Alt-J (stylised as alt-J or Δ) are an English indie rock band formed in 2007 in Leeds. Their lineup includes Joe Newman (guitar/bass/lead vocals), Thom Sonny Green (drums), Gus Unger-Hamilton (keyboar
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 0x644f7361670c77f6459f2b5a809770c9c7e957c3c9c3b9c68589fa28d0912e65. 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/34bacc75-2349-4627-9bb5-2daa351e333e.json and https://artists.proofprofile.net/proofs/artist/34bacc75-2349-4627-9bb5-2daa351e333e.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 0xb9a46b76ba701974f52e0bbcb8858d612ccd23e0233937adecce1f17ae228162. 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/GB5KW1902832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a46b76ba701974f52e0bbcb8858d612ccd23e0233937adecce1f17ae228162. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB5KW1902832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad7886f394618857a64db7466518b330ce98af33d4ce2b5d179f45ad3034f66. 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/GB5KW1801521.
In Cold Blood (feat. Pusha T) (Twin Shadow Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852dee9d19c25d75de4c52802742447afec4dec772b9657dc7684d11e29e23c8. 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/GB5KW1801523.
House of the Rising Sun (feat. Tuka) (Tuka Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b6dd9d3d4ce113730c03ac830a4ae7c2fae85b6be0a1773a3579433f850d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB5KW1801525.
Hit Me Like That Snare (Jimi Charles Moody Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682cd0b3123768ee0d20b4d890f7bd934028133562525989bf4a8085f8a7b5ac. 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/GB5KW1801526.
Deadcrush (feat. Danny Brown) (Alchemist x Trooko Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5cdb876c783eaa2c8186a0bb41a6ebeab0344a07cd0ab2ceaf5e895ed14225. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB5KW1801528.
Adeline (feat. Paigey Cakey and Hex) (ADP Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69f42a50c5d9277ad63fae13e6fd225f2fa3101796e320f2e4fd522aae86bf9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB5KW1801529.
Last Year (feat. GoldLink) (Terrace Martin Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e367299b1f6ac84e97856b2266cd0d94e198a0865895513eceea7d9af0c965. 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/GB5KW1801693.
Pleader (feat. PJ Sin Suela) (Trooko Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52e38ff1ecc7c1e8de6548c1627901a668e38b422c979144e471845bddc7aa5. 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/GB5KW1801530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352676f832f47a3b0f8eb844001426c61b329cc8ba1fb5d43749e96a978624b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB5KW1801522.
In Cold Blood (feat. Kontra K) (Kontra K Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc573102a98adc276f9fbcdf35f86b074108953f8e4810f0050b2ff2716876534. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB5KW1801524.
Hit Me Like That Snare (feat. Rejjie Snow) (Rejjie Snow Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fffbbdf94301567145f8827b5fe5139f68fa81b5c2c2287d1dc30062f7ec47d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB5KW1801527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae603385b099ad513314652a0729a9949ce9786fb83c5290f31048f657f3898. 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/GBZUZ1200067.
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