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 0x04717f3b700b5588ea0118f55eb88480eea5573da3993173f36026ea6006f5f7. 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/2a040658-280e-4f4e-a755-03b4cfb9b334.json and https://artists.proofprofile.net/proofs/artist/2a040658-280e-4f4e-a755-03b4cfb9b334.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 0x1aa20344138990ef26fa4f38b14751a736f7b35e54fb57bc35cf95d45008a087. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCK42412665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930d1d081e33f90feeb4553fff32a84adfe507f4638d8468c5ef799b6c3bd590. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEXN92444165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c0eb88c4efe6ec13616e929f25a02338c3601c8f60652d34fdcc0c6d014112. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLCK42407175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981e7ff0728def7ae4e0ce1e67befa31b1d5b4db62e26186df3364abab0ef3a7. 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/NLCK42407178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860272f0de844ba7509c47aa76809577e6191f2fc6c7e0c8ab31d645fdbc96d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42407179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b7b504f52aa7f09b88f33c7a9895673eb0f1c34f6996fb92286ea5e64a60f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2474827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2bb4cde6c9227373e6292f254b4b4c3ed8a03d2fa220e7df5bcb6dd4158b37. 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/US83Z2474829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e9ad7bfa473d0a65463052aac049e82b8c028efce285d05fd173b194bff274. 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/DEEC33501299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e3a27770c96c3edd5cc6de97795d72e449ad74c9e0919a17aa3398b9f62b62. 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/GBEWA2305631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc9834e3b1b25e0ec54c6c17319cbfae23491eb9e368e8c5a53f0d8ec7990c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBEWA2305632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08056e80a12516db10f33fef70125d59f2940a95b1dce1bcac1a850de08e160c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEXN92362035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72da2616d015fc7bd32428246f8fbdac1fa67b2ffad9794d3cbc9cf6ccc4339c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2321434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc57c52a9c95be73406faa6fcd2153f127c326a23d2b322cba9c98a6fd02b68. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42228337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93873635b9e9d17e5863259f7ec069ae1971a61ffce5fa0de18020dc89c28211. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42225409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbb3c7e13569801b3e8db36494c9e2683315a0a94d4f8cd8c5d21e0293ca838. 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/NLEW22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0342631985c8e88a1627dc793359f8356403468d67cc62cb02ba50e2f9929a8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK41085769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b432db951ac219cde4ab795a9cb5049a4dd773caa1bd9bea2e1d579dca3c465. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK41083414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5ce1e3b66c42a41c1675724857c9156139aa17857935c2ac9e829e433ed0d5. 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/NLF712304404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dd1ffc194f4bf2d81d3cb0f0f02236a482e3d009da66784ec81a2f579cd8ce. 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/DEPU61702202.