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 0x4e65a78c6057f62c3e6308d69d9eed8df4b2e7538a9943ee1105565bf4add13c. 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/e1b71d4c-d46b-4087-9f1b-d7b9f9920f2e.json and https://artists.proofprofile.net/proofs/artist/e1b71d4c-d46b-4087-9f1b-d7b9f9920f2e.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 0xc1b4e92ec76787edb8d7bb7118ec0dc6ef20a6477495d2b7c221edca65f554bf. 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/HKJ961901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a33b3e749b5cc758ef03ff8b408b888551449b220c5ac7654062c7e840594cb. 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/HKJ961901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79c8b5034f736f7f6ed96f5e5c11af22a5d0d3bf0152ac00c3c91c1a6b55603. 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/HKJ961901004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c86ed7aa73ccbd208c2853b4429ea8a303ac485220e7c31c31effa523dba6e. 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/HKJ961901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dd4c16b88f2b3066ae014054c2f19f42143339fc4eb543422f6dcdd2b0bc5f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:40Z), 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/HKJ961901006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8415849389ca11ab351454fb27f728769315caed3c3474e30c05a796e6b013. 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/HKJ961901007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce63b4bdff551d30986eec571a8c6676958bebc8e923d8882c4fd31543b125. 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/HKJ961901008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af71a0af902d7a2c0108f19c33451740cb8f8ffb11d3e6888193f0cceb09939. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/HKJ961901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004237fdb04dc87a263e380b31c07baccf478ed94156b58521918955f466db40. 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/HKJ961901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc38f83dc0c5b5208446982c983fa02a32647234834ffe6b9a7dc8ab1722e5. 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/HKJ961901011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5828fc1fb84d10bde02ee51388df713ac086244dd93e8feb9148196ed4864720. 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/HKA871900048.
望穿抽水 (feat. Seanie P, Tommy Grooves, Geniuz F)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83658b7f285ee9531dc4dceb16e645fe08230e171e8d527592185df1f73e80fc. 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/HKD881700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1e954a265b42c33cc861be38e16878da86cd8a7bd3f71c944d463cc6f39545. 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/HKD881700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca0e11601dd12a1f7348e9eb8641a8ee27d7e321799a7b144cdb24b9cf74f90. 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/HKI492119201.
Do Your Thing (feat. Karencici & Masiwei)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45c9d3d2230e87e7bc161070987a06761e25bdd569b3eff456b4f2cc7280b81. 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/HKI492119202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad13cd04e4dc1dcaf443988f54b05f991ed2aaa2449cda22cbf4156ecedb8402. 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/HKI491919101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993f15a791b555ef50d03e7e26bc4697bc457a4121b3b6fd4383517f618b53ce. 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/HKI491919107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc366a7c52640990f7b97783e78c2a9f26a1be066e48512d62fa974dd29f400b2. 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/HKC091900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d62033c1063e4302d346a67a9342eff1851d9d857bbd3732e45c4b49b19888. 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/HKD881500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0f44cbebb41c6d80735224932df240550e766ce418c35f64d50581bde14e52. 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/HKD881500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a6c3514be057ae8e93ecf4a4d1b94a6573082fdf125e9c69cb8ba3ddd7836. 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/TWCC31800129.