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 0x08d68f8f5c32bb4a47755fddad03fc031edfea3f1f70bb40f381132bc9091603. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef5612f4-9c2e-43dd-b3d6-c830ee4d4002.json and https://artists.proofprofile.net/proofs/artist/ef5612f4-9c2e-43dd-b3d6-c830ee4d4002.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 0xb49d9009613e785f69a75f53ba4de8ecb5d0b3de900338bd2a736215b3064cfd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/UKXN22475751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb39607cdeb56cd43804e2cb2a36d7e6588e850154e93ad8d44e51fa5ce79f13. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UKXN22475753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef051d7b6bb213e1dc2958d7350e4d70af245618390efd22736397013512acd. 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/UKXN22475754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959a367788469dc4243f7660140aa799c821d2a218ba76ebfef4c73d520fd857. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:36Z), 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/UKXN22475756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee62f410964ccb892be4e52732f58f0a646f9c2c3ef658bfb29e5b6ae78f08be. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22475757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e85833764c75535639d9b3732de0c49d2d620b26e15cb6c8723cd770df796b. 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/UKXN22475758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03710900d14b22b387344c2472048913fc4a76479b95bd40b51836abd6af54c9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/UKXN22475759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa257446e3dd171b98fe34d83ec7ea8591e91866b7c71cb582ebed91281586587. 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/GXF9Q2522911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4734f6b28831440ea5c438fbba45283807a82cd26d8265f658c0fb8c34308c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GXF9Q2522912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b63789238b32d4cb3d40e4b345b5380790ac79add1f17cafbdb03de86748a3. 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/GXF9Q2522915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9dad43c78e442cf61f166e52c74ff0d79e4a046c731e9f1116ca73821c265. 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/GXF9Q2522916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a582296ba8c6008249c3b5edc3db5133d44d7517500683cab964af089cd3859. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/GXF9Q2522917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927276f8e910b89ee734e096261ce56bbdba638acb9517a265924546357a45da. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXF9Q2522918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47325bc643af5aa7266fe97fddcb3bbd3873dcb61c94d78fc00a14dedb2d00. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:04:34Z), 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/GXF9Q2522919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47282a39b69e663f8d4d232d2a4b8e025c232e82c5fda7c06fd998d95fdbab0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GXF9Q2522921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5911586b6929e10d67fc52cf987772a57a8c56bf7ab9a9771dd1ddb62ba74dab. 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/GXF9Q2522922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15693bfda762bc5d0ae91b4d466c35fc83315aba56fa484ddb88a9de7d86a8f0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXF9Q2522923.