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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e755600783f1251fca3bddecdda8e779d5f4b143268aaafe96a9f6219986ff6. 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/be1824ed-ec5e-4760-8456-3d57b098f01a.json and https://artists.proofprofile.net/proofs/artist/be1824ed-ec5e-4760-8456-3d57b098f01a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae97a72165eb7ebfedd0bd86c8a2d34907a80965d6c9f18f7714e74013b41e3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DGA092223681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5170af8cdf796fa3de18c467c07b07b661a1289edf3b2ce8d7b8a150ab07564. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/HKD012333664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9deaec06874a795e652c478caa4960d062be6cf7c542fad4ea76e62dc45fd6. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/HKD012521464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1453cb6223f34ad9d01feabc697fcbec52e39d7d2139a4cf12e82b2301fe022. 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/HKG732279759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb5cf51808249924bb7e243ffee692463c2b15adbdf78907758a089f49bc63d. 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/HKG732305654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff4d7fb0a21237b8d6c250142db1ffa3fc2e1e91c5279e8a97f7b0de1b44f9d. 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/CNZ512300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77084ee5aebbca5e00f50ea6ea0e25baa111a1270729957f91543ef4369b2e3. 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/HKG731676407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6683b090e353ef85b1616b5f96931a6d6f7a2c89095e529476bfc4754eddafd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/HKE022232922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81bd541f75534358c04ed221787ea8f4047379fb0a22a36c93c7df6028fa1b2. 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/HKG731697969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220ba310ebd720b3ab3cc7898a7c2cc33eef507b0dddd5fa523186bb8a6fcc9c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/HKE022234185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3909e4ecfc76df09f09b7a3904c5b29f20514c7f14312ba4d138e28a7ebe9e9f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HKD012317907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc429c68aab6ed97372b132aea5737465b068e13ad24d4c71b6fa2f1987605618. 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/DGA0T2413178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de88c8ca21cf49fd96c1f44ca10a775b32e103c37e5ebc76837c6218614ead0. 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/FR10S2536656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93236360fe4da5f55bdb75b5f33891ed22f8cefb7c3c25480a1773b8d0f3b193. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/HKE022323457.