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 0x97fcbc87ef11c23dc3ad8788b5eff7613d4e9089d75ae90f1e2a5edb6c2e254d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4936fe1a-5eef-4f4e-9423-bd742b2bc385.json and https://artists.proofprofile.net/proofs/artist/4936fe1a-5eef-4f4e-9423-bd742b2bc385.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 0x673dadb538c0d0bbe9a581801d69a867f0866a0b2d078fb265084e7c3c02f54d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TLVEM2424601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abbce74dda20e29e47651e7943ec5141613e477de9a2ea9313e62b6f8626230. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPEW2463946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0e0f3b73f3fae54885c5bab8637bc2c5a9cc28a581f466209c65b61ea62290. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TLVEM2424603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae80571f4dab3cdafbc8451b464b259cb7c4b3167d5399b2c98356941266ae43. 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/TLVEM2424604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5696ba7880bf13e9f7f5811ce7784a8ac34b05422541a86e98056095d4053a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TLVEM2424605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116cfab723dd7b761aa4e4e23b0fa1437af0f7be89c54b582cfa901ae79b3fa. 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/TCAEJ1909587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f24b46539c3108a227a1a486d34dbbef629327cf66d41d093fb21bb81fb880. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1195346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec80968490c703ffb4056cfa82b6c6e6a2ac4e896dae9ba0a4a002c828de5bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1195347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463367f2e97e01c08a8d12c5f6b1547e3051493c8584c2165cfd531dba40004c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1192928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abbce74dda20e29e47651e7943ec5141613e477de9a2ea9313e62b6f8626230. 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/QZPEW2463946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a6069a7578aed718cb9affaa50ebac5e1d3bb7ab860c4b6511f1100705795a. 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/QZVEM2388525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f879cf92ccea4ac6d1fc1cd17286d0c9f2e3b7041e640bf7c40e4dc3521f6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZN882298680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7423b4d630aebcca1049f08137af53e2ea4c75e76798beb41998ab1a509038f. 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/TLREW2203554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1089fcc2453b245071411652f1826c8264e258f6695ecb4be378a27f1dab191. 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/QZFZ22208383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb260a1f07288bd2a617feee4a7a87d5351bb20cee63d49315a235d807a63cdac. 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/USUM72102106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bda2671c5fb6f2a9a5f4e3440aec6734eaefd5bc68c40d6fc1bc19a933694a. 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/TCAEW2018064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f6eb45de2e4ab7e5ffffb12a1697b268b249532065359cb0ee6e33f31e53ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAES2076909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85c12fea4227a54b290fa792c081a2ab81b40bf5b9a471585563848a658a8e. 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/TCAER2044407.