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 0x6346ecd08be30d88f3836c3420eef57d929d1e6600ceb8d2c02745585f116f1f. 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/c1544370-6594-4549-becd-dc50e1006830.json and https://artists.proofprofile.net/proofs/artist/c1544370-6594-4549-becd-dc50e1006830.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 0xe5ab1eda9ec0d342b19991a38574ad84e94427ee678183dbc43bd4c99438b6ff. 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/GBMJG2408764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e113fdc992eedc8115a4611cd14232622a43033f1ec7dc1288f83b73e8f4f13. 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/DEPI82308978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae707531179660ef22440c2727ce0f35e2854b22b6d566e7eaa216f36b41b637. 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/QZES82371757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30b4087f3eecf046ef0a543cd7a73984a427c572c19340a3efa47b9e312698a. 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/DEPI82215096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06871ead4aac655a25d856b41f6606a4a8391c88481dd76a451526c241c2fb4b. 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/DEPI82215126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b9eee49826b10e1344efd98402392ffb192151f6998ff2a30c9923774fde43. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEPI82215125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5452ce7e0b4879f7c1f114680d6adf87368e4c65083649c6a45fbe00737950. 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/DEPI82215122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a55562e9f3b38ba49f88d4625e76da6bbacd68e35b590f50028745df90e3351. 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/DEPI82215119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60bf6942d050555c099cbd1b3e1447ed4ce6f937b3693caa7a24f39cedbc3b4. 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/DEPI82215118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e89d562ef2287a266e50d6bb679865ac08a66631dc0e44541c7e5e181ea177b. 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/DEPI82215110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc9f9fcd4999eb334a931f0c0308641f013f3fa086a3c7f4613f41281d2051b. 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/DEPI82214953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6ca7116d12091d16f99b92d2ca5ff1e4a039cd20f97d0c828cde40c51e58d7. 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/DEPI82214956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eccc38f83d83b1b04e95aa0b047ca3c085acbf149d932c722b2bf171082b22d. 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/DEPI82214957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42442f0b7ea013e9a977dacb230cdb5f8e68928cac6572c13f71bbeee6b6b37. 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/DEPI82215115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605ed678eb10ecd319afdc7ee5d9237b64c97bfac95461129eca76b26082b703. 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/DEPI82214958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21350c876e4eaa9e587c7539240a2e2b08205e5e3bd78894194c2d248f75dc79. 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/TCAGG2228852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6066787cfcc6aec60966f219500071ce63a7825bf601c44b26a35bb07da160c. 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/TCAGG2228938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefa8ba9cb1b224769654ed4f5b32467b1c590da5b352b4e1796db65e7081e2a. 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/TCAGG2228961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ab1eda9ec0d342b19991a38574ad84e94427ee678183dbc43bd4c99438b6ff. 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/GBMJG2408764.