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 0x1db20fba8b8d44f4d638789d63dacf539e65f0d669d6083f6750dd5799a304db. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7abfc937-7872-4099-a8d7-a61c2ff545f8.json and https://artists.proofprofile.net/proofs/artist/7abfc937-7872-4099-a8d7-a61c2ff545f8.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 0x5e70e0da426727f1ee8d84992e3bd5c812aadba5d0f1e25c859a844d8e5aad52. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEYOK1654720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d13beff64cab7fd87fb1f6a63c0dc69b7825f1964f6642997d4ab04ae38d35. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CATL32201572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558273b64cf96fbff7f275b08992f1364e60755d49386514538ce081fb5f78f1. 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/CATL32201580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84e4de9fbade0f31cf140d16c12023278443a4bae79b71ad2180406255adc24. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6132413401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8660bdc49e325e43d5544c3f9514ffb9cfa01a8d8ab4e06ea4f57125ff61448f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH6132413402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b4b39e3a0df2d688edcbe28714d6b28f62539f1c0886e09519b790942dd594. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CH6132413403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcaceccd304eb82a47fbb831ce0d21ce803041ba4589cccf1f26010657d6b9d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH6132413405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf037844cd255c2252b007f2d7e054d5845d84e96a9e14ebc3000486cadac088. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CH6132413407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6842c5697f70d4e4c588f8adec9ad210fcc1fefb0915e08b7fa935cb48115f27. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CH6132413408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a2d495acba77fe07957aeb00cc9636475a18a63adabc0a6bdd576bedf517e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:27Z), 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/CH6132413410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da895172516b4f0da5982a12edd29f612008b1211b2bc0af874a774b3c4425e. 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/CH6132413412.