Altus or ALTUS may refer to: Music Alto, a musical term meaning second highest musical or vocal type Altus (voice type), a vocal type also known as countertenor Altus Flutes, a brand of concert flute
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 0xe0fb4a5b2ca9ebe6ceee747889aa244fbf79d17e2533daf3ea9c37c3e20cf944. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/160ee73f-af3e-46fd-826b-7eb2bbca0e2d.json and https://artists.proofprofile.net/proofs/artist/160ee73f-af3e-46fd-826b-7eb2bbca0e2d.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 0xe87b4dfb2f6645cfd82ef55d1a54b5c0c795dd24a0bc56a4e49ddccf706313c4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ22B1905172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510c2a1ee7748db99f449e463e93c0f4c5b82842c17a8649548ed5424bb4ac2f. 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/QZ22B1905174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b104944e10291d3a900d9b548e2ad6a28492d5343f95617374cb4561dd62a. 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/QZ22B1905175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7379e4a1d188cbc91c29dbdb6280ae48fe823db2a6bc55054a59c4ea90e6c1bc. 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/QZ22B1916808.
The Time Collection, Pt. II: Time Forgotten
The Time Collection, Pt. I: Ghost of Time
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135186969dfbd56237e7cf03e265bfb8968b8cf2528f30174d991b50dec0b467. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZ22B1916838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4322fb5d7e6d5de736669857bbb6f9443ee507ca39615b9409db3d09529126c0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZ22B1916839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe318665484914d2cfb77284104570feb382ddfb8cead7232bc37d01d5a022b8a. 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/QZ22B1916840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b003e1cabc6699955b5bdaab9cf36bc10a050dd504358e119d04dfe5bfb2dcc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ22B1916821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b6c9add987b8a7bfa2085f97bdcf9dbd71a8534e6cee301235076ea6ea6fe. 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/QZ22B1916822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6415b7163ff84c6556a93b4fcab5a13d5fc044808813086af81eb98bc646fb. 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/QZ22B1916824.
Winter Embrace (15th Anniversary Edition)