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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001803b877103eebb4e7fc00deb0c996ec89fdd76deec7ac08355d12b8eecade. 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/dfdf67fa-bdb8-44cb-9899-0aa756e98a2b.json and https://artists.proofprofile.net/proofs/artist/dfdf67fa-bdb8-44cb-9899-0aa756e98a2b.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695686be8cc5b29f6e01d438843587b62639cb8d3a747945ebc03399b7c6f611. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9L2420157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dce898cbe2e6ad165d2cd5e0baae035c744e898897e320eaf36740bfdd42906. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GBRKQ2309839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ee1060fb60f4e6443f930668ce183af6ad970e33f145b7ff4bf35e9ec38d30. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBRKQ2309859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd044e1f17f62b298a4a944b457679fd87902975864204ce71bfca3d91cfd52. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBRKQ2309922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1fbb6a26c7af826d5f711a01ff11c4cb82a4fc66362c0426e6b485acdd09f3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBRKQ2310067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dee7f119cf41b1e1c4427181576b332115add4a85c47962112aacb7f60d4152. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBRKQ2309876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ca61d46b83dc33928e1a1f98e6135cee5a75dcc5605d68c3ec99129533a70f. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZW9L2420083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd012e7ee71f4db9859cd8af4873a716357e5c01ef050314acd0c561ca05b85a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9L2420180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db0a3e93c9df31cddfcaac2303e559756b36eff9bdb8f3c1c6d375eda68fcd6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBRKQ2309871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b90fad97afd31936f805b8bb2ec17b76633a461f4d3cd717cd1a39681dbd8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBRKQ2309864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97438750354ffb75ffb9ae8bbdb1cc1832063ce3775b284e071f8099547b705f. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/GBRKQ2309992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eed934087ebbb1eaf6d8285bb37c402c45a1962b1b1fd5a02afc189b60ede25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBRKQ2309846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f6a5f6666e38e6d936d19017082bc328e8657c8d4ca8ac3fb6d203d8310213. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9L2420161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd2c30deba83b307904b36faa3b8fc8be0b6faabed60469b1450239844802d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZW9L2420070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe73b426b673f9166feb56edbd277d28c804208f76eb09c6afe4718b2c9aa2c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBRKQ2309842.
homenaje a los grandes /Vamonos Vidita Mia / Lagrimas de Amor / Triste Final de un Amor / la Herencia del Canoero / Mi Lamento / Romance Apureño / Como la Madre No Hay / la Muerte del Canoero / Lamen