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 0x7929cdc55fcad7ff6cdee3fdc5d553612ca3d3cdacd26c444e37294966a0b712. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a6d836f-f88b-4ca8-9af0-68580a171cec.json and https://artists.proofprofile.net/proofs/artist/3a6d836f-f88b-4ca8-9af0-68580a171cec.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 0xd02c55e37074f80b97868dcc6933e4c9c1b88876606f6134695de062d6495af8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:09Z), 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/QMBZ91565006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb3b504f52ee6e7f730278491ae0b79d0fd30441128634fe3ff1c9e1adf48d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADO1831656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54d9ef4834053cc64d7f3efe696101cfb906e0627e7becba4c229fd0771d31. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEQ2086334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1726196d7d054ad05b1ee5841dd418ad27c3ee517c1bfc4655410477f4861c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWU2197014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb4cc9cb5d40077efc8fe1ba43d1ebaafeed85451ad9fb2ef3978b23a95a7e. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QZK6M2436759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec18989d99dfbddb38de1828aaa0422ea500427bdde0c1eed3e942d661454511. 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/QZTBB2402974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241280314f784486051a10323e1e224a4cd8cfadc1a5afe0143534e466b0cff5. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:39Z), 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/QZTBE2467039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5140b04c647c9e89f670df473b2cb6db372050a22466a51d2cf22ef77bce925b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBE2467040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bf0f99a7aafccec5de9744726bc0153ecb419cb3ecb315ac111053b73f43ae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBD2474231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf4f89ed6c46697cadc4ef5c90dc37b6dab1ad50651262f7861668ab4c1ddd6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBE2467041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed69b6d88d718456dac171a4c59854f83dfa2a01e3372e179e9bb6e6f24cb1b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBE2467042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ed377e29701c8d229cbf8bc1456f5a9643dff1e1f240c8a4c644748af92ea2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:12Z), 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/QZTBE2467043.