{"copyright_id":"0x8990886a8cd1aa9e4c9e9d58ea44bbfd21e63f00c8e8f45cc70148aaaf9b38ce","name":"Donald Sinta Quartet","registered_at":"2026-06-15T05:03:04Z","symbol":"NIM0690370","token_address":"0x1c1a00ceb73bc41717e7f1b79effd2b52c2df3aa","type":"artist","uuid":"ea61a8ea-4f73-4be7-bca6-aed07f55f32a"}
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 0x8990886a8cd1aa9e4c9e9d58ea44bbfd21e63f00c8e8f45cc70148aaaf9b38ce. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea61a8ea-4f73-4be7-bca6-aed07f55f32a.json and https://artists.proofprofile.net/proofs/artist/ea61a8ea-4f73-4be7-bca6-aed07f55f32a.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 0xab54f14c7e00a716047fd8eca3212daa49bfdec185ea74a158513b1b780e80ed. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM21951860.
Ex Machina: Machine I (Let the Funk Out)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b34923e2d5f4fa1a4b74a2cb63e6925463ec1d3f8a78d1541c7eec41ac0710e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAQT2000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785fa19e88be9165f5ad9915b2b57f34a8358617deb8d8eb40f49c1147f17409. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAQT2000122.
Ex Machina: Machine III (Not Quite, but Almost Pensive; Sunflowers in Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c044ce4494b322957d40842ee1006c882d200b0c8d91468d1561d698144ef9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZAQT2000123.
Ex Machina: Machine IV (Dancing a Mean Ghastly Dance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff32ae95c22e3c9067a9d4f5cb4564130b0c56d4f7afbdc1223391726c416d95. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAQT2000124.
Ex Machina: Machine V (The Morning After)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa355a221a6a4ceace60a54f8dbc96df56c093d86d5b37877435a8c429d7edac3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZAQT2000125.
Ex Machina: Machine VI (Flowing, Lyrical, & Songlike)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc23236fa931d7a02af3cb24857cbeec4cee0a8b281102dc7a79b921109fa0b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZAQT2000126.
Ex Machina: Machine VII (Aggressive & Funky)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bb7bb6adfdcafdf5e2d13bfabb3a42afed18f84e72293174138fd504d614a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAQT2000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d964c77d795e4c84ca78bf9cc2cdb2d18d5a7c8b75878a41b2148ce7bea1b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZAQT2000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25117e6bffe4948d550b9e5cdc6790f06d1915ab943fab3d2666f9079f0b86de. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZAQT2000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3b9bf0ce6ca1ebe0e4e02f635e775de7ff01db96e0229699bc4110eacaed1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAQT2000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9049eceab82fb4cc5566436131fc6b4dce80b7765fa58cb8f97aea04508e202b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZAQT2000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20857765b6a4054411e89772439e223990512dcef47a9da21d563b3dcc0ab3. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZAQT2000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf81641de0855a2c11175d0dc5bc9f7730e49f634552fe39644aa5c80ece152. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAQT2000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108d008508dd27f0448f0875420490aef91437676952263ad8aea4e0c4dca430. 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/QZAQT2000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4427c6ff704e5bf98624bbc9502001237099af9cbb80b3bd86ab7ffd038d01ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAQT2000135.