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 0xfb6d527200fbf468cbfc151b83929755fd1fea2fd5731f65d56ebe47ac20d7dd. 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/e9e315e6-41db-4728-8606-76db84abb677.json and https://artists.proofprofile.net/proofs/artist/e9e315e6-41db-4728-8606-76db84abb677.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
everybody dies in their nightmares (refix)
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 0x026f6c20404876a9b488c68d9e410d8b5f98b8da21bd3f8236ddfb7a35f31914. 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/CHF032404373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c5f5c6118bc0bd292264d99647a20d282b56a75ab0aaa634290938010ee4e3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CHF032407159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619057a3a191e57d7d05541355dfb6e57102dc5521af1851404654b2ae1ee8d7. 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/CHF032407672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2035d4c4757de7f1ea38ae846f8ea8f7f03601c40c8bf6f5dbb0e1404a5c6563. 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/CHF032410386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5913a2e92d9d477d8b9c5e7d7d83cd6864304759a464ef853df4183fba170a. 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/CHF032411849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2035d4c4757de7f1ea38ae846f8ea8f7f03601c40c8bf6f5dbb0e1404a5c6563. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CHF032410386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dceaa73ec4626898a10264eccf8a27d0497b72d5fce35de5746d977f14a25cf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CHF032417613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bade243bed91db588ca4ecdce05c748ba3772b4e75b168aae8557924b149f0. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CHF032417610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf919045014db009a6f852f907401d642d6750b9fc54c04bd9a6d46e568298cc1. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/CHF032417611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91971b7173eda07d0c3d168de5bc55ca5185a0aae0c1b7bb4b19e768f7e3450b. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/CHF032417612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f232839568713069923d6825fd6144cda90f741b8abee23cdbe9714bb406a2. 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/CHF032419486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e81aa335a8e806b7cd89687cd9dc4d2caa86d0e5f46c106a3b01e60dedc82c6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/CHF032501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e15fb38f5e51900fdcfca32a1836c5ffbaa2d63f24a45fd2cb64809e26f2ed. 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/CHF032506143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fc7560106f48dcec6a708c7ad8697876262147122ecdefe9e40bc88b2816f6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/CHF032513627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287645b8032d2ce393ca6cd6004939c5d7297d679b7e727a7ff074612a158030. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CHF032403843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0200ca6c9c737f165bcaba672d9fc78bfbf8ca21c66ad0c32b0b9dcfe7b28484. 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/CHF032402798.