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 0x57be6d48a558ec4f28e9112e0cfa7579e9cf5dadd3e05930cdeb2d97371b6ac6. 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/94288fd3-bc8c-449c-a58b-5e2c63128423.json and https://artists.proofprofile.net/proofs/artist/94288fd3-bc8c-449c-a58b-5e2c63128423.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 0x55e9d9a17780ce8cebf7b843c3d2d5ff0859807a37304f12f999939a526deee7. 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/QZUFN2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dc4c2a984ccdd9f1be639166a16a6ec7441369c3e4a2e84a24da67ecf76a09. 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/QZUFN2200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77d0c511c5cb70d6892eff04b7019f16fefcedee9f0737d6a07f6d53b53bae8. 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/QZUFN2200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c32a6e55b428f24380a6e1617d477190dd5538821ff6c537422218541ac010. 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/QZUFN2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1ec16a209a55f21041df9334d55b31d092a2de2bd06de7527919df5d89ada2. 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/QZUFN2200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47f031d07b41e3aa17550b66d7c44e0b00749a48595d9076d97e87665fb28f. 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/QZUFN2200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafbfcedb0805898a39fa150d4c8ceb67decbf1f48b5969c1e90ebb27a6c5003. 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/FRIDO2111785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5238053f42d56e888ba2c9980331101f0d23e76f174c5291360be137d3649ba4. 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/FRIDO2111782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb66efcd46a98bca4f97b68da8b4705e2c866934f354b49d493515a7b9f357. 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/FRIDO2111781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799a9e1362ab68aa261bbfbb3525e3ec89ac21d1641dafb51d13dc1f06cc1d08. 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/FRIDO2111791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfeeec7c2e4987ed87749602f781caa80649397b3e8def1f1ba8000a5ff83f5. 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/FRIDO2111792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce66518d932061d791615cce5c6b03755016bfaf303a8a2125c3c68b64951fc. 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/FRIDO2111793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12bfd80c6c1167059177dee5e1c8f7f2da3dbb2050003138d57d98b3f5bd012. 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/QZNWX2464455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22dc922064d3f8dec7688a5e7167d69b4a523051cb8f81869304a5b119cb9f7. 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/PYB552100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d7f94e4761b801b6b43aa36f374e634962c85f54b8985f62580664c59079e5. 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/PYB552100002.