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 0x7818d3cc6c9202c2301d89a15c825b2adf3f60a58c2900f43382904074325910. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ea19267-56a7-44a7-896d-baea14a049ae.json and https://artists.proofprofile.net/proofs/artist/6ea19267-56a7-44a7-896d-baea14a049ae.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 0x13292b069a60b302028e04ff128e5b8fdfb83fcb4251baddfef98e8a7d640645. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM2126736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ce2d077b5954aca4dc94144dc26a35ab9fc9fa56a3444ab321e357625bb5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRMIM2126738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04cf5548d8dc3ee865a056fd07b68dce071395f6af05921a5ff38c593015445. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRMIM2126740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c5cac0c2d8fe222e39f706eb71ba9365ccd4d6d8a26ecc2d1f1e13ddc0274f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRMIM2126741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0959a7e2b7a177a68ec86d3673ed77bc9b79924a69b879dba7289ba7f6a56f73. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRC712300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326276e0afc9fee5ae802c4cd1a691000b6e72e21f86a796c12934123701dbb3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/KRC712300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6db279868a183a89554cb3ac6f81f67117ebc250cc7bc815a531337cbd4688. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/KRC712300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d75c9bf12e787c5ab95d2e2890183a9e994f84928fc1a974efd60de0b9312f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRC712300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cca74a3bafb890c372c1229fdc845c8f28a5af18400e2b9e943c0a896abfa0b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/KRC712300052.
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 0xdd299512a33a5f34b87f66b8fac63dba2ba70b79e97af8adc7672bac245e28d1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/KRC712300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27824ea1f3937bd8476cd97738b6f0778bb81276cc899da5c13351822656e0c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/KRC712300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669e319f2cd6a32a796ee3940f620901f31865988e629a43d1e5f7bc2655a658. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/KRC712300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41145489e49f362a9e4840ace0c6d07a8ac88c60b2e7911eebd2338895672ede. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:38:46Z), 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/QZK6Q2536365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa1e450497f0658743ce6158e95d238e21b4e5f4caef1f0c6361959405a802. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6Q2536366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0224f59c7cbae036bc8c36c80f2be318a7507b3596cfea9a8bdcd0fb8273ebb. 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/QZK6Q2536368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6523b167fd60336d6b80760b053c963df1428fa3d17900deee4e6e7d82bc212d. 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/QZK6Q2536369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65b0d63e6aa209b9f5d64b62600f6cf97e98f80fec7898cd5e0499b1f956785. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:17Z), 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/QZK6Q2536371.