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 0xd4f7688cc1cefd2f587a8190dd159e14aef5d1c16e6db2a390fc9c585e5237d6. 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/13010ddb-9336-4712-bb46-4b2911c3b0e7.json and https://artists.proofprofile.net/proofs/artist/13010ddb-9336-4712-bb46-4b2911c3b0e7.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 0x8391393dce6a7ef3ad156618347a2fca10dedc20488c68d0ed8cc39ed386893b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/NL3JA2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e2e896bc171483d2863e0c74a31435ba4262cc56a8327b672bb8d81ddd74e2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:28Z), 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/NL3JA2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e9f2f69b5fbfb247c13ef904058df86ffbef2e0e0dfc2190e62828f5284e12. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/NL3JA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67036bef172dc035b8c48278f485c413d1facacb3e9586afa8e714a020bfbe8. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:18:29Z), 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/NL3JA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50989dc6a6e09503bc03c3b9d2c03946f6ee15ac1948094fb2f533565130fc9. 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/TLREW2222013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8907e352399ce212044dcf48dc2756ebfdf3df5229bbfe48fbdb42ae19d22da. 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/TLREW2222014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8140e63c28d02da1bb869d3ec51b5f90d52fe348d66860091851dcd9286cb552. 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/TLREW2222015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dafa38d1abe101fb980ea13cd85334601536eb11f13a272b1550fc4f62f0373. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TLREW2222016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec26d28acb5cdc49dea7f46c384a609e71dd3422e06baa3babacfcd478275d45. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TLREW2222017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e64da1c4eb884c88ad63452fdf7dcb20f024e277167cae5c3e047e94c44273. 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/TLREW2222018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8e51b815a3ab1a38b07226070945b453336ef9b17583862449af51e6ec141c. 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/TLREW2222019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a56436fdac32b18b80c35285e4ff5e890f2b5deaeca188e37fdf8970d06d65. 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/TLREW2222020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431d30316b3aff5fdfea687b1356cc499825254dd7647353a9db170be5057ff4. 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/TLREW2222021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea646d46c7cfdcf51e97a78f12ca257d9cc03932c2e267a08df9b355f6e7a26b. 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/TLREW2222022.