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 0xb8acd1d305b2bc420373eca13722c30a26d51743f4dd357f17c5e9622750f03e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90f7a1ee-9338-4e50-bb10-29e4aa8b2e45.json and https://artists.proofprofile.net/proofs/artist/90f7a1ee-9338-4e50-bb10-29e4aa8b2e45.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 0xabe607f8950ad84358bf7b381a9c09a3de96194bd98ba63ab87777ada468d81b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2238185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f8be2401161b918fc77679d632a2b73feec3118910910876899a892d2d460b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:27Z), 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/USANG2283035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf68537bdc6ad07f7ae00d9aec37175fe1c12529893f66764e43c2f38ef79e47. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USANG2281955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b213d52b7d32030737d1e3772f7f1222fb4242332727e5831062421d2434d4f. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QM3DF2260949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad64d1bab97abf1a5103090eb9401362a4f6629b8139c9bff76ffd2dbc1d52. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2248066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1381469d41f23b23e0b7366f3ca34732a13c543de7ac8cf7c515b4a64c45c4f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2271162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49e87192447d5a6250bbc74836a23ca2392fe55e92d182fafe80b19dec45a6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QMANG2223422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae58936dce2843e200646906084f6f733eac1faf255d79b8651ffadedd26087. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMANG2245802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5147efba77d71e94e39a0a51ef48435b98411b937cb7c5642863b13a7db001dc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USANG2445101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf53e1b9291f7987cb5f71008ca65e99884a8508b6bca0261becf6a81ea05e3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMANG2424496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf260fa9191a9b138e8b719514161a32cf50767f17456df36fea09e9a3c50be01. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2407819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ef95fffb4e5039839dbb14f6b7f2387895abcb6089346ffcd329cfb16d17cf. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:59Z), 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/US3DF2417904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2268a1a91493512651bff232ef18262cd9d141714b119da77012cec3dd5c63b5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF2441616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420a4ed55cd9272a8a2670b5b74abe92f1617fdf4d8d7a3fee06b97b0dc0d0e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2474563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8525dd67f4f16078af35a4c83cca9833ff3801da0aa9868fd1c12eeed88a684. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USANG2407475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bda7fb9dcb8abf992fff3a14f2893edda59aa26dfe5bc0c5d8dc55173a694a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:50:59Z), 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/USANG2407515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b620c74767d238b11cd57d0e38285db1bf487b170aa1c4f3aed45ad9d8ec79b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USANG2451405.