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 0x1554f9749cc70e5633f79ff8f1039a75dd9f1c38012f2aecabb14f0c866a5713. 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/9dab01b2-41f9-4838-b6c7-1e2662be4db0.json and https://artists.proofprofile.net/proofs/artist/9dab01b2-41f9-4838-b6c7-1e2662be4db0.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 0xb7414cd169fd028d67db84003ef36b809a1b6f1e97df6ac238f15fa869e29f3d. 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/QM4TX2587446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578c494231ce3244ecf13848b6d5ab34ff6042bfad5f2e354984b767a247aab. 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/ARF102200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e8a58af02054d980c2e47429eee33cfcaf0bcbb9b30f63ebe29c4e4b1a725e. 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/QMFME2393506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683bc9937780faf9408c2e360e2a063b6262165d4338456b757159cf54734a9. 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/QMFME2334051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b06872cb33a983b4fd6ed8d59bc1fd88e9866301cdb02ef415dd0c71bd01b6b. 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/QMBZ92367813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62455718283eb3b1c8e2fa2d3ed2403f28867816742f5ef0228b83dcb528bedd. 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/QMDA62244860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69cf7104b0a4259c99a569195d17239502ca9e4dfc6ecc38ca56229248923ad. 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/QMDA72186228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a03ff2761f22f921c88da3d7060c58bfeb98be7f49a4e0a936e0f5861d8bfc. 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/QM6P42318362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8090ca8cf91fb981dce45c870432244a1c0d2952f5775c950e3344c840e42e6. 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/QM4TX2334379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e740ee5f00127fee657306604dccce93e4183377b82db2014311f65bb225fd5. 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/MXF152300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf78da4d31d6e1588c8aed005b4070af079f96ae700b6b456ceea42a1d7349a4. 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/QM4TX2342279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d07c0a6edd99d1d60f7e8c6eb3f9ce1d82b735644cb472645ff675ef24b58c3. 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/QMDA72227774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1d53162e49930a5fc2f81a92c370042205e4c36a5da36e19d506ff3fb0e3a. 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/UYM122200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9b7760f9f94767217d6817ccf214e33bf11359cfd812f312af5662d0f3446. 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/ARF102200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6216245313cf6387d3f5617bd198014076cea5f8ecaf4bbac10ff5f7add141. 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/QMDA72270972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1358e4da6160523e94573a3b8f27628efb1ed23491ce6498f41f56ca6c77f128. 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/QMDA62224560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a433008c39ec112c17065ba8d7c26c24ca715d82d34ddbdd138eb4788c91f4e. 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/QMBZ92258051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3ecb18796e6ee389d2b2ba4ddfc06c5a107d2e1fddc192aa69db8cfb8148df. 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/QM4TX2287081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79219c7fe91f65937e1767964c144ab850c5cbe650c47337e00570524156420. 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/QM4TW2236704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c882b929a3c0654798f8b594cb87a170703f6fb1bfa10b6959ac8e55edec6e1. 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/QMDA62180634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbb446858edc98ee9018fd90530769e9e47e900b34b36064eaf641f1e952e33. 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/QMFME2194218.