ALU, Alu or alu may refer to: Computing and science Computing Arithmetic logic unit, a digital electronic circuit Biology Alu sequence, a type of short stretch of DNA Arthrobacter luteus, a bacteriu
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 0x2f1d1b92a3ed80d69d93538c4a5f0475b7d8eb9f88b4f2b1624ded6f48017aa6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f58e5c19-1a60-4320-ba70-22b6628e990a.json and https://artists.proofprofile.net/proofs/artist/f58e5c19-1a60-4320-ba70-22b6628e990a.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 0x13f2f79bb892d5d72fa65d87d29b16d31845c7f6384ceb271a590c16b4d5d33f. 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/QM6N22248680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6f5c44879e7db967bd5ce32cf3237e296ec3eb6ce85b0b7445432dac7b129f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM6N22248703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f2f79bb892d5d72fa65d87d29b16d31845c7f6384ceb271a590c16b4d5d33f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6N22248680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c096ac5486a08eac3c2f388087b95469e350ce0b24455097f9a65ece3db871. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM6N22248697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4f7d82cfebc734a878ef7d6c2f95f77f0cc9fe164b30fd7013632cae5f0ec9. 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/QM6N22248700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb0f2ada23de84c26c1cd7ee75891f0aee8aee2e3eb50570dd08f8b0ffa6e45. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6N22248702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef661975c3c393a8b566a1236ded2993f1f574e3c884b268eaecd90f58d35512. 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/QMFME2006179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c80b13e1c98b901f73e6f5f4787b25b6d486adc1666fa79a9f5664fd24aa95. 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/QMFME2006152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250e5a0c47d1d8c5137d59bda6d00346d7b9a0ae29b614e81ea5d7bd9a393aa6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4TX2330340.