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 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 0x3aa74488dcbcc80daadf53f5d98a164aa3d047b0edbc31209bf09bdd00624798. 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/48c4e046-5abf-483a-b327-50b0129fbb8c.json and https://artists.proofprofile.net/proofs/artist/48c4e046-5abf-483a-b327-50b0129fbb8c.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 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 0x85c5bc7c20300654d821420a2ea197f1db5b6948e17bd4ae4a611e7a764897b6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USHM21548799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b648de487d3d59ee494a1a8373b82bd67a280215ae6e3e74f29be004fd8107. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGJ1780728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d1a9e3302ace30ac8d83623516e9e0d5f8ecc4da3b1a134c1b45d170e210a0. 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/USCGJ1780729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde63360b83b402b24d3f20a68937e7e4b591f433c7633171cea91b2d5e2c551. 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/USCGJ1780730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc785486136e59f98e99c988b43823cef0129cad0ca2f76713be974a5dc98e4. 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/USCGJ1780731.
Jam in the Van - Brainstory (Live Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe256af1a18fd378d75a82ea03110e79b2e533641744b4c61139ed187ca410a46. 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/QZ2L61800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f08ddcbcd4423d78bfe7bf45cb3b57ff5e5bb049441d71633f24fdadfe83415. 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/QZ2L62100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe890b9d5cce0b525fa8ae7f9fd41eb52fb92b2a12d795614cd7c0ec42f799cae. 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/QZ2L62100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaa84232e5bc725ca8ccf76cefda741ff8c7d207c79c1a5f0fe8b50461c3e0c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ2L62300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27969703586b9dcae1ecdb80fe11bc96520cb2b9deb192cb9b95a7919d8a53b3. 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/QZ2L62300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727754c9a690f5b237e931ec3e7a6fee1e648cc6981dc46261261c1dcb857d52. 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/QZ2L62200052.
Big Crown Records presents Crown Jewels Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bb4e03e321c8d35bfc23a2da66079113f52db3f844ed51fe4da4c0c7cbd49d. 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/QZ2L62000090.
Big Crown Records presents Crown Jewels Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd6cea2208df9ebf249e1bfeed86d588b32d98b0c4b67ec3b73345fd3081617. 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/QZ2L61800100.