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 0x8cebd162fa0c5a94c84c584cfa6123974d5c47e5c75dac60da897ed4c6d6b41b. 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/0956467e-7437-4ef2-a409-88df1c67856b.json and https://artists.proofprofile.net/proofs/artist/0956467e-7437-4ef2-a409-88df1c67856b.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 0x4a53b0b49f758d792df4aa0cd6293cbb420d530fbdd972bcaa03e10fef19ebbe. 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/QZMEQ2434169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbcb71e0eb017808e5c7f450d3a9189b06c6e63cfce91c014aa0dc65f3338ee. 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/QZMEQ2434170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fc79c666e0efa94dbb1c25a814b496662ee90b75676733ce5599b90e34b2c2. 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/QZHN42402616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacae84400359789337323f64a8260c4f8621d4a3140d883165c59c61a90f7dc. 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/QZHN52343291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43982ab00697b57767ac85af10832142ad39ecb3c756b13d99c0878f638a1cb. 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/QZDA62308921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b63fb12c23192164abe91e7792e30e5f8361addc06f24f66d697a63af88cbf9. 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/QZFYZ2385305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1e11602703a32c83e2df780ca8aeb9ca3dd29ba94f8066f5d763b728f97133. 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/QZTB92276311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bad66a4f26d83c87cf9f60d07b1ee33b24a86c72862a0e5445680cdf187400. 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/QZTAY2250926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7fd06c2f346bf49c68dd02dd3bcb7049f253c7bff00b0e3cd1b588b7b6f070. 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/QZRP42213973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee14370ce6e2a3949a57e0bb925a71975d676c3c901fb0632fe2547849b3630. 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/QZNWX2239433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd00b775e4a97f792c1303c146ea33cedb6b699415935f9af1769454ec3e62bb. 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/QZMEQ2243528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c64c43895930923b6f1b2c41247e2159395a21fe948310461eda521e5b98d. 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/QZMEP2263332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c77dc1daa0b5796c7b32bf7fe1077e11248287367f1a578bf6b4a4693261c. 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/QZK6G2207762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f56c974d52acbee8c7d70914c04bca86cfe54fcceee400060073cf058d28c1. 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/QZK6N2239642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b330202f0c2a7664a8ae96e880c3efce9a4d18d9ff0e4c8fedb2321a079e3f. 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/QZHN82234320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d9623ee24c04cdc31203f2c0dbe48b5a356729ab8b9de9848913ceda7e6df6. 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/QZHN62219750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109419875a303f153aa91f0173c254fa6e3be339181d2ba74c0db6cdc9baac50. 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/QZES92214401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4882201bff4f360402cbbc09331ea89e45b44cacd8db2111c2ecbc89a8479f. 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/QZES52202194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f42efc0d80553bb70ab38d16b2c1e58d9dade13c4aa32c63b33293c98e8b07. 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/QZFZ72214661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dae3af8c42ffecc10e7362ab33fa746cd1aee4d2fae64a54f6ac646772f02e. 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/QZFZ72214662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9a555af70b9478057ffac8140cf82da22ca40441142c5c8c40489c48a28db4. 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/QZFZ72214663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcf1ec05e0c020d172e22afbde45a059ea189054c5a43d6de74c80bad1912df. 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/QZFZ72214664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b01a810ff55c82d44b19594d3b181cd6c80f3981a2456031712b0a25c742f6. 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/QZTAU2137630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa294ed8773da1f716a6d81f3e399b71e619e373c2c84d09df388d6b8e4fce43b. 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/QZTAU2137631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd01d4c766335d9954c6667303b086c06c0c6eff438cf637e387f79c34e38700. 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/QZTAU2137632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b8f5701d168f1951bbc2deab88cd8cad94dd34f9f22725194a95927df71ca. 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/QZTAU2137633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0e179aff4237f48ff5d03ffb42264436e74f0624ca4238c1a0f859598404e9. 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/QZTAU2137634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e76ab261376f3164500e80dacbacd2cbca41fc99ff165de6d70db245fa183. 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/QZTAU2137635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f80d0ceb692985e62dc6130f0efb5ae8bb784488c84852f043ebdaa2fb6109. 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/QZPLS2120147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1086b6e1d14139dd0caec7fd8b59e65b56d11aedd46334eab0ca3c5e1578fa. 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/QZPLS2120148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf59fec6609d2a2c34d26801eaa508003a9dd10fc9ce697d6ea58fc25fa30c1. 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/QZPLS2120149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e34c6778ab3def549e4a152a280969388810ab027b87fc62ddd690926f3ab. 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/QZPLS2120150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129bd8e4c3a8468e5259b3f79caab805bb87ae066d0c7beaf29ebe193661d84b. 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/QZPLS2120151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac2e31c772b154e7c5f70480f661c14f531b345c7e1a22a88b4a6b052c2643d. 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/QZNWX2119434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2bec872b669f2bfcbeb77eaa87c36c93f09add49e575fbd8101168fbb11984. 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/QZNWX2119435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180512738550402c0ac1383c34edc1c2623e8773b4927cf3cad3c0eefab7f6d5. 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/QZNWX2119436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f46380f3ca7de0b6dd1d2580f54287fd157288d5e22be68037c75f7270a047. 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/QZNWX2119437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef6c18b772f986ac47efd02e7bf47685b5560c17b47fe9a69ee548efc042f4. 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/QZNWX2119438.