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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d18940ddf09095e693c5be4fad1624392ce2ed7baa9f03277ff51b6a3047667. 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/65b41568-f43e-452c-b74b-e49b9f71d9c1.json and https://artists.proofprofile.net/proofs/artist/65b41568-f43e-452c-b74b-e49b9f71d9c1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a07682f0f9d348c71868f03d3c24c0f89674f96a21b1b7a851585cbaf58b2d3. 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/QMFW91900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe287e958f56b5daad664121c40205a10a7fecc75d549e56a7bdf4eff95a8ca5e. 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/USFLB2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd68442ff342bdb145e8f9776d2f33ed762360526d923b9c7bbb801dc0365b07. 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/USFLB2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722b3578378abbf4e6696b470de637cc95ceda6e725204d1ec9ec952fed32c16. 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/USFLB2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec479b105882ecd62750c58b9386a9194703a65fb1f0d5e352fddb1a3767324. 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/USFLB2303400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b385f3114372c9469a8d98a25d3302d1599ea358f05367391ca08b5fb30ad13. 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/USFLB2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47034e90c0b26f4c429fd1a3ee5f317790af5c421bafe7030361f43e59558f5c. 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/USFLB2303420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf325b1885474fe34f343f31a641fdffd1c3a6a5f1f354800eadb13de8448f1ab. 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/USFLB2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e464300d318f0121616ac11949dce9507649554d3c362522711edda23d9ebf5. 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/USFLB2303410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2acfcf4a555596f7a22dedb7e66086348b7154429b5026d8c53957736260c2. 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/USFLB2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4448a4773f6d19d819de7474761e88a02ea61963da12eea1ec60b2a89140fa30. 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/USFLB2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8656465414437d45b1a67db14f735985764a462e31a2871799b7a41c6c071. 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/USFLB2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47034e90c0b26f4c429fd1a3ee5f317790af5c421bafe7030361f43e59558f5c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USFLB2303420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3967424ed2dd9c1bda920d8565b4a8a272dac62dbba5ea1b1e775218bf999268. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USFLB2303450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e464300d318f0121616ac11949dce9507649554d3c362522711edda23d9ebf5. 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/USFLB2303410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d255b0b5c467a5e8fc7ccec5a02033f9189a00bd115adaae67788015d5c75c. 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/USFLB2303440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec479b105882ecd62750c58b9386a9194703a65fb1f0d5e352fddb1a3767324. 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/USFLB2303400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5541268decd803c3e92c2fff383b01eebbf8e1b4bae69d8bda93203e01d3b7. 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/USFLB2303430.