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 0xa430ee714ccd7565cafd20d420a4d3f390bb5c76fe0dbfe1d914f24723286ba1. 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/6f30f038-80aa-48b5-b5d4-d507d37ff618.json and https://artists.proofprofile.net/proofs/artist/6f30f038-80aa-48b5-b5d4-d507d37ff618.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 0x4ecc4d2395faf88179159570a4d343b367a4ecdec143135af51b685449697146. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZES72308314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301ba6ab556b3505f083160b7fdf50790f19cc17c7814d22f96117178de45a4e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN72494079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c08e66db919b45488b134c70d373c175f33698f29d31a28b5ae3d3f39f34c86. 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/QZNWY2436458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2a836c0aad592da4f0ab4987ebc0adc2c220d3acd6c78d943816985929ccb9. 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/QZWFQ2402828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d420a244f7c8120a0b12deab357209cf9d19808a76afa0c698f0b48fce0e9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFQ2402829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ee563706c30c50ff55c9adeb231ad20cbe2cb5f5d9733fb4ef29acde2032a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZWFQ2402830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f53e069dd40b83779dacbaeba69f585a63652a92d66ad65a409dda3159ee419. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:51Z), 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/QZTAT2454666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16703d49f9345610b73d34b71e1f1f0dc61cc857402a05d7685f996f714bdb66. 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/QZWFQ2402834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168ad560ca91881d3e6f7e467e3fee7454a5ac89e2e4f5eff3c39c891dc49fdb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFV2456966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae91c72a27cc0ec7917ca459a14d2f7d32508c79a33d1f6fce0a7bc767e9e50f. 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/QZFZ72517789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d5f927b874496d3ec579fead52f2f6d119176a12eced0fc3b228faa1df6715. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:21Z), 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/QZHN32587587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072d92f3dcab62e5ffa4e7342d27f09c8903b09cb42f35820618552018a78ae3. 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/QZNWW2502902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19c1f3b3f9a3c999ffc4399e3e61d56cd3f960ec71e9d502d96d789e5a876aa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPLR2584250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc118741d9031f9f1724da6525748392c5a029b62e76b9abc7482873d6e8e8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAU2588603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0343024e1e745fa2091481dc169117e22ab766529ec31eb62e2c8171dc0c0f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7Q2536831.