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 0x91a5d5dcfec76050e8aeed002cf1dace1591ee410a0a086d51e32dc25abeaf89. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91fa54af-b60b-495d-998d-8b41ae871ee8.json and https://artists.proofprofile.net/proofs/artist/91fa54af-b60b-495d-998d-8b41ae871ee8.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 0x54f9b97d60bbfec1d7e414ef2bf913e61c7c08484abe335ccf708921e1db3a04. 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/QZHN71992157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4d1fe222c184f8ddc6b753877eddf42b3819fb123c7becef715ffcaab016ab. 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/QZFYX2051862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578d182e40b0a7b0a09f244cc4ee2668c4c6d68fb762d27938566944f11d7d8a. 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/QZHNC2087439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06da17a4d16b80fcd2099d68ad1feee2e426768685cb6e54c516196c5b25ec5f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNC2087440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f6699b61afda2520a3bdd7eaf716754b48271f4e8dfbc4c13fb0d27af89920. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:52:08Z), 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/QZHNC2087441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa873809681575d668f0062b4e8d38405f6deba4aea8d1e0e1e1565b5f4a6a9c4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMER2168475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd870aecba92fa044eb44c52f63173da8ad7e9d73ead089e3abd1b2469843c20a. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHN32254480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca26ffa2247433a97ede15356c6351e683f9eaca305931c539670c2146afb7a3. 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/QZHN32254482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c8f0be8834fa85af87951f1fd7e32a821710317e3e9dc1ef388f0f57d4abd2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN32254484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dfbff3b2c5bd66b586c66f146335febcf346deeead04d3f5954a963f556c42. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHN32254485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cc99453336e6f2b695439b5feb945cd959f68fb8eb964feca953e6b8980b7f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:26:32Z), 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/QZHN32254487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e713338b34279c43385e207eaa4ea130037d2052bcbe04d35dd3a4f61a07b4e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWW2369378.