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 0x3f03782e383b4e1d90027bb3c66ebcf69638cb5f1af00bff93feb9157bffd49e. 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/3fc2c714-993a-4b41-a7e0-6266eabc55d1.json and https://artists.proofprofile.net/proofs/artist/3fc2c714-993a-4b41-a7e0-6266eabc55d1.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 0x57d7a5f091d17c7437667a8e593c8f57585cd9030e02c5bc3fa2bea11d167eb3. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/ES31E2301395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c71410cefa2bc333c80b6921e3bf03c4a08971fd6ec098cb84e3a2dab65309. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ES31E2301396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4419a1c8f0d1538173b45b49df8893424a2e44fce4c25da1ed81b2005fbaeb5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES31E2301399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89aa7201f4f058c53868ec43be9beb12d9927bd59fdefd1315796767f67ce2e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES31E2301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd353d9230c9bd10956ad871b30dcc957893c32a82144e50cbba903c26ad8614d. 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/SEYOK1213627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04de23bae5661b7f4ff2bac7b2948dc114664da01e8acae9894e7455071337d9. 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/ES71G1771319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa254843217f326a7430591c7f95bf93dfcad8093fd53b5fb35a7d9a69b790df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1771320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde710c2043791df36b11ced4b3fb449670e43e30ca31590a8bbf2a50fcd8436. 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/ES71G1771321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f6b58e645fa446a215bd81836676b9d05477d39110d3f8f6f08a487a090d0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G1771323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1665986ab70b282fb7bb689055d3b574a4c133c343271600e7a3ae2e5309059. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G1771324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fb1d7ffa50372a0dafb4bf1cc08ffb08b8902217f93055916abce383d0290d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1771325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606c940eec975fdfbceadbe6de3b6ff4a361c2b5a347ba44b5d660565ae32df0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES31E2301708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b758fd883f66dc144294e6c2278fd4a28010684b1f0a7c45005b60200bf96. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES31E2302224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cee76a37ece15dc6b21fe5cc9a516ca63cc51c6c72e98eea5e0651194dda26. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES31E2412805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e3994dc8e35f4171e56ef53cf0718e5312f6d49f6da3d7b00cdd8f32cd3dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES31E2415566.