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 0x7261c497c9791a68a9f0460ae5fa033217283b2a9e25dd3facd8aadc4865a62f. 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/219c47f3-7566-475f-b3f7-7f020d811ca9.json and https://artists.proofprofile.net/proofs/artist/219c47f3-7566-475f-b3f7-7f020d811ca9.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 0x99d32596e5ba8b777f68aca33394633a43a287a006042ec0d99f3c45cd5057e6. 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/QZVEM2539312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25626b07d0587087b1a11982553e5fb74804528e32b9609b31d4216c3ce4ebe0. 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/TLVEM2436358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ccfeadae6a682a291a8b6d7e3849dcdaed354ea54de7d0c92bab9790384e85. 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/TLVEM2436359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae586e9f095e306fb03e5fd0d5409405ac6c6b722464ca5e374da56efdfde51. 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/TLVEM2436360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec8386a6d794fbdaeb9e0833df8fd8c5422fa2f8d022d20b4471339cda6623. 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/TLVEM2436361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d5c5cdfeea10b6d2951b56f5ed475a3d99cc1bcc71c7b3ccca2c5c4b998a29. 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/TLVEM2436362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fc7a66660f31338f37d81671f7d56ccb3cb9ff633cba64237522859c78db79. 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/TLVEM2436363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d94c2bbedcd97354e18055f29a4dac4ed38a8579aab20bb0e381ecf1b0ae959. 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/TLVEM2436364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0a851614415da04d2ccef9ece3ba705c9845f5bba75de1ac86be32ea38beda. 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/TLVEM2436365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1857453c1303ad3eaf055fdb629ac245869cb19c2595f760e91be1cbb1c6fa7. 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/TLVEM2436366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da9280db705562aaf4f9bc86e7eef8a585c7f0c78168d1070bd8ca7bae2282a. 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/TLVEM2436367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fce5c3eca93d968d84eb2716c3a0da1416536c511d104f5b285411e5e9e892a. 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/TLVEM2436368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832da719bc2f2de97ab503996ea7151de7ca1f105b4340ddd8bea98c54e2da00. 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/TLVEM2436369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54592a34aca04a57aad452929904c477f8e644ac82cd3988e39192dbe3605439. 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/TLVEM2436370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8eac8a1966dbef34aa0f6f495f3552d0ad5236e604f0bea9a48c5e60a139d9. 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/TLVEM2436371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90987a2e5400d296c858d4189973a91c25b2d89add1dda2bfa879d74799a343. 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/TLVEM2436372.