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 0x6a16423b91b4f9dc0e6606a2e48bb196c05f73d9122048c45267fc9d79768d21. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f315071-9cdc-4929-be8d-ce9c1545dbdf.json and https://artists.proofprofile.net/proofs/artist/3f315071-9cdc-4929-be8d-ce9c1545dbdf.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 0xc86a7194b8d5c2310654a27ec4495257d0abe603ffd71e41c33c34f5610a7739. 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/BX7ZA2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89af78b16306aab6696ea19af3143c7daf508e5ba17de7f2fc5924a9b2959d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX7ZA2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cc405bee962b75aa0549fb6e5a828c88aa79158249b8b1ac15fc71d43897e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX7ZA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e8c4ff8e07d9a42a0778dfbc5443cf765a86eedc98ad42c5d4c905ba86320. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX7ZA2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942b5d25b7dd57ec7b0f0fa7698662351802395192cf52f447362e501ad70795. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX7ZA2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22f6d750ad97125a63cb404f44cd344864a63383621f268e7430a2a1ccd6edd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX7ZA2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cc405bee962b75aa0549fb6e5a828c88aa79158249b8b1ac15fc71d43897e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX7ZA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89af78b16306aab6696ea19af3143c7daf508e5ba17de7f2fc5924a9b2959d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX7ZA2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d683c7d16f8a0f98c172787e72dd08b2a30d49f3aca7c6157612e72f1cab0e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX7ZA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddc4275d4e466d9cf904ea3b99d3ae65db00d70b665997c307aa465455c308a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWDE2237808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd529b798b68876c01952e148466fe93a31b364d4ddc9641d95d7754a582135. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX7ZA2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0289a1b01aeeb4624c1fa83555b0bfaf05da0e3880d5cc4b626ac9b82ae37557. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX7ZA2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d94387c1794ff5adfa1be812e3188413110ba408bd5401848a8d1b8f38e4b5e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXSSW2300844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54932894661c507d2bddabb85b34d77d287e33410e8950914fd286413832e923. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXSSW2300847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e90cad2c5e2fc0bd61fe89da0785c89d8556aef684a31a26d9f74b6618bdb70. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BXSSW2300845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71df0979d2b07118eebc98beb2641ea880dcf5c7999a0e9a53b83704bb5ae7d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BXSSW2300846.