A bison (: bison) is a large bovine in the genus Bison (from Greek, meaning 'wild ox') within the tribe Bovini. Two extant and numerous extinct species are recognised. Of the two surviving species, t
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 0x0e0521c61e9a089281cb2b3f879581f94a61cddad4f4dd15a2ec8bbe582b713c. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d96f4f54-383a-477b-bac1-34a53ad985da.json and https://artists.proofprofile.net/proofs/artist/d96f4f54-383a-477b-bac1-34a53ad985da.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 0x292a80286cb9fa538b96ff3d711a61565c982985a47b7ed2209725c84e34843c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBSWL1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5778097ee96af32f8e38f189802c2d688669e7233e20b825a174d78360f36ffc. 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/GBSWL1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838ef2228ae82e22d24035722f753b874bfaa633af86048aa98ffa2b405125cd. 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/GBSWL1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ec797980d05dbfa49829c28af3cec103c473167295f2957c31e949266691f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBSWL1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6764bbfd8112e6bcddb2c9d1833524d39d7abe4eb2b0841bd6f1db0ef96dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSWL1200088.
Travel - Felix Dickinson's Passport Control Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8086748a7ee4d43166c400cd7a45d4ea93a9abcbe9cc69a7f160dc1f863f7b. 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/GBSWL1000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b683e26760eed5efd448cdca0c266eb053cd4f9e92ae5aa681da601eb7db43. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBSWL0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31309d0b1640dd08ef6bafdfae92649c48810b5dbdb2b8d13bdc054292b0af25. 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/GBSWL1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624f8b39b271dc9094370d346a7f23fdb9ed5dced778baaa6ceb3b5389790223. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSWL1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02ec05360bb139c42d2d9e97eef5f9f2175471cf17326e845a3712db77bb3ce. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBSWL1000070.
Birds - Frankie Valentine's Air Sign Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78010d7d66a2487f0801684751a42ace8019e628604b85edc5342019c9df9eef. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSWL1000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83c8fd5af6b036c90ddba6a267404625b0f4f2e1eeab95cb49452ce33ecdc0d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBSWL1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71acae993c246bd25620c9104675555e956660852b3aa1ac006859c258ed1a9c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBSWL1000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0dccbbe78242c005ce02b631dbc7a1b5cfd567f8ff5cc2d6c4c88fe3f792e. 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/GBSWL1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13110e76da419eb83f9d37c0ce772bb7d7d142cf1a80a49c12a222891233c6ee. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSWL1700029.
Ruby Running Faker - Emperor Machine Extended Vocal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067c3f234656343c92ad02bf914c9edb87f58594a719b9bab49279e1fce4ba34. 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/GBSWL1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9aeffe86db778255a0d3709946a52cd1f143e52438b7f31f85ca7dfc3ee8c1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSWL1700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42704201b1b0799e183553a31703f053346625b6db60d9e0a70d6e08f1b85e8. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBSWL1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c5fa6518a7654750f664b22df0625f3d82e05c39c538773e97efcb09efa8be. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBSWL1700035.
Claremont 56: 10 Years, Pt. 3 (Idjut Boy Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61af0b78defa2e3d67f1b9beb703d6340c5043f06fde94bd3dc7632c741bdd6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBSWL1700040.