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 0xa6a79d0a4834930283b46fc20bc7cc022a7936ad676a47325958e737b0d8c1d8. 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/fca843d7-e3ea-463f-9dd9-8c8925edf5d9.json and https://artists.proofprofile.net/proofs/artist/fca843d7-e3ea-463f-9dd9-8c8925edf5d9.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 0xe9f59be4d652f92295e5828c131cd0d32eda2ec087cc5bcbc9ae7f934d393333. 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/QZWDE2489713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f8d8925c18a94fa8081ddde342e739466eba58cbc9668445ef97f5bd03899b. 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/BXW6U2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f3347f5f4d1b6ad49c1cb258ec30f1c77c78173ed17826b5279b9291f27af1. 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/BXW6U2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfe25b3593b3fa7ea8cf01e4cde15a42bbe86e3252ddab925029e12e2c9c683. 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/BXW6U2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84f3d243d65a6d84d23b4faa613d56a5149374a1f8124a4c9f477c89e0fb1c1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXW6U2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f506af7bcd2982d228f340925c1974c65566b516efe74f2dac185b51c08963b. 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/BXW6U2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d1a7ccd0c6168702949f6b6d871fd8e7c3ff7014e1f04a5df8f2757f94e55. 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/BXW6U2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada6bce58575535097ac9f495b7144bc98c97f45428789c7454dc50373c4172f. 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/BXW6U2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f3408d973d45f2e8d48181c83d37939a0bb937d486ff873c130d0adb836865. 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/BXW6U2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b6e6cf771e7845234cfdbf9d68679457548ab1b995a949146091a92d39447. 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/BXW6U2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56cd30dc4a06ac88d6b32e50c1181de48231ce7da2d109ed8ce33483a399b54. 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/BXW6U2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81b3330360d1ef642f26d7fb976d81b63ba184fdab67c5efab66b0aabe3fa19. 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/QZGLS2070484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ae254f537a6e1d4b21899a39513651b3ec4a2c2233b9169fe5f809e83108b7. 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/QZHZ41970534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7c0b32071bc3d1e6bd2bb0a7c6f49c80046a080bde996f1eecea5c4ee9730e. 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/BXW6U1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ba0b76f366080ff5fc3f3d3e1bf553090124f39786b36d72fdb198b6cb0ad6. 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/BXW6U2500001.