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 0xa30e35e1b328d5b8d429df777506661a24111a2db965fb4854b8cee34dc2628a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66d8e648-d1b1-48cf-8c63-9383d40a2b65.json and https://artists.proofprofile.net/proofs/artist/66d8e648-d1b1-48cf-8c63-9383d40a2b65.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 0x050dbcbcdfdbebb20082400f692549fe8f345fa3d97ffb17c6859a5c14bdcba1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:19Z), 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/TCAJM2542877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dca82283d3d427564deb3e2bcab2bfc3d59517fedd6df100f8de7f6d17a5449. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJM2542850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410a8a148ab58fc764700c722763cbb2ca4b35b9322d633f971ecfae1d90f421. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAJP2567993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f7b37081d6126be3745d70095e0f0afecf23ac7c2aa917c3fdaeeea40a3c69. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJQ2547089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f66c7bc80e396b40fdd023b42a43f7eca28ad324cb612aa48b162c6b45c603d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJP2547116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79303ab79bdce8eb185b5c552660843ef4ca36efc440474fb1bd7dc5dbd5ca8. 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/TCAJP2547077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4b33359c96382e67cf9f720b4943aa36dbba353fe9c40f8266b499f9f3be33. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJP2580142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b73693f2992e5d2850d3bc220c77782a240bd3a2254ecf71ccacb924463b1d8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAJP2580191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cfd3456737390b996e97d318263cb55b4af89b6683e3f5e365eebacba14861. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJP2580233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacba744168030990f28535cc0796016de62c0d57782aa4ee2d46b5352d7a0c94. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJR2543353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22834c15f7b7b423e5018df2100a16df32bc66f21fd87946c786871d45d209fa. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJS2543529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2a4b0e7aa8f45e5834797d0da327bb919add3c692010b90048e5cae3c6a0cf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJR2543282.