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 0x8cf99be152df9af17616fd28f978d314cf0b39b9e411ca6acbe8ab79616fe156. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e0651b0-06f0-40c3-8d90-a7654b78438e.json and https://artists.proofprofile.net/proofs/artist/3e0651b0-06f0-40c3-8d90-a7654b78438e.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 0xb47249db7230a4098a785348cc6ff94c5273c23f2e057ae0ff43340c4188c05c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWAN78060050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350091e22611e9e056e86205dad56861c70d47671f88ba6b58399bcab4bb93e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAN78060051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b033d54a1249ef393d8644081afcc6dbcbeca1be7cd59475a2c0f901847f44e. 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/TWAN78060052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84083f2df022314bfc9dce6f5bda6f2bd3e025c5bf3a5c52cdec76bbba68e8f1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAN78060053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b9fa8e67597d76794fda89f2d7a525e37fd6b1c8c75f18f80f6d5f447feef. 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/TWAN78060054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b9a8665a04e6b5eac7f076d9602568f4501ae2b2d42c4ac868e78dfd32f8cc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAN78060055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce53794c675e294df1a0f8857b72e673e58595f34369b72850a76c299f79b6f. 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/TWAN78060056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4acbf152937859874d4760626c18b2aaa839e2f4eafc28395593dd99d736e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAN78060057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b749dbe426877fc94051706a2e49d721f782db23320c888b11207c1e5332db. 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/TWAN78060058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3462bd1e97694ea9bd766e1fe0d0eafeedf6c473927e7445fc83b29c638d547b. 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/TWAN78060059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1fa9215b8c3c632b5c0394a781521d109f61031ce0063a4032c10c6836e876. 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/TWAN78060060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04096fb8175ebccb1871316481dda555472d34cca3d7d854599d4abab79d4719. 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/TWAN78060061.