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 0x793071da72acce33e9afd620f8fe59971b08cf2c73daa9c9bfbe4eddb64a6288. 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/8adc5243-00ee-4325-aca7-f201acc15327.json and https://artists.proofprofile.net/proofs/artist/8adc5243-00ee-4325-aca7-f201acc15327.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 0x83dfbe3798f2c26cfe10e88eee4be047b5c5501c4caefc6529aa1cd264d81490. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BXK2D2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe07607f6e709e3b5bf7b69bb62fd6aea2293e1577b2f067a8453ed18f9437e7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BXK2D2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c34861d3442701e66932b4ecd29290eb85d34f3005cbbbe15d23778da387ed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXK2D2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e089206517d6e0a1a44a29034501d0132c8f767b6dff4302d0b58136a6f9e5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BXK2D2200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251a2d649e125f605587e8fdb9ef00728727def402b82c802cb92270117d52c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXK2D2200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfd6796b6d18a05550a095765cfd4d4c026664bba62f5dcf82e86bb289bbce5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRD1E2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45113bc4e1e20b288c27c6c829625fc2482464072b7b09c666f7eda0605f04d. 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/BRD1E2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9934d1fdace18e6639746bf190b05f9d6b64c5fa2cb777e109f9b1baca54c4fc. 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/BRD1E2200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b502969caff02983101434d72b7229b1fde78aa9d794837f68ecb999d80249. 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/BRD1E2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06ee101b5315a7f96e1bd7083ac49a571eb5f748c811336a31a7afe5bb138ba. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BXK2D2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c0da61662bf3c67494e96fa364a5bd38054f7b7f6461fe05bb900a11d8a7e2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BXK2D2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4bd0756947e5b2d711e9ebd0ef41ee0df0d8f3f079785337b1d2e8979b0e06. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/BXK2D2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e14e5a1d7e4a28392ed531ab6702743a0f6e76f35c4f56cf565ec531dfdcfb. 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/BXK2D2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828bfdfd33238248f7fe1a9b6f1c39a515d33e65180e2d0a85ff993aeb02cfe2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BXK2D2500004.