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 0x33a72ceff1a277ab01faf159a03651f9bbb18829eaa04dea20fb184eb3b3941e. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa34ba52-456a-4329-bb4f-972d3154c47b.json and https://artists.proofprofile.net/proofs/artist/aa34ba52-456a-4329-bb4f-972d3154c47b.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 0x33c5ff7f2a884ef21410db02c5206cd09cc75dd7de11f5ccf326db60a85b8435. 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/QZDA62151269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da09ae100a3f93f3bef889f85a27e9d7c09c08c8bc9832016c083e73a316081. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFQ2323967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee7a0cb5906df447f52246c052d5dce049c34fb00ff543baf9f8b6a053a04a6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFYY2408135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0919e624f597ea795e7f94b243fcd47aafcb20b777a9ab0030a25092d56944. 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/QZHN82466248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6398f77b270f406e9f41d2237c2c9c19b610cc60f6dfa3036c24278e225faf98. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWFS2484397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d0cabc109cf396aae0f4201f8f1f037d2446759805ac1f363c19f19c918384. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZFYY2528036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdc7d0dd4e5f4e47b96a4ada93a5c59b3d2576673956f86c252db8384d39101. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZDA62579396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb9f4ba5f828bf8f4d7ffe578bccfed1eed551dec64811c01fc786d3b81d47. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEN2542470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb060426b018790c32ee11e2ec670afc4d180243efe8a4e81f4110045f4d5b6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTBF2505700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ae779478a2a9cd2cc2a6a2e510f91b115316c9c94ab16e49434031e095f48f. 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/QZWFG2507076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77738e0bae8fc16e6cd3e516d4d167c1308a4b4ff181353b1460d3cba9577435. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFS2501832.