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 0x43d0cea367746da67f66bccf0f2e8c61dc26413267ab933ee27782209701afd5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/102f0dae-93f1-49d8-a499-b0b572d19ec4.json and https://artists.proofprofile.net/proofs/artist/102f0dae-93f1-49d8-a499-b0b572d19ec4.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 0x8d61beaf638f7a0889a7f756ab8b9ec2152a2479fb58eb2b35622a8518c6eddd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMDA62141067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0713d571f679725883ec5bb6df971031f3488d39196b46ed3b2cec86ae3928e. 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/QMDA62141069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd5f0e32facdc9c71720b378c812f29c1fd2aa5aebdb8f76e498da5690308a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62141071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931deabfcf80cff5c8acb90b740c53d18cffd5cfa4fb1c5dbf9e4264915802c2. 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/QMDA62141073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92e3dc4443d6dae85c76ca5952088aec89b24d05032b2f489f251cc0065d7fb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM7281866217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ecfc5d1b1d014f793d9717734fdde6c7423bd2e13662bcc0c04b1dbb1700c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDY42029823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc21a3bc9da172e05886b6df9d06ce34e4a004080261468f6c52b271d0fc285. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:24Z), 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/FR2X42437961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b93aa60ed83bfb641d5abc5d2dd25362bc50a3e5486a7caace8998a5c62a305. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:38Z), 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/DGA092499876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b857c6ed11429d1c27b6a0a8635f93e7703830e3238a1ea8706bc128f51038. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DGA062565519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf334eb9a249dbc43a12dda19dc2dc47636ec1f9347a1570da4417c01532a53. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACZ1735521.