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 0xa7365951eb19187b07575e76250a0d61147dfd618099d84ba881e90689594353. 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/35349e86-d509-4fdd-9968-bb624c36d6f9.json and https://artists.proofprofile.net/proofs/artist/35349e86-d509-4fdd-9968-bb624c36d6f9.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 0x1c9f02949d34bca8e46679e6b06656561ffed5a6bfd891bd9dca5313c18765d3. 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/UK8XM2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e527bdb86ad6a8ed7c4f6f708a6db1f7bae19057360f5f5c49eb41938bd7288. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK8XM2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bdb8df92ee50cd979fea6da6b0bac7d31efbbbf2236361b9a9167d681daf96. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/UK8XM2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb7d6339011e4d53dab71d9896442ffbc7eb1d52ac1db8177a33b4837dc35ec. 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/UK8XM2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9f02949d34bca8e46679e6b06656561ffed5a6bfd891bd9dca5313c18765d3. 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/UK8XM2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1193b966df482334a4d8c2434bd971745777887ad2e4a95a32a09c47a309ba15. 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/GBARL1702238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e527bdb86ad6a8ed7c4f6f708a6db1f7bae19057360f5f5c49eb41938bd7288. 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/UK8XM2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bdb8df92ee50cd979fea6da6b0bac7d31efbbbf2236361b9a9167d681daf96. 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/UK8XM2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433d35c1429f2b359034eef5b6bb57e1e75ab3945a3983e9e89712cffe8abf40. 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/UK8XM2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c53eb8ba0f486a05fa85bfcd34f866b676ca9594e248bf94da3b97518e94e. 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/UK8XM2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60683025ffaab3551e36d3a3a16d808692731873f54e89a135b0943d79a26359. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA052395595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519353d835e422fcc647c7a3ea443797401b6705e502a43ca5afd6b754ba91a2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DGA0Q2385729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60683025ffaab3551e36d3a3a16d808692731873f54e89a135b0943d79a26359. 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/DGA052395595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6cd4ae6f8ff72cee75fa7070209c7b61f2fd5cbcdc84a5accfa046e094aacb. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/FRX282426888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7210fc65bb9c3a00376791817600dde2b437816f6eaeecd1294f85963b559ca6. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DGA092365292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852d0119675e99c5e8905f5f4b0cc4cf3f56e7b6f62f6533f458aaf4342a8c67. 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/GBMVH2300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d1a91a89ecee0f021977ec2f5e97d3b7f4c13aeffe7b47aec54b5561f65ed. 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/GBEXH2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852d0119675e99c5e8905f5f4b0cc4cf3f56e7b6f62f6533f458aaf4342a8c67. 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/GBMVH2300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d9195767348fccab91a585f9a50e7b629eee8d0a4e480ef21480d58927f66. 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/GBMVH2300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45999bd19defa5cb0a7991a581abab81920559239e33811cf1947956d2987d4. 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/GBUM71805110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d1a91a89ecee0f021977ec2f5e97d3b7f4c13aeffe7b47aec54b5561f65ed. 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/GBEXH2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b0408916ba4af58b668ce76299f5a4d1e67ffcb77d1d1d5ab59a59e3284629. 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/GBMVH2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b0408916ba4af58b668ce76299f5a4d1e67ffcb77d1d1d5ab59a59e3284629. 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/GBMVH2400230.