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 0x30dba08fa9ee8703291a8ea39d509323a4703daa591c6a3e5b873e1c350767af. 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/b3fef607-87d1-4c59-ac68-2be071ae0cc2.json and https://artists.proofprofile.net/proofs/artist/b3fef607-87d1-4c59-ac68-2be071ae0cc2.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 0xf9fac19a1bf67589cf5f7f35ea519213447d73081205c3224364dee9acdc22fb. 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/GTA111900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f73a36c7e990056529a8f8fbcc95b0b9e47cc7f17a272d8613f74dcedf889b. 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/GTA111900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d9f63a97e4de95dcba1a299a153b4c334bebf450748227e41578bf3911d13. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GTA111900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b1409cb2e9dc6a5526201795aeced7d6fc47dcd5476b02b8f0aaf04c997bbc. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GTA111900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabed63fe5aa9624de8c80489f7f8069ac69f96e072cc2d80264c13af3586d309. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GTA111900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c3dbacf466f71e784e90906871fcc2d84e8c60b52225d55bba7f852f44858d. 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/GTA111900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86c6e4e054a243b694af7c1bbfdd25fe94944edd5fd8c9eec02795d89d40bb9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GTA111900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c82632e07e1d143439878dfcbda5b0ff9b6b989e426f9263aa3ae6f25e1e7c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GTA111900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4e59b9c8149c42cb474c152cd7e593d2d23e37b4ba405b729f6edb47c8a6a6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GTA111900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ced404ba2525ce60fa8502edb6e622932543caacb81a476a0961ec9ab269c9. 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/GTA111900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c9b9b47c647fed71dcab094a0fe8469d378664460c58e3a44b94c50e4360bd. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GTA111900053.