thumb|NSA photo of microdots taped inside the label of an envelope. The envelope was sent by German spies in Mexico City to Lisbon during World War II, but was intercepted by Allied intelligence. A m
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 0xe2a355286c54b4a102f67ee5e9ce8e8e4a0ab9ccffbcd45733d741224a2651c4. 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/7c06cc74-d447-47ce-9f40-5a2c80735e42.json and https://artists.proofprofile.net/proofs/artist/7c06cc74-d447-47ce-9f40-5a2c80735e42.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 0xf9b53adf528ff3e59499b9c8ea0503dc3b47876e6347514cd2ff7226a733db94. 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/KRZ291812118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43413933218fa08e0e7e95305fb9e26c5fb730856692f8aa27493906c98b34ac. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/KRZ291812119.
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 0xad2822db2ac6491549fb9370c12974c75ce735fc726735fdb22c0665f9fee6a6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KRB471701724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc1bf2bed89f9ee97c7c6291e6f63a53e3d8842d9f5b78516bd7adf69ec64a1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KRB471701725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bedfd04536bd3ed3aa5ac253e08de7e93ddf36f4e7b62c2886098791b114eb. 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/KRB471701728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21022e1039030c00d9ebc9a79f61ca0e69758133b085a40ba344b8342f62614d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/KRB471701737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1cd80cfe8c92aaf58d1f410c2b8c4c2d355ceea6fc8aa27270a87715a65ed0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/KRB471701743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd052d9c4148b761c7b1a9a3476845931fe65e529b21f13dc153f975267fa7d12. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRB471701750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f6206d2b39891bcfb7f516762913dde2b83e0099f47bfa6aecc42b54443371. 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/KRB471701751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303bcef82ee54a56bafd4459057d34c100de1ae6b8f7e5a7ea63a0d886f5892d. 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/KRA381601366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f471c19b5155105382257f12e4e61790f294c9b6f5939c674369cffec9c23b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KRA381601368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0927f83927883c7a7eab84a56dd859d3d548556bfe86f9321d7a49585059eee6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRA381601365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75acc988fc089a5ca7933a067d8be206b868fbe40e3d1560b9bbc2d0ec4b524. 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/KRMIM2441118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f4cd4482b2d7a94c0da0a15d559934cd4523a751a65ba907ec669235877683. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6N22458887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc19578e0f49b0552e7004e3330c2213cd7c4c0d17afafa9e6d41053681d5ad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/KRB471801154.
Thinking About You (Feat. Chancellor, Jiselle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8231366da77177b06baeaa79c9da4f2a7a676d9d011e45ac237b441686cd1245. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/KRB471801153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b213351d44f02362a78ddcde69d5e8e737ef22d260a445779a35cd2f941dc63. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/KRA381500098.