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 0xfcd66dadc6fa7d8bd4e5164c4d3e6e33de1cfc4162507a37b108b0102092daa2. 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/40b87a37-daba-4df6-81c6-f636f6190961.json and https://artists.proofprofile.net/proofs/artist/40b87a37-daba-4df6-81c6-f636f6190961.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 0x47893da4175de55df028a060ec9c9ce4166510246ea8eaa6818b761878409e1e. 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/UK8E21960801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a32b0c4e94f68b48ff9c0fc4aea09bf5242b21113caf91167ff789857ebb4d. 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/UK8E21960802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342fd20cd278487700165703219e3a59697d480d9011ca13b3f89b32f55ca259. 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/UK8E21960803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f43af454ca592af8cc86b520395deecd8342503fdd7d1bac5543ce1586c8c. 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/UK8E21960804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c6acca02a91fa5fdbc64e61d0bbc8e2ba538afe5b44aa1112141cb3e0cbe09. 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/UK8E21960201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d263abb5c11072b98cdafa27a26f710265d3af7d5f7e002bc122cb19dd828. 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/UK8E21960202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6267ad62b7cb32b23312570c66fef3fdf1617bd7ff5df6cff090c444c4680f8. 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/UK8E21960203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd4c1afe46db513b4342c3e6705c6e3ae6735e727e5d810d66b6e4a60b17448. 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/UK8E21940402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbe915b789080cfc34ca44f63245a5d49455e777d971621f5ec820e21e2eae2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK8E21940403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbe915b789080cfc34ca44f63245a5d49455e777d971621f5ec820e21e2eae2. 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/UK8E21940403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b9edbfc13197a7b830769b602219e60f9183e142eb368b91b5ba56b8f11f49. 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/UK8E21930001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe333f1681f636a59a2c7c07a39aa57988428c3212518742b6c1fa23bc8b04aa. 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/UK8E21930002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3309775a9b0ac1de21d6959f5882a9b560b6cb14de9a86a1c2c07f958449ba1. 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/UK8E21909901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8cdd4b83fdad1661c5dfe0937c909ade42372dda33a04bad1d1be3d998824e. 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/UK8E21909801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8cdd4b83fdad1661c5dfe0937c909ade42372dda33a04bad1d1be3d998824e. 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/UK8E21909801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3309775a9b0ac1de21d6959f5882a9b560b6cb14de9a86a1c2c07f958449ba1. 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/UK8E21909901.