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 0xad35c203df3aa8f1c65656da0c00b06cc588d2b6d6956965ed549c699ccd1c6f. 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/33d63aee-ccad-4c4c-9be4-5de795d0b3fb.json and https://artists.proofprofile.net/proofs/artist/33d63aee-ccad-4c4c-9be4-5de795d0b3fb.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 0x984ce4bfedf5e02f03432f44d0bc511d47b76ae76bbafa77b08ba171eaeb51fa. 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/USUYG1751102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcac716ed61928b53675b9a3a433e5371b77673eb79b5ea32f0009b83606961. 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/QZZ7R2457593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414fb0164fa1e5044c2ae1bf34f0ca0a10715345f105a889b058d6d7ab1c3cdb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:37Z), 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/USUYG1751041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a109782f771c7213b94e365e104b4c132424edf2319e64763476acc56c6fe5. 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/QZZ7W2496896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6db1ea980a4fc4b1ba5eeabe56f008c1a05fa2c4e342cfe7a0adbe64959f23. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA72534097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f8a86e7f4a43c4efed1a3560692095ed608f7e4238aacea6449dd550a3b818. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6M2518626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5861b8918d99e02d96ed20d98a6d5953f21952436948e3252040e00263e007e0. 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/QZNWT2521346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cf8aa7fe8063d4ad34d9ba53b8b3a441c0527fc5a126c70aa4d0ee8ecf92d1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWT2565084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ed632979a6552eb226c968719dff59e2a3c1955bad6c9a973236243ae5a656. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWU2520506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e58e5cd0d9e213c0825c49016ff77d73712c3166833e571ca2daff50a764b58. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWW2527919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b111fa536cfa3f495291164cbc0be0a8267c512fcfcee2b209d93262ed65cd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWX2521562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a9988d884aa7784c3d51b62cb48d816179332c79070a069e454f1eb4d2a897. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:00Z), 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/QZTAX2552300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ef85c1afd7589b8eaf1e0a09f277a6d4cd4ef9679fe6d2c514d4bd6a811d6b. 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/QZTB42541378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda722811ec305629ac58203c230925afe55d4f67b109cdc29d69efbe82b95754. 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/USUYG1762501.