thumb|Workers and cattle in a slaughterhouse in 1942 In livestock agriculture and the meat industry, a slaughterhouse, also called an abattoir (), is a facility where livestock animals are slaughter
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 0xefabc898a47816e7c4c5a80faf3f595e652b09b4ede6bc3015a6a883b2c12906. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb46768e-0a07-47bb-98cd-3b64e0c3ceee.json and https://artists.proofprofile.net/proofs/artist/cb46768e-0a07-47bb-98cd-3b64e0c3ceee.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 0x8bb50e2b365565d35ea1af3b4855db7bf56f3df1edb5a1a08b42559b65fb5862. 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/USH3G0701811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d076fce89d3346e84a2f9010213b75b075c3fa702438602eae358c85f2758. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USH3G0701814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36cdc19dcc34c4457d25df8dd33f6200b8189b9d2126258c7827d2d1c0842bb. 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/USH3G0701816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807edca208ded2f68802db14ab3aa422215719a079ba2f4197254ed360553fdb. 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/USH3G0701818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad54429f137bee1e796154fc14805fdc978240f0b3b90b179605d39062939cb. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:35:16Z), 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/USH3G0701819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d909e72c9f592da969e9d0b0c45773e4e0b17ce1a6e324b4ac6a925491fa47. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USH3G0701820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde191243823537358e62c4a8b5442644d519c8292a99fadc0a440a6a47b64023. 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/USH3G0701821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6491fd634589a8371ff515d092bd510b86fab5878e4d90efdedaebc068cdd6. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:49Z), 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/USH3G0701822.
Beamer, Benz or Bentley (feat. Slaughterhouse) - Shady Megamix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2994b5c7741015b76dac66f871bca5fbbb7faadaed25116015ab8215b14bad07. 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/USQY51544184.
Nobody Fucking with Us (feat. Bun B, Slaughterhouse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b66b3711d392dd5e2e98f3735880f4c62711e8593f74b681a24fc9959773152. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USQY51562459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243ba43822b875b62ac20d488ffd5fffefc44f635af535594db5b30767245845. 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/USQY51562462.
Nobody F***Ing with Us (feat. Slaughterhouse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ab9f751a174bcda3074cc8e6a91e6012d7eb4329e7459f3d3f297783a240b. 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/USQY51544181.
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