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 0xa780880d800bdb1f85809229a77a4d206d7f48748bb22f9d56ce03e9c2452352. 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/b1e45a23-348a-4676-981c-ece750b1705f.json and https://artists.proofprofile.net/proofs/artist/b1e45a23-348a-4676-981c-ece750b1705f.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 0xcd8f0fcfb6e0daaf84bff6f7458374d5108a139bff79598e0a4e169abd69c3bd. 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/USUM72414518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4b4ac7d78a53fd1f71c97cd1b9d1188a5e91bbcc8a76397797329c3a8931fb. 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/USDHM2209739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a16a7fed51f1dba4bf3b5a05f2d5500772da2afffe03a0a55894546d57c043. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZFZ32343284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0355b249c0389651e2e3bcc6357d57830653be092b2428987c935d1623974. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFZ32343286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf285dd2ee3e790a0f219b0e4925ac8afb77ae580d565e91cf28f979024281971. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:56:37Z), 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/QZFZ32343287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39df2cd6bc56df32f7d27413deeaa404b0a6c1822a5bfc6a4b9c6d4290c75ed. 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/QZNWT2228802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616f3f7bd3a199a89f30ed2a59ad66360d5e81ba90cba64036b5d17df69c505. 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/QZHN62532329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef58fa7f2095bf57b1c4528a8621138b020fe1d3e1c1ab53027e19c263c345a. 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/QZMEN2489584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa200f903c5fc0345236de681b19366df7e47ac54c6214c83fbd749883b50cd86. 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/QZHN62406715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4b4ac7d78a53fd1f71c97cd1b9d1188a5e91bbcc8a76397797329c3a8931fb. 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/USDHM2209739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae4c2b2cae9e7058320cd10c1b1bdbe140b89f8bb9f39889bc499fb2110b7cd. 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/USDHM2209740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39df2cd6bc56df32f7d27413deeaa404b0a6c1822a5bfc6a4b9c6d4290c75ed. 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/QZNWT2228802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178b1aa68e648e789a94634f407700769f910658f7f542d8e3b5421fbc12eac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEP2058481.