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 0x4087577fc6dc8c0c41a7a717e56d1cc4c1cb1ff0fae7265a5e4a92f5c04bea0a. 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/dc885981-b1e2-4cf4-ab07-1d99230baf19.json and https://artists.proofprofile.net/proofs/artist/dc885981-b1e2-4cf4-ab07-1d99230baf19.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 0xbec1a1a8fc5704cb0865ce6b7fae06eef5121eaaf34c5f4ed6ad68241fc269f3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR96X2418372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0613b6cd9f1d42100a85ad1524d2896f1e43940ff057138133225e926993d071. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKD012311564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1604743aedaf6b24fc5957b800900599932d3fbf323dbda4f6b66787da2fd28c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKD012301857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20581d973721aff0be27326b0642007b6cf581b452be7a1a2afbe97b73540caa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX202448243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72775c9824704250d09a900b66e365941b5dc51285462af083d70758a9da09. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR10S2474932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0262ce045fb7ac9e2f4931d4551cb0dbf805ea2e82dfefb56e2d0ee6f3b93ef0. 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/DGA0R2327737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44920ad7dba328f81e932be6aeee11ce1977bd5e730c4a2424f486bbe653461. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0Q2327656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d3f7dd03424cc7d627e17bfb1b9b845b9c5dbccb6cb41281c9d7bca261432d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA0P2309387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdaf3271b945c50e516fe766b1aec1493ab8c4f5811d708a2df65733a552811. 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/DGA0L2350441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f29d0ca21bf57085922e277c33783f7437fde4bca095576e717f7c4a18d2f9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DGA0L2353098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258bc044f22b2ebe2a58dddd0cd593f913f960fe1fc90110f2f101d9e2afc8d1. 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/DGA062377171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50b8dff0b24ffaaddf9ae8672dea673cbd347eef94e0fd1387c3ab0a2c5b14e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DGA062340070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4b6701e0890f2c31342ee57860ec0d34ddf31317506698b5df2137ed97591. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DGA062349798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c45ab215f416263d34cb4cd7fa17cadbba55445d35a7c5df17b217a1517a75. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DGA062303905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044945f59dd02b417bfed2b92521fe62955833a27020aa3bdf0ed88ce13d6192. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762357485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f09499e2990f51aaa7773d2e3a5293b5831fc5919f1eb135252a38f633f3921. 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/FRX762357068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb0803d95b6190b7eef2b34d6548be95ae969dc8c58d9b3ad450b7b610c33fc. 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/FRX762357069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523d374fe103114131797e6314965658ea84d7fc8aa67708b05b942ccac7b577. 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/FRX762312053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc381a32a0b76c28647a1102b953a61d5a38bd3818c8ed6c4531a77a5ebce29c6. 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/FRX202337139.