Quasi may refer to: Quasi (band), American indie rock band Quasi (film), 2023 American film Quasi, a musical term meaning "almost" Quasi (fly), a genus of insect Quasi (sculpture), an artwork in Well
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 0xbfc836b8bfe0f3feba24d4cddf0d25f7f4ea3be5278cf680f043eb33bbe4f163. 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/33ab031a-a87b-404e-837c-28a462da1358.json and https://artists.proofprofile.net/proofs/artist/33ab031a-a87b-404e-837c-28a462da1358.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 0xd41fc836c387b70b60ae1f006eeb200a4222b06eb8c64bae86181fe2d9b3103a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US68F0504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb273cd114346949678b80d24ed837a91f5481639d690a53a18f07671666fd607. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/US68F0504014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d53b8b6e181246224c2bf089284937f1b63a1579dae88677803745e7c45131. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US68F0505407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0703714a48c5dea6deb2aef65a1b9fd417e001176f7628c4d15d8c85fbb0a63. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US68F0505408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b06e5ab25718028c0bd5f548e03dc05cb5b141a4b06bb45215166c6acbef19b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/US68F0505410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9bd03b3caa6b1120471d0212de7d21e9b5853e8a32ff68b2a65af13b05077d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US68F0505411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa4ff1b6486e2325f37166520ab411d4fffd2429d7c4b51a23d13b259e424b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US68F0505412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296808cf915553be35918f354f4f5ad98773de25306c168d7b3f3a46b1350d5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US68F0505413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c18946a692feaec1a3ccb5ff506a33523f85a0b505f3338314aaac0738f6836. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US68F0505414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3867d86f71f8867eb5e5e1a3bee703ec2dbcdd9757c2b62781acdcf639f06a6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US68F0505415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fe421e4699554cae205d4292452f1f11f4be01d5657dcde29198418b7e18b4. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GBCEL9800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1369ed4e4ed69b4b77050003ff1c5aaafc3ff1aff0c143080b9ed85d9d147edb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCEL9800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fbe7893088658e70fd5982bd5fd26f7fb3407e6cee0387b6b3ecde8ef50d11. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBCEL9800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d3755ffa16964ca0a4ba086dc0a6242cd6b7b1070ebc68f1b1cf5f3e986733. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBCEL9800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14530412cc4d3a451751c4d995f35af0e44314bf794a27799214ba92a4a80849. 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/GBCEL9800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2800538d82507d0fc172f6a268eabb84f3c9a8b6536fc7a996673a5ff1e4779. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBCEL9800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79922eb3c4d54e97abe02b11f7149b51ce0bfdb207fe13345d19455c992f1fe2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBCEL9800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7364252be9f805c0d77cb3fe497fe55864b852215dc745d95751041ae2508e0f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US68F0507202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362ce3abb5319def48cd25e920fbdc1d737e4c7c4ab10667ec42aaa78e89d9b5. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/US68F0507203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67aa48678d0327ab36da3794c6a2ac729921ff033af9b9e4cb7aa0c47bde36b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US68F0507204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0013c9bfccd467e3fe0c17c7d8b46430dad3c95f9ef6ddbc54488652ac421d81. 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/US68F0507205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e850eac4b71f67481e7b5d0a0124deff99b0c5d58b23fa2b1719b9abcd3bf02. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US68F0507207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622cb64363c43fda5d87fa65b021683fc39175e7879f0c45b824f189a121b74a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USKRS1358402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8dc751675ff7e757559acfbc04bdef9d72ec30c0778372b6c4eced72d3a95d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USSUB2252803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc412aa5d971a6a25ec630e516c7dc45f8fac6d0a63cbbdf59dcfa193ae5351fd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USSUB2252808.