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 0xf3f61a500cb452b281ea10ae4ab6a6ffe321daed18c509ff6e287b84329732d1. 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/1f898908-5b2e-4ada-8171-635b8d8b9779.json and https://artists.proofprofile.net/proofs/artist/1f898908-5b2e-4ada-8171-635b8d8b9779.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 0xebb6ff4c8c2e594d8181bdbc368959911462e47c092378a674278e1598c3cd90. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX202485008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc8fbc3fab22c072151dccb161add63f24349ce16117b963856b977a5dc187. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEYZ62400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be0b9b74e65871162e298b7167bef6921d3091c838b77627c8d7b937d3ee190. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:18:23Z), 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/UKU932423866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed2862b2849423d032cc8e061efa574ac0036c8419321884ba3b807ea527e1e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NLE712400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b91c55889347a7cb4585d239fb5527482225d66c1b89549f9074bb88d6549a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5752459099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437ba215200aba3d0c6c1d2f49f071847d2ff01327a790480e75ffe59706c06e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKQU2449314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1012e3740d10196d0510cad6c42bb410d3bc2c591dd657e5361784c4022b029a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ES5052400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa437afc3e8ae0e0de20e36570ba3270d5df5440f2082fae6b397327f0452521d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2453593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab93ed16b5ce1fb3f2403d676f3f3e79795555ec59b4f2fa13f4ca959202c29. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPX2361657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0681af48ce3575ac66b93668db245cb1ff115b758cfab21038fa6780ac178c. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:42Z), 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/QMDA62464889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faa3f5170c920a66c54babf599e38a8b0e6f53fe562aa961964d04e4effdb6a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZEB2416900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f019b35b1cf702e1b5cf1d60eeb8352cb2a182438e178f1308fb208dc48f769. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKQU2500830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234e1cc7f92a69042eb5b41684521d15c03e26fd3edcbc083e8cbc2d21fa5a5e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEAR42596297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eeba58461c8e801791e73d2061d0fe201cdc9c358385e4236367482bd61432. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTRX2567638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dee909f1de426017da8da540d72efa59355cfec69bd6290ab0ec5681e5c5ad. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NL8RL2539997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0fc87d5bbf6cf5b4a74341eb43391fc1299b9ddc0e3b3a1d739a606579273d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:38:50Z), 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/NLE712500692.