thumb|K Troop, 9th U.S. Cavalry A troop is a military sub-subunit, originally a small formation of cavalry, subordinate to a squadron. In many armies a troop is the equivalent element to the infantry
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 0x95407672084a7e4445fbe9fe83516c96b5b4d8c262b47daa61436202af7b9558. 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/bb756442-270a-4b82-ab7d-be71252b38c3.json and https://artists.proofprofile.net/proofs/artist/bb756442-270a-4b82-ab7d-be71252b38c3.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 0x8f5a673f9046a3567801dd4f1b99be4942e78484348417d2a661511aac981970. 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/USAT20107021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce7de0bf74a547bb6f77cc1a1fd3d747cc2287e6eb86c360f27e98be7d6172e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USAT20107025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d96dba433478cfd61937f8709375824779e9d0f1c9e172a29e947a4ccabd01. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USAT20107035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8aced1607134a97961e98cc5dd65d293263f6f2cf11f4dcb77ffb6bd9301f5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USAT20107042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1be39278e1142b1cd7bd91d3ff0063e00b93441381b8d1ee175754e4b42490. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USAT20107045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451adac1527e609799cd0759608fdc00598b6106b8a6f21b89e14f94e3eee839. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USAT20107047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0425800173adc33ed4578b2a5d0d4f997a25c8c91bfa7697ce39d3e5e2b028c. 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/USAT20107049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9460ee93e913614419c37e620192b9c8d3d01cc37e90d71d63262e0d8c324b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USAT21501609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81853ae5ef021c11f29062c879818d9070c2e38d0a8975f926567a644be23ec6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USAT21501611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea9ef5c9cd26fae7aa424236ac1e95f8c0da6e8920314811577b3b5468cd159. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USAT21501616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58b2674355d87cb123b5842c323d5563e39ade40de8e4d4e90e324d44a0f005. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USAT21501618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf96dd2103ac0df62df771f0cddd0d7f0d85cedf717dda1cc5e1965438528fc8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USAT21501619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba344b727fb2726491be5543c44c10a7cecb3ceec2c6992f9f63f67c64481713. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USAT21501621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e27ffec6a9b1cc3a1ed0ff982379ac95c52f6be6f1a454d6fbc4a66e760406. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USH6Z0700187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb965e6d00a4fd2e085924656637e9621bbeb1c11c9675a0836389d253cbd0e13. 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/QMFME2141897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5e9a426f6dd465058e572f69a7aeb14868184e33359c5e86309f46d0c1151. 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/USAT20107043.
Born Into The 90's - The Best Of Progressive R&B
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a66e0a641a5f119c5227f86bb94eedea0f855f3a498cc5700108a783db95dc. 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/USAT20107044.