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 0xb2dadb05ac2a9cf1840310f46280f9664a9d1df3097b267046a4c59eed3c3beb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2bf1363-7e09-497f-a414-64dd76094ad9.json and https://artists.proofprofile.net/proofs/artist/f2bf1363-7e09-497f-a414-64dd76094ad9.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 0x472fe60314b44bfa6a67081420dc62e4b359e975a68c1e7fc8b975d62e08ed40. 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/SEYOK1656722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8935e1f432adb481923ab16a0d2af4692877fb116eff505bebe225432a7f3c10. 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/SEYOK1656724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef2aabbd2cf49ee51bd80839095c22dbaf959a4610f1b94337d07185b627840. 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/SEYHZ0800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99be42855f81021036440c620aae28661b2a9ca2e140a7d8bac4ddd25aeca8c8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:53Z), 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/SEYHZ0800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084b2a6d1055181ca70a0004bdbdc6e65324420a7dc5c6a388df1661e02035fd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SEYHZ1100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37706907ba16dabb407e89e7b14e149df967d183c05165eb2f8243e2a8ee91f7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SEYHZ1100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b5dfe86c9c010566eb380a92a3e49d9031fa5caba4b0de112754827cbd4369. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:34:24Z), 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/SEYHZ1100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26d78de1efd02b5dc805c553fdfb0e8ee46b46a4bb48f34eb9a0054404b1abe. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/SEYHZ1100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf081a75a1503365d6fb2203e91001c898dd16fb6b9476593cdee54b4a3ec2d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SEYHZ1100504.