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 0x2eb9aca9e66d1bec852fafa53151382e68846980dab870cefb6af7af4b681373. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/464f6cb4-44d5-4f18-8867-1b66ef1a06b3.json and https://artists.proofprofile.net/proofs/artist/464f6cb4-44d5-4f18-8867-1b66ef1a06b3.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 0x425c09e6f3a5a3dd9dc1a59fd9d5670d9ea407116d69857f1850ac55ae8a3783. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZFZ31912266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf394818174255cc077a56a3a5fe0f1fb266ebd3276afaa69f4932ef6790a0bb7. 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/QZFZ21993016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6896b89fbb925be00310f39483ff50cfcc710b6e10abda5c0f6dbe8ee3e62128. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZFZ21993017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb38cfae0674047cb10db0e8d4579b5284870bf92ea3d92b64dca341d4c49b54. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZFZ21993019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12e52b5a929a29929b4c42824f8bf0101b579a3adbf52ecd410d96c1dbad77c. 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/QM4TW2213456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6535018c86c1b4eb8c8bd8e44d04f436f84c61b08c77fc22935a2b608d793cf8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFYW2006033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dc71f71fc1eeaeab7e25493580cabde556ca881633bffee3acf521c5e40c9b. 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/QM4TW2213461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622b6bc6b855e9af13e142311abc1819c0bbbbdba983dfa9b4a10c7fda3901f6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMDA62150541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dc71f71fc1eeaeab7e25493580cabde556ca881633bffee3acf521c5e40c9b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QM4TW2213461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394708da9e127f4ea03a6a8efcb5ab7a0ec13ede1b96e97dd68d9eca299fcfbd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:39:44Z), 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/QMDA72332066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde84749d8ac29974ef7b84925118d858115c69fc2011ff9263abb8deda89b1d2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:34Z), 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/QMDA72332065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff81ee22e3c855985250d40ef579aa73ae92ff7e36bd2489bf2b4df23e53942. 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/QMDA72332064.