.