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 0x7ba69dc0ab3d1f0f77fb42478d13dba3ec0a5604fa8325ab70355012d593a416. 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/adf8b64b-2ecb-41bd-a5b0-19607cff2f3f.json and https://artists.proofprofile.net/proofs/artist/adf8b64b-2ecb-41bd-a5b0-19607cff2f3f.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 0x8d092dc51a2e617bf12b44bc883330b863680c404d213ce8ac5e661c68423854. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA71979165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1a683eb7bc4fd204bde3fb12b93b911c0d25ebf7f7e48e2ffd52b66cc7820. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZKAK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3ecd75cfcd44775f778faa05b698accc494f39ca73b09190ca6655ff194b89. 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/QZFYY2125243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb962e9c95625b00933fd21573e776fc69b1dfcdae6ad88c0760902469bc2d7a0. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZDA82150368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0110d9a995a2ceceaf0254e284a00c11a70a3252f4f67ddbd409a03a14f981. 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/QZDA42237288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b754bc9379755d919954bcee0e7595480a13dbb53f2a221c2338a01519a476. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZKAK2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd4d47c365524c258019730025f020c846b9d4e2c448fb2b335a15b9aab555. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLR2141507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1a683eb7bc4fd204bde3fb12b93b911c0d25ebf7f7e48e2ffd52b66cc7820. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:23Z), 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/QZKAK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe924e452a54438a5dc74d98836c94af02bb5c88314e1febcff0b2d761d3b2dca. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZPLR2141509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439a4ce9b4264b260eb4fc39314f71fce913aa289c4db6862104560e9362f402. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZPLR2141511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c8e7d9f9c8ddf94c317b71a4f2ac0d3cf5181541d832ed0ba70ccbe474f153. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPLR2141512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964c0789814dbf4b37e89129d502227d90a3e094222ae8d283d98ebb288c9b39. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZFYX2496042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522fc23977d1d611d01d03fd895e715afaa083cff2920ea928ea9bf1744e467. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYY2435018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee31b6458535a503de29e4fb85ef17f1f0909cf4d0748795ef1a6418f0308e5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYY2437251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8826e5c07b990272583d393b90097d10501c654669e2017066928f7024be8dd. 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/QZFZ22420881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888f8f6488c83fe959342cae51df4b0405b7d88c3fec13a6a9f7db9e3a0ab4af. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZES52457719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350a7e9f84913b27f5f41af6b5411670d768a418b19e65527827d44128fdb0f6. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZKAK2100017.