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 0x1b5d9008fce4ec95dcf261086e477d052e38014648972b0e36829a45661a5e46. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/780ccdcb-9b26-4217-be2b-dc70ff445585.json and https://artists.proofprofile.net/proofs/artist/780ccdcb-9b26-4217-be2b-dc70ff445585.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 0xfa1e63ae3a417a5ea86b85773dace1d18cb25e144fa8ea34ecc42218a03fdacc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:08:33Z), 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/DGA092497108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7a1347c1006ecefbe2819c5168945842d11c96a0ee12800e229a95416c6e48. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:01:51Z), 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/DGA0L2466693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033ca9469bfdbc09244e84b7094d47f9c31b27b360ab6d24200279ef86afd56. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:54Z), 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/DGA0P2485819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768bc2bd550a037b178091e3e498a0c6ddd60db023ebd667b2451fb35622e868. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0P2485820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf73db196fb0a2ec93d45eeb1cf4e650b46da4e33615fc2694f1081ec82aba42. 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/DGA0T2440097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe4ee93199c4ee87d3b3bade1f307ed361bf493c63a2968b37e9e72021fb504. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/FR2X42504317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62da576bbf3a6761d0cabcd815d6feb7e1ca2ce25106fd96513cbb0aa61305f2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:56Z), 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/FR59R2550883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a680aeb7a63324abf7369c29ae76650d8ed61c5948346d8693a11553958e6b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FR96X2545479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5292ba3524fe935405b6c81d7ff54e94f2761fae9d13a10f4f5ebf8f1a9b5d4a. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FRX202599681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fab6b85434779820966bed44857909e37479f7366fbc62c629d7d4e6306cff5. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:28Z), 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/FRX282520318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48693facc9c21cae094a17f7173252e5b068b1c238750dfedb36ed91fff1e928. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX282571109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e6ec16e8a790f64a7cfcd1403a49299b224e1fb518f27f1c286c62f466e740. 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/FRX452548497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3212288385e1958f42a2b63d7278b25c4696462e7441cd6e90d35258b00f6be0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:06Z), 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/FRX872510678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bba1048014fa380a4509ea2881ddc14ed88e619913a0f76bd613d9d0c916d4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX872599353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5b81cac833e7812a66fbfdd8a770cf01987219dbf04a7dc6cac64de2ae974. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DGA052548999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eea7d89220f32e581eb5bf4ba25821a3edbf3febdb9e2b61cb6a0058f9f292a. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DGA052586459.