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 0xa01f20cf3c092f34bf633f7bcea1d4903496ec98b0714173a51d9a5062a5ec72. 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/e0067d90-ff1e-44b5-9a5b-9cb97241835f.json and https://artists.proofprofile.net/proofs/artist/e0067d90-ff1e-44b5-9a5b-9cb97241835f.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 0x126d438569cc572563909df808cd87d8fd6da7d944d4ed5b81c16d38655eb986. 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/QZFYY2134554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe899b341447506f50c629b0fe346dabc754fec6c9f0eeabe9836bf0ff6af0ec5. 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/QZ93L2121512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62bc35a313b25ff6ed839ebb2c5261b839639ea75514183c9e69a6722aacc8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VNTTH2180016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288463eabbfad8f0e85b0eedaef01fa9af5f5de0afd8e5601c36e4fb2836bab2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZPEW2210124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13277211e0d33f26adda462aa726284dea92173fd4fb5a50dbd3a40a0f8ba3b7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHJ2351222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7281bbf71c801927f7c9a7ca4c5ec38a4ce6214fdaa66a07152859b68ad4603e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZPEW2502113.
I Love It and I Hate It at the Same Time
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51b316df82f61ce20711f963b8d0ba70b42f39a9b5302f3065551008386ddd. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QM4TX2210824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51b316df82f61ce20711f963b8d0ba70b42f39a9b5302f3065551008386ddd. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QM4TX2210824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5f8b90be831c2404ef794bef4768d39255867cae429a613a996ffaae61e6eb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/CAENV2556873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7faea8580bfd9cb189753502afab71302eb801bb1a8312278dcfee408eed7cd. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZNB82531134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f05d3a693b8aa156d4f46e1febb98e937f630bf8a0173897022df48c81ddd5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNB82528431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19553151cdc72bf3078ad43c1e1f83ab5f1e0d3eba60452be10677ce4f25a8e3. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZNB82539696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de9197fd1501198aaa5cfc432fe4978b95d17fe0bb4fb51ef1e6c9c6168795c. 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/QZNB82566449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1469365d6026f0b67ca9cc7ab1f9a78bfb649d23e362944dabcfd31da0aaa8ca. 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/GBWUL2108787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc84d6a6de83279e3eb71c12af1eb4cd13397005de68eb5080bf8c89da195450. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GXFHP2573754.