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 0x965968982bac41cb6a6ef206b381d2aaf51b9cb01abd190969955edc34e77b4a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f7c242e-9a30-4bc7-a567-efed2787ddb6.json and https://artists.proofprofile.net/proofs/artist/8f7c242e-9a30-4bc7-a567-efed2787ddb6.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 0x51dbaaf1813a82e8bd0e5cbe1e754769a358004b6ed9dc845afedff318d5e928. 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/QM6N22085127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3c7afaeffaca3f713586d6fbd4bf93fb5a578a60876a3e5efb3b9a2e1ee846. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMFME2073309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245b81f71e3fd45079bd7650340fc74998d8714170a49c814a27c24029c0dea5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZSYP2132353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806770b85fb139f70714f1c9c6bee14d2a63c2f2cf196158bda545c612f598e3. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:17Z), 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/QZTLA2244455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806770b85fb139f70714f1c9c6bee14d2a63c2f2cf196158bda545c612f598e3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTLA2244455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a47d65bb8980d87da554b4a0ceab154d3e62aa1952265e642e35d7f1f6ec1f3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZQAY2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b6aff4abe9d405994d450bc9da5e249d593f8d3c7234b0cfc59acf76b89cf0. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:23:27Z), 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/GBWUL2201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844379d2932e57e97e721438750d654ab305d24dbe3c7d451d2e0bffd5f890c6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBWUL2239496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa0870f013290649479b9ccfb7d6846df358e8aaa0b6dc8440f0fda85aea8a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6K2317001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbdadb6dde39cedbd13b0080519fd3d17bf88524e3599a8eb1abedca270dd11. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMDA72358439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6148faf59887a2223d929ae9a9508e331226344754a51ddc650dc563242e8c9c. 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/QT3JP2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe203688b8c59074be4e7e08ce08a133235608f9b40b63fbe563918119cfeb71a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:07Z), 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/QT3JP2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e705d2b82face10314fe04e9419162d5408160af19c9a02ab4d9f83b4a710db. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BK4DA2539097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e7fd98d95b5f63af30d4bdf3829dd1d82f9a51d12809ef54d392ddb6114b26. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZKDT2300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc393f303ad6bdc5d82dca8ce43445c06620f4ba3606c981eb584b4202d7db0. 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/QM4TW2576052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7779ab5c750d0a44593de981d51a514970d4a8856b594ce4cff5deffe66b15ee. 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/QZTV32466524.
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