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 0x18362372328b980778bfd0755258529fc0e36abeead0298b286153dcdd0d9935. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8c0c4fe-4482-4f86-974c-d51e514926e3.json and https://artists.proofprofile.net/proofs/artist/e8c0c4fe-4482-4f86-974c-d51e514926e3.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 0x89c1b8a9b2c783c1099fd038e122b69d58f083ad2e775099e11803e6db1af219. 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/DEPI82215828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a3fa4518e3aead620ab34f2ce608148d9333f2bfb6d1b5c29c29e48a896d83. 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/DEPI82216002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887323672c94ce062ae743210baa2a89db39db3e1561f5e5366c1468e97f7792. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82216001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1b8a9b2c783c1099fd038e122b69d58f083ad2e775099e11803e6db1af219. 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/DEPI82215828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413e907ba770782b91f58d6f12923d00bec1fd20a72df5dd22e3c3a9e26d6d7. 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/DEPI82213341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413e907ba770782b91f58d6f12923d00bec1fd20a72df5dd22e3c3a9e26d6d7. 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/DEPI82213341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1b8a9b2c783c1099fd038e122b69d58f083ad2e775099e11803e6db1af219. 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/DEPI82215828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887323672c94ce062ae743210baa2a89db39db3e1561f5e5366c1468e97f7792. 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/DEPI82216001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a3fa4518e3aead620ab34f2ce608148d9333f2bfb6d1b5c29c29e48a896d83. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEPI82216002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a497b48bf44b2994525d5b42a5a62bb0c54818c23adfc478b7daede22dec0cf. 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/DEPI82216003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a8719c0c9f4f7158e8ed39420d939830e5672f7fad25e61683d07e1d23d884. 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/DEPI82216004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed9ac9876ecbd19c998fdfd88f6981a3989af1ad2f43861ac3c80a4dba5126e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEPI82216005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6167ec52b9cf05ed636aad2dd4d57e2c7dabede30c85bd733f6d6f6c70c0b4. 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/DEPI82216006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf422383fabb73327e56ecd292b6027b7a11f24aefa76c01cfd540939bde860. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEPI82216008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf46c47d0033ce520bfb2251f25fa58714d127df630c6d453ab743139a40db53. 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/DEPI82216009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413e907ba770782b91f58d6f12923d00bec1fd20a72df5dd22e3c3a9e26d6d7. 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/DEPI82213341.