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 0x5c95e26186840dd69c1c2d73fc64939e9dfb6c157b68bc87adfc8a90cb1d38f8. 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/9da25d5d-29e4-41fb-806e-b67ff65c0bec.json and https://artists.proofprofile.net/proofs/artist/9da25d5d-29e4-41fb-806e-b67ff65c0bec.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 0xb34e132115a9386e69e94ddff74b837b9dea07aa8140467f29fec113af61c8d4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USANG2267812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80b6d3647a9f8365e6dcdac4a00dc57d25f6ff0a73525f8b20ea59dc8a89a1c. 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/USANG2455871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7441a78f76454f796de015b2f403a94e2911b99cac0f85bc617258942d2f18. 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/QZQAY2478125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3d699fdc33e05929561cce746f8327702d000793e64edc78d1851ce60bb3ce. 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/DEH742411092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fba77fe9275812960e275ac31ee7f56502b1a5e396651222fbb863cd04cc53. 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/US3DF2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e4d32f0ae7272a27c8412e968ee34f334b5035071035b1f931c782b3a1f45c. 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/QZQAY2436421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f46ae75880ab5c9f3a6d6f070fd293cc08aab4bc020a1422423abe8efa66b0. 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/QM3DF2495237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cde10994fb3f82bbb81f68c7be0681e7b0df8592ed00c6835d2f4e08a7c551. 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/QMANG2211115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5628e7cea26a462361651727ddc6eb513bad220855c9c86bd770b483203b5fe4. 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/QMANG2202105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0770ff799f99a1a3e95c59ffc79807bfee70be7acfa624679473bac82939a266. 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/QM3DF2272321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb678b2ad6f9bf65a174b6c3486c603d7ddd4b29dd69094d87c820105491eab83. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DGA072319408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07412cf6568bad9b569c47b0cbea835b6124e6304c841e2eb779f8ffeacc2fea. 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/DEQ022381834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d4e5b930d733c9f265444acf8e4544c9c0a86795ca1ad5adf8c2f34beaeb8a. 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/DEQ022381832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceb5977f472c17793c2f6e5f310a565e83cd331e50d53a3f0860105da418272. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEQ022381833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f01cc305010447f1308fd3da4553243ea9866f6526f14ed13731aa3b62e2f0. 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/USANG2270783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77585f3e8307193f04525d53a4ca7824acdc48f56d1513973932b3b79ec94d00. 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/USANG2296633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca6afa8cfeb499375bd5c2b066dafd741b8f5ca9eb403c7fa44d002a071bae. 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/USANG2260228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b1ecf9fca3a7af2f25f43c4575e1252409547deb4296def6b6ec830fad6f53. 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/USANG2266346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bc130cca0a33bd557888624af48f30487981c1f7eccfb46b7b63259deebddc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USANG2234852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894bab3c163d4dbd28fd38ccbbd9069eede37b985cb2fa3ab87a9478469585a. 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/USANG2260033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e65c65f6fbbe954267d367ce8b08e48d9c773cdd55925130c3a0adacea8f808. 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/USANG2247663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6594786052e90aff5994b309de287f613590885c87ff3637ebe4a52881df2065. 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/USANG2227925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a0e835f90d3aae45728552e0c109d84209baa28b27c3f20a75dc4b48e2b5f5. 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/USANG2223668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e805e729d8d2a6b1130106235c85d73fcda658fd0bc53e26fe03dee3b69c32. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USANG2225419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bf9c29434e2198bb503946890eb55aacbc02c262be023b13641ed2dd89fc72. 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/USANG2218500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9011f249ce0806e938a73dd3121d607b74bc6da31d261c19967ef0537f32cbc2. 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/NLX9G2200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd2948dbc2eab3f503fb13e294db7b0b1dc5f719a81887965638f9c1ccc00b8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USANG2201282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7387d421b4082fbd8297e7efa5841e56cd037212ed55827027bd97aced52210b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US3DF2297230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cee796aa2eb2ee1053b72a9e0b37cbd58a63770722b168a67b10f356ec55934. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US3DF2273281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f13338c0ee34bba532c9c28586ed75d25693f8cb4ee9eb324b860ea6ab4523b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2274711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda71bad9cb29775e27173c3a698a166348b6f21b2da9f4d176dcc61314cba30. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US3DF2258460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea013fda7436dddf0d1e0ece4bd6b5dd781c76b499ce6d52693300862e86e2f. 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/US3DF2248448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf04c832e93c77dec2ab71d5bc048cdb96e90268ac67ce69407930fab1c810d. 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/NL4YD2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad45c0a64b6632266fca9ba84e1802b92bfd22ed7a230df49bfcd1d53964ca03. 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/US3DF2248199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a24214cf203ec4a3a719d08031d3dd6cf26310e89bd41cd695bb05fb09a7f7c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2236704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187125a50278ca83aac025a454ab643861eba3debd7764b7126bbe5b6a43193d. 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/QZDA72254849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ec473d46db44a290b25264cf8195a02087513bc14ba9040b939b533a053f4f. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/US3DF2210093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4ff9b4ee966049353e0fcfb3b01c2e4d527f615c2adb98c2dc2107c5a11b4e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEQ022117072.