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 0xb2ea8ae9eb6ab1ceb54c130c77efed332bafb8bd30de1d2129e14387559c78c7. 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/cb5cd1c2-2bb7-4275-9336-9ff6664c46f9.json and https://artists.proofprofile.net/proofs/artist/cb5cd1c2-2bb7-4275-9336-9ff6664c46f9.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 0xde4e9635afe37c9a004154a32ac83321accad2554789994d6116b3d372513c4c. 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/QZTB72320743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49d1fb46f724e6441747f7e4b4eeb7e93b7bb98fe0020d9ec21db2d24b0f69b. 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/QZES82217589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa84e79dd5f733deae95fba5ac3b093cb27067db6bc307134d798cd7a581237. 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/QZTB72320744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa374523ed431f152475352e6d436bf0aac11087362dba0b084c76baf2e6a9dcc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTB72320745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc3a016eca69313723684888aa53af764db24529fc13f2940bab70b1db98fc. 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/QZTAS2269311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d700e109741d8ff9cf930a19e255e4afc7bed05aaa01ef0417bf690fd6179d9. 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/QZNWT2276704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b5903bf1ebe30b4768b59de7701b4348d47a7ccf0df33018373cebfffdd592. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZTB72320747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0194d9f0dda89d1df73cf81ebf72e89ab163ab757ce485094485a485a2c1e3a9. 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/QZHN61978115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c12d0f13f73347dd8cd3e6a56f6c90b896ac77d587d947f5a82114810e8ff7a. 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/QZHN61984116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80db07bd08665dba8ee26c5bc51605d0b023e125ae8114381c5e507f5c2daec6. 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/QZHN61984117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba5c543761122e2f3ff59e22853e0bd5310dd539ad4326adfcd8fcca125a8c6. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZHN61984118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fee114490fabaf97095248f1aba841f5d34a5a3c8e3f5062d376a0e628ee0b. 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/QZHN61984119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca309ed218f95a8cd09b190817686e24f547385e4684071f50254d959e707d9f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZHN61984120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a415876580db57beb00029809526508b3a9710653a8c96397df6587da7d57e3. 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/QZPEW2549842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4e9635afe37c9a004154a32ac83321accad2554789994d6116b3d372513c4c. 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/QZTB72320743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b9db847c7a96a097e518cce77f334dd3f616e3beb725baa2e3affb19798ffe. 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/QZTB42215678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc3a016eca69313723684888aa53af764db24529fc13f2940bab70b1db98fc. 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/QZTAS2269311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d700e109741d8ff9cf930a19e255e4afc7bed05aaa01ef0417bf690fd6179d9. 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/QZNWT2276704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0194d9f0dda89d1df73cf81ebf72e89ab163ab757ce485094485a485a2c1e3a9. 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/QZHN61978115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc471265853f9e1bff0e9872609c95e44b411203729d1eda5e266a4a94b682f4b. 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/QZTAZ2302896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa034ad9d36954b8b07c703a4f4ce41f6cc16ee00c530e9ef7fdb15e78eab6ee. 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/QZTAZ2302897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3159c409a33ea1f410ac19be94b3d5020ce10834843689cb45ea766126ba7c8c. 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/QZTAZ2302898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de9b754a1db9e71b59bf9a2c9ebff47be6da01e3877b112e4bd7bddf37bd49c. 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/QZTAZ2302899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d054c83691bbf94eb385470a9e1afdd08e89e5f9209d2b54e9bb1a6deec23f. 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/QZTAZ2302900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0a1d3b25975dc0f16e666370cae60f60095e5d95c06352f30f1a49feadf547. 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/QZTAZ2302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476a8920a883263f6b3866aef94844dc8d4dd7059211842bef1c04729a6b1c77. 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/QZTAZ2302902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333df249e7a19126f0fe27b2fb5047dd08e3a1e1bd5a7868a191447fbde45a9b. 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/QZTAZ2302903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1d42ab979361afeae0088a73898bad28f3dcf020cf5ab4d846fb4fdc104234. 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/QZTAZ2302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f6de7717f70d93d28449c57fd76c08fd74fe081fa91917c5b80d557579be1d. 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/QZTAZ2302905.
Rag Time Gal (Live at 8th Street Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1651c366b0a6077f309a744da5ba1e0229d659c80de794e4e90107e61bdff066. 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/QZTBF2449723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3159c409a33ea1f410ac19be94b3d5020ce10834843689cb45ea766126ba7c8c. 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/QZTAZ2302898.