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 0x51a7ce1e7ff3179e288dcd7b37235577c610ec4e9d81e5f717e3c4fb27de618d. 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/eb108c6d-4a6b-4a97-a8a3-7e554a84f3df.json and https://artists.proofprofile.net/proofs/artist/eb108c6d-4a6b-4a97-a8a3-7e554a84f3df.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 0x3ba61aeb8ebf98b0f4e92b73cfed5d2843cbebc555367422a3cfcf10ef3ac597. 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/QZES92004175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6718e6fdb31244140693231fc70c7f999aff306263187b6c901f78300f1cfca. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES92004183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462dd1cbc8dd27691d0fb24a6c84b356220795e00ef74e2a3e285e782177ce9f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES92004185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cc18be06308462d9b8d40b0e07c61a84f45647740ed56a427094a3108ff6d4. 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/QZES92171585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351cb51a97d6462b38640d5f556b1b5e922fe0218785df317654ab717a899d2b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZK6N2154030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1622687698a048966c7e459c7c4934a5dd1b1c9058e4ee8d5e5709434c0bd933. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYX2347704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb99d9d3fbb0bc1194f3f25c43a3c072b72b92d5968922ce13e282df2beca6a5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBB2271207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c5a71452cd25b703a620fc3bcfee4ab2853171926b77150cf195a2d2634c24. 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/QZPLS2507854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4a0bded9f9ca58d3da7d48abec4b14dee94073433acb0fa6736d09312e879. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/TCAIR2495644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a761d1c22601ecc58598bcc4e6cb24f0cf9b47e695048ad04ea4415053418c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6L2541721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1cbc48efc07783c3e3eebd1d4f5b96d2ae29567e8876b9f43ec20d9a69e427. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJG2575343.