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 0x0e00fde0bcfd846ea69c534dbd25c57cd1bd70787f09d64128c5423cb9fc4296. 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/1ffad1de-fd4b-4796-9d3f-0f53dcd2b622.json and https://artists.proofprofile.net/proofs/artist/1ffad1de-fd4b-4796-9d3f-0f53dcd2b622.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 0x8ce35e2b751ef453308121d6e5620576872fa88cf8e1fa40739bf7e053644999. 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/QMBZ92248056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd2bb4826150db08e87ed7c05a9002128b9f6666171f0bfe1bdda493740417. 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/QMBZ92248057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146bf799dd8c11335fb4c63cf93c87a0bff0f3892677d50d3deaddbc4bb64ff6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMBZ92248059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7b1e41dc2c28acb763932047385003d145d256b2b0ccd619a4e6e20dbefaf9. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QMBZ92248062.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d7df5fac4432c7beaecd3bfe7a4d159e8c12e7de144cd8708901dcafba3f40. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMBZ92248063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea331e9067a8bc10392ad266852a7ca057799bd49c6c6af0749ad64ab4f1074. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:38:06Z), 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/QMBZ92248066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5607b424ab20e13f888520b1df9c68aafd72a5983aed8fd29567c2119722b308. 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/QMBZ92249252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a023b86be795d39c4987003fada80bd1079ef86ace62d6a18a16fc2d26182a0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:46Z), 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/QMBZ92249253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3f63dca234f835b771265ec3fe2dc06f158c0679b6a3d97003612a11d24f12. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QMBZ92249254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5f967ba2820754d66b9da720bb6a1e0ef9ba6e261e704096fbe1c4bf05ecec. 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/QMBZ92249256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798bc753358f22ddc8935431cabde7ef6fbaa271e0fb59790c7f4b8d902eb4f6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:44Z), 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/QMBZ92249257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5f19b9535f97fac73085bb3c1895f317c1d2b7759eb9b5d97fd5fe70701ecc. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMBZ92249259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e51684dc42fd188268780fafa54121e4541937a8475daa934a73c6b384ea5f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMBZ92249261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63249d88982a380d97e7b2ebf5e27a84f8043a96172ccfe008ed71bfa1120d34. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QMBZ92279078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f89bd0ea913c8c11e0916533a1f39ed47ade2206e7c5f8aeaab2fb5ccade8db. 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/QMFMF2200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7dffa8bc475ccc77e9893de5be10fc72d4dfb83f5753082dadcad6ae227b01. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMFMF2200620.