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 0xf77be2aa4a13b44a161800692674e944e18db36fb5cfe459720f3f2ae4d089a1. 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/bb942cc4-cd67-4e59-b426-098c0fcb44a0.json and https://artists.proofprofile.net/proofs/artist/bb942cc4-cd67-4e59-b426-098c0fcb44a0.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 0x444ba6c492c68537a0fdcd7f77c8c2c3ec5ae3a49d58ebfcb15980a79055612f. 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/USLZJ2293093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b6bf4c8ffaf817b39796c21652e50717c8bc3b07e4e0cc27c5bff68249816. 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/USLZJ2287173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bf3869b9438297682e26a37b9f6fae611fd1e8bb2975d52f80c97a57edc634. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CH7811105815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7118c0db96a4a11d17c77c58ae82b784c025e94e31ad09ade2ed0abaff14b8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USLZJ2289237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b6bf4c8ffaf817b39796c21652e50717c8bc3b07e4e0cc27c5bff68249816. 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/USLZJ2287173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bf3869b9438297682e26a37b9f6fae611fd1e8bb2975d52f80c97a57edc634. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH7811105815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515090935c9daae63edcb072ca20ec5b014962cc8dafbe6073979e340b88a724. 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/GBRKQ2338277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b6bf4c8ffaf817b39796c21652e50717c8bc3b07e4e0cc27c5bff68249816. 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/USLZJ2287173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a0bf97563d835b3687ce6ddea242b8368956aff0a8fcf23490a0ad124aedd7. 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/GBRKQ2338284.
The House That Bradley Built (Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba2d5da921729c34f4773454d254e6d44346726b5f0cf9621d1854dcd62d2bf. 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/QMBZ92041570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99c37cde38dd1571155a28b847007d406c42130383e23e91e3df1c6a10d2615. 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/QZ2J41600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48e94733ecf197b9ac063e04d12c22d57c14817493ba2aeeec3c75d6f182f2b. 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/QZ2J41600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd743e4eb93f9080a21d35deadb461b94f578bc002aef3aa8fdaae0f446445634. 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/QZ2J41600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81be271bddfceae1194d51442d192a2c93e95e2e63ae812ef64b619b4ebce59e. 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/QZ2J41600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9178321c26ef8e195dd96008144be6d31e7c2e2b32a31056486d9e372f2c155. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZ2J41600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5e85fb731577aedc55afdfb154c007770043be14b095527fdfdc6ada08a41e. 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/QZ2J41600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c0ca910c653047f52dc1cd8b2e8aac489911614eb2983636cdbd7cb4d89df. 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/QZ2J41600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e1d071da60c1cde75ad89de1f4722618b27669e103484ebd92b5fa99f301a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZ2J41600108.