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 0xea1d6147737319f16927408c4a9fe674397ca221e59f051bbf957070eec7d0b8. 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/4b8e2749-b442-43f2-ad1d-edbaa73a00bf.json and https://artists.proofprofile.net/proofs/artist/4b8e2749-b442-43f2-ad1d-edbaa73a00bf.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 0xc04f2880dfffc966ba72c251c2dfee0a5a63e46ca1adb4a05cd6696ceff84151. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRX452413895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdf81b0e34f246abfd11964e08aa2e1e954f107382ae7a1fd9a61d1662d64c4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DGA0L2408627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea4a9fe519123349ddd340a83cdf08fc0af5bc91ee513e1f3e6e114c921352. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0L2408629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839941e682362e24f1df940e22d7404e8c91e830f4eb8c307a48d16dae7eaed4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0L2408632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dc42bb7242ea82ae8da1165e8a303467bc4ea96d49814b5451f617c73b27b4. 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/FRX762497793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14afedc8f23d1ebaefd4c94a5263ae716f438754fc8a91510f1272da9efb6da9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0R2482689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e641a1356bdb9ac52d854ea433018c40207c206d5cc21e09493a7be8a306b1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0R2482690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe5a48a5a7e7c0eff70dd71588f29a4bfbbf1a49d20f9a77e8ece4de5ab4eb2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DGA082448417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea4a9fe519123349ddd340a83cdf08fc0af5bc91ee513e1f3e6e114c921352. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA0L2408629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff02c9c2fb7aff863d44f494d81a465b0990a3b4473261c4a0585525e2afd51e. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/DGA0L2408631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c59c098035a47800c1488055412f70d5f35572e40c98318f156c572a2e74191. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA072429793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14afedc8f23d1ebaefd4c94a5263ae716f438754fc8a91510f1272da9efb6da9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0R2482689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f3521d828fd39201ca99f00ca85748691c4a5a556808ec13711244eb26eafd. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:22Z), 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/FRX282598308.