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 0xa28a6c4de7de88a79e9e6ada892c0d8ee1afda2b3ecd726bed41cb75016f9ce4. 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/da2e9e67-1ff8-4172-aaa3-5490e3ee1c38.json and https://artists.proofprofile.net/proofs/artist/da2e9e67-1ff8-4172-aaa3-5490e3ee1c38.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 0x0e83bea10a8a2bdbc605c1533cbabf6e5c91640663ea47d937cfcb7086cce356. 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/PL2DY2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dd50d133b0dc0ff21820efd9a159d21972360d4e07ce2c3f9d586084f05505. 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/PL2DY2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf651db98a6fcf819972e97dc0b3562f83928040ca9696d5703a0293dd88502b6. 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/PL2DY2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215692285d0bc0e1d68596bbee6d1ad67b1b3dcda4b1b4f40043e0fa5f5d3dcb. 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/PL2DY2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f6e137d0b18f3cc33b0b7358804c880f461b4dab10ba28349f2ae8efaa0b17. 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/PL2DY2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5c758c7d704ff55f55684f92eba12f56dd901542a7c0711c809ff47e743102. 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/PL2DY2302521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff09d461b85386be3860d9820007b0154ffc193c4766d094d2104a02a304514. 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/PL2DY2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e463d73587ae4b652b69177efe711fad3dee8fc9ee80f20d79b8621e8a47e59. 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/PL2DY2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe144dbb1f11478b41f3bba5bfda0556df2efd054c243368993e2e09f75a4499c. 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/PL2DY2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bf6cf81f90ede4256ba93b14958705b8a5754b288e8cb72c01a89cd9f38bb8. 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/PLUM72400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3767cb67dd39c5e3621c4abe53641eefb8d69930a796c9a306857497ace36c. 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/PL2DY2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09703c6b7cfaf3555fd889c8bfedf863525c62ec4315a17372dfa083215b59af. 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/PL2DY2302243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8f247f020e40ab3a0cde8f2c92ecaed5fffa795e4bb58a2319f41c6470d117. 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/PLUM72400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afe65be64a622763dadf44cfdeb075694b0fa2f8277d2b4fa39275ef7ef910d. 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/PL2DY2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a61f67cd381bfa18f12618cb496f1819b2c799db9093f9dc32afebd86ff1cc5. 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/PL2DY2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e74fe5ed480926398bd7e4978260356716733da6d4ebbdd8386eb89b08618d. 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/PL2DY2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601d56d82b04c0e67bd7077f2dae7d8b6d34c36b61c97051964efdead015964. 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/PL2DY2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb281ca00ae95dcff2f8362068b28eb3325afa97a896e3c3c2a1ad258a3fb4c6. 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/PL2DY2302685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4dae4fa06320843f5b0b1e1d16140740e24b85fe39705ce45759b4a04050f0. 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/PL2DY2400119.