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 0x992cb50464e876b820f9f890a44dfd7a71d69612ae52c1331a812a7dc17ab321. 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/3105fd46-5e53-40eb-a78f-9bbfcc6b75ef.json and https://artists.proofprofile.net/proofs/artist/3105fd46-5e53-40eb-a78f-9bbfcc6b75ef.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 0x602e0497f4b4dd463f8f8ed4340aa2a2e30efbf1d1b7bbbad1251e4bec383e96. 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/CA5KR2259583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd333b0e31baf2e9e83eec72cbb06bae617db2d0a805e52693eaca0c0bbd05671. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:40Z), 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/CA5KR2401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171c3017e5d98f71ae7704e708a389c459a9526f2e18f9288724626ca7a40a75. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2401385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0594e1d3ec20422ae3f638ee28fffb1083cbe3f18cf8fe2f49570eacc357b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:03Z), 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/CA5KR2401386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86d0b1bf44c86957220cbe04f90faf9063d6f2da45242eb4d59756d90c19888. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:43:31Z), 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/CA5KR2324238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86ab60440f92dabb0b2b0d26da972f2f1e46778463a0d6a191e6e839c6483fc. 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/CA5KR2384591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4046033823aa1a9f828a8751b2661c051169b439650f76f65aea9739631d9e8. 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/QZTGW2100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe357aa128b546ef59d091647fef2a5989a104f42d931e8e557029d0f6a7713c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2206786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cfe2b4fa70e76aa38eeabb3c3559f11c50907e2e25da130ba64b25821664de. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2381756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e819946ceba91d5004838ff065698306a3f30879b966ff6557eea844eef7c76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2381757.