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 0xe2bce9d77105d53c752f9cc0d5a4ab29d61f720e70b7405a2b00726fca3327bc. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c37b94c4-c370-431c-86d5-6ad1f29b8bd9.json and https://artists.proofprofile.net/proofs/artist/c37b94c4-c370-431c-86d5-6ad1f29b8bd9.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 0x3a33f5a17d82f5c2c382addc494408de0e79262c93f3222c9b84d85232a9e2f7. 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/GX3Q92387092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457d8b93ef9d3f0cbc1c210425de92d62874d4c7491a6429dd3c867c399ddf72. 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/GX3Q92387093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5930ab8181b8fe2d578ece13e46acf5a4b0d9bd9d4d1f7201c4f6bb830b2496. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX3Q92387095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ec223b28b3c565002e6ea47b94b16daf4288351bc6739db2f6e6cdcdd02330. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX3Q92387096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46d84e55f47a666f6f8880b3a33d1baba83084f19e3822bc731c8d5e070c453. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GX3Q92387097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8565fdbda04cb5a7dc05d4c41286cc7667307181731c0e57530a75da36c0f4e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92387099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6064f1f7ae8a9a2982ed29015ecc815fa26aa27dc164dc28d74ea35b6bfb97. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92387100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d6982894d6353a8360be66d12f9eff2deba92a010ee13c84ac83db6eb4f59b. 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/GX3Q92387101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e5b76f7bfce46cf65cd4d6861b3bd6d5f4e45b10f95c0e48efc19a589bc466. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:08:38Z), 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/GX3Q92387102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696c17121481d043601ee2b9ef0d031cc96f7384db6ff4fa9480c627729ed8fa. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:28:26Z), 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/GX3Q92387103.