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 0x6a608b67865d3bc2819236632f163fac8fe0cd3dfe27e2dedf9708a47d973291. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad8466ea-2738-4735-821a-326b146eed33.json and https://artists.proofprofile.net/proofs/artist/ad8466ea-2738-4735-821a-326b146eed33.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 0xa576fbb9bfb801a9d61c6ee2359b8394cee7ed4543604718fa3af392e3957dfa. 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/QZK6Q2414460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993adef6997e4e2db68eb8f8413277e8684292691f426b4d731c686694e218c2. 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/QZES52475337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101825bc9b256fa05aa361296006efe67f8aa62a85f0b679e461f4bd0b233598. 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/QZTBF2326620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aa685a0981465356c1f01743774e64221faf10411da6633c92fbb911d6a1f5. 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/QZNWU2331386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e9c97d811334474190119b46933d2fa39bdc9228694658ebe84f72e9a8239. 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/QZHNB2365947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298db1e126457ea0112f6f9bb5f7a4e7c1296efb1630811037c4526506749bb1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52276418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa5913953daedfcd0bbb0da6aaa08e5364a9ee4ebba8efae5e43efba12edab. 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/QZRP52277241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c76fd62df6db69012af825108ad748ae7d4fc5c372a800708e997bd7cafa8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6L2289023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5a1722aec623a5f0e6a04691db07347482029caabe2143a7be404de7c5e471. 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/QZNWZ2167186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e253a0692b8ff4589a86f8bb7d493d67d059620f24a2ce20684968642160c94. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA72143280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc65da0f7cbcc89dd0a34664381d9866d4018bab03b1744bbfd41ae7210b8de7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWR2089001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc6a408f734799f7c2b1853bea30650de0b2c3f61e6960bd2aa7c6045efd36d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ7D51701646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30b7bea60e5efc74325a9a7039918a65ca9f475f272895c2768bf096d72b89. 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/QZHN52029315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e43c244d0315a48ce71079cc57b0f169f39b947c234063042c4c6ddeebd939. 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/QZHN52029317.