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 0x0801264fc59f9022e80424a4977c7ff289b76545e582c41363b88ac5cca055a2. 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/683aa941-2344-484b-8c05-3e99a3ee06c2.json and https://artists.proofprofile.net/proofs/artist/683aa941-2344-484b-8c05-3e99a3ee06c2.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 0x5283b7ef57fc6a154fdedd555be6e901898b79c14f17235ff75253b86809fc09. 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/QZW9K2430118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5c110b4e16b41bec98736d1deff304b970ae6732f6a9eab43a28d2eb9b1616. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXIV82404462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d458ce654fb3c57228cddc6bafd96a6e982af97f45a47d658cbcf8b84e8fe58. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2438035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2760bb9f14895a3752b2e1eadda30d13f50924607ba5cbd769f09b9b4d12eb61. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJZ2486302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75e4ec8cb0a678dc5d0b9adede163876289013543c27e0ff24f471dbe46f1b7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJY2427489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbd34dbf532f407357425f85805486506aac9e7e8758418b7c1262dc960e4f0. 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/BXIV82423989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cce45f0fb78e9156806e9d5f55769ee00ae58b9cdc40a584955db6917819d5f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2431354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43895c22927188646683cf746438152dfc5726e5154dcce7a5e9fe102cb79974. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2478298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa016001144e79b58a4efdbfe906e0d1dead9c2c914dc3d13a899bf1dabce88f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2478296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb0360b88e09f830c439c3913d3a4ba069ed0c570ffc3928c281fb19f6ae5bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2478297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd559420288ac5f6c8cec6afa116073573797f6d9c9a5a150ad31d381924929f3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMZ92493353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd97c826632a1a4e63387e2f28f63850cc2e5922d9b910ac73d264677e5b675. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92429772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d934f4456b8d4d3c4fbc4afc1d9c0b87932c1d1afee11ac27bbafe9b899b36. 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/QZGLS2469094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb967023656ffdbec80c690ea5dac8da08625f4c2e52c3bcb5e7ccdd34b69ac6e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2401573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174772590947fce6fd09c230413fe1b19303823d20a09a4fa69b67982959d8a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLM2452159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb08d776500c2d9c4b6eec22e3159f8a8d5832404109ffa85275f0fd3d03bc9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB2440619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2839451f098ecb1067a557d72b59f69ded55a0a72025ff1b9669ab65cc592b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXIV82418382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f729db5ca7ccc70de0ac49fc67ed89a9f6121a88e2b606022908bf96d0aebd. 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/AUGBT2469605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bb6aa442d9d4f414d9fb125a5f8011852fa23ec9a8548445f9ef450649469e. 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/AUMEV2521952.