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 0x9cb53794d541ac2de369b1757430c7a1cf6a4d0aad1cf027d47bc88ec4bdb4bb. 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/e8135b36-7ac7-4511-a864-e79aade5d8ca.json and https://artists.proofprofile.net/proofs/artist/e8135b36-7ac7-4511-a864-e79aade5d8ca.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 0x7a21c8e58eab5b8f46917774b8e90ada9f498268d0a0952430e221617c7877fc. 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/ES79A2115103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6fc186aed682dd06bd68084f2eb3ca085b6b1e722a2659e6959e9d7e76af0. 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/ES71G2220506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b90b1de809f790665b56e1d1b03b157cbb6b568ce1f5cffff58eb1890081f0c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES71G2242311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb007a156eae676af32943d67d51f274fe201018dd05fe04f516f160fe36945b3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES79A2115102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd901ba62b8c60b921859e31c2b9f2630115a285b5867970045ea713245c8ae79. 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/ES71G2242313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b622759f02ef54896e0683b65281b26322800eaeaea867988eee94f38bef99. 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/ES79A2115101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83e30f43488622d1e55d88ea396aaa368fffc2d9bc34942ca2f043bd213d695. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ES71G2242315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46400acf6bb5fffd1db819757f2fcce376d2b6f4fc9dd1c0587c843ceebe93ea. 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/ES79A2015102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68a849ca02879c9f06cc37a52c0bf1502aedfe879a2714e6ed7ff545866d9e7. 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/ES71G2242317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616c6c2e94f0fbc330b2a2bb8dd488b461ccdeee6482a0bb3aee31154c616779. 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/ES71G2242318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae40a504a61b75f275532556356de855fc2ba62687362c53835494a41df34c81. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ES71G2403918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5d1c89d88bda988f9a684dd3915b88ffcb9f4e9d7af4276f889a56fd54ce2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2333968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38ab5ad33f54512ba07b1b81ed06ea8572cac212a92af3d3ef111d719854cc0. 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/ES71G2326270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6fc186aed682dd06bd68084f2eb3ca085b6b1e722a2659e6959e9d7e76af0. 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/ES71G2220506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21c8e58eab5b8f46917774b8e90ada9f498268d0a0952430e221617c7877fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES79A2115103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb007a156eae676af32943d67d51f274fe201018dd05fe04f516f160fe36945b3. 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/ES79A2115102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b622759f02ef54896e0683b65281b26322800eaeaea867988eee94f38bef99. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES79A2115101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46400acf6bb5fffd1db819757f2fcce376d2b6f4fc9dd1c0587c843ceebe93ea. 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/ES79A2015102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d48aa02ddbcdb98338767c86fb4721550eeb67e6058e491cc4fcd43fc804ca. 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/ES79A1915103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5af5e82b5716dc16ff6529b757d29c1061f144c3712f66e799cb8182a4eceb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES79A1915102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a6d444fd7f9e94405cbc2978104d883586e86bdf58dc38458f24f69ac17594. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES79A1915104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d05ab18cc795b3bd05b210670b71024c9c9e8a93e02bbec90c66ab71ff2eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES79A1915101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d05ab18cc795b3bd05b210670b71024c9c9e8a93e02bbec90c66ab71ff2eb. 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/ES79A1915101.