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 0xbe288fb13b525daeabacaa453a2b7943e0df090b8b3b54b63655e18bf8c61612. 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/48e7358c-5114-4cf8-a999-cc2765a95a5f.json and https://artists.proofprofile.net/proofs/artist/48e7358c-5114-4cf8-a999-cc2765a95a5f.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 0xf67ca8253e229d1666a3969506be79f1bbff6909b86bdb82613dbc0f1b7f2d5d. 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/QZHN42054997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3636bfd931461f23c96f042758acbef31ad082cfd5c1c768ffc3de4abd69dbe. 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/QZDA62112030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bb13a5fc86bf019eca6effd7db8ae34381d7f8064567cdc63f76897c400457. 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/QZFZ32041235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ce3caa10b2b94291c221d12605295a8fc5cbdb7c7e4e8682cf33064ae2d5a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62112031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6633e5bc37d4ce57db20a7ce5f5f3ada4d62b5f1fda3e712b1558020865bd. 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/QZDA62112032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8c2dad7ca34961199f8fcca5f21fb7948f17034ad0c173f6439cfdbf62909d. 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/QZDA62112033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62bb85d8958c69327ba6ae38a97266826cb5a3c541c06e12436d7b7bc9d91cc. 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/QZDA62112034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20311e6396c77e90269aba245a4c6f70a38298d0a2263ed1c5f6df45a54b0dc7. 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/QZDA62112035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28afdbb670ea0a931b652e5b86271148b585dfc7378e0cfa9904f6eb228736be. 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/QZK6N2058283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ad21754fdad7616ffe5bdc6569c403b493b3251a72d972ea56ff82da661f58. 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/QZDA62112036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e461ca014a292f157ebfa5785d9b556512c8cfd6c076a27e5991fe167b62db. 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/QZDA62112037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb3fe18f1455d1860eabd052d6bcb0927c1bf282be4359be9a25b7c895967e3. 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/USHM91669244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9d9a330e018b65033315482a2ea2d5c4d35c2d46f5a6b58d7f67392144dbe5. 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/USHM91669245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f0f61969dfec24513973b64beba965029e2c151dd34da464500087e1457613. 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/USHM91669246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8243d5993f16b8719a622e78be46abef1f10453114956098cafcd3f6b21350d2. 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/USHM91669247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe8a6c161a0e7436ba955bba533b754aa2b5ac4580b61d7ccc48418e78be94d. 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/USHM91669248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b8891c86cfe60a4e1ce8c58c0c0b8067af2d20fbf3a387648ba9bca73d9143. 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/USHM91669249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e530bbb7b66566bc479195491411e876fd34d91ca25d562871b81493259e1d2. 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/USHM91669250.