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 0x7883d501d2f329ecd2bcc74745262937e9e899bc8b213b6e60fe0344b70e9b1e. 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/12aa8bc5-70cb-4976-95a2-a75e2f89e030.json and https://artists.proofprofile.net/proofs/artist/12aa8bc5-70cb-4976-95a2-a75e2f89e030.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 0x0c3bb5d23d48748a4260c9654ecca4ab7e7c4daef5e94d97b4a985828d5cef75. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USB750400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc2b7ae9a3cc8c96ff847b7b5717d3a908d99064a6ebff80987a2503a44dbf4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USB750400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3967e0939288a6d09d5fff652f52cb01ca3c43582a83c2ba8f8c30e2e1c0b0ac. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USB750400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f05e2636d944de3c1f509c988463834cbeee655c4cce13bae015dad0fb67d3. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USB750512302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85781ec4fe50b03a6de0318452abe33879539f3e389cb309b45316a8b379a11. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABT1427946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef4c82e990ab75b0cf328ebd59ece58265f57d20bae2400f064368017416ffb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USV291458316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1d1443d411a6fddc6e3e1c789a7d6cf6eef84ba4c1ca0e95291ee3e03bfb2b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USV291458317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c920a346fa5c020734da2e4b3dd6f68c5e0e5177e4196d7e79f088129f981. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USV291458318.
Run Away and You'll Never Feel This Way Again
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb316c707052f8693f1847a0ff2f923d404513fbe672d17358258b7b29c8be21. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USV291458321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504433d286372f56e69781c46aa44fe48f93df0faa308412712ec7caafd9b5f1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USV291458323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce5ccd7ef57d50e5f17949623c27ae784118435b749631193c94a638fb7ff92. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMBZ91927251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f63eb704b8cccc2052f1b8ba12f8f3e52a5a96b768550be66f6b2b0b273536. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMBZ91927252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee623b7740b461f154aa7a78c68f2ddad477946d8beeacae8bf526a49f7cb7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMBZ91927253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6acc04608218c925f68670bf368a316c9f18d793613956e9009857ae8ff849. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMBZ91927255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e080d762098d696cbeb1a8751b27797efe9e0f3b69cb182a1821e11faf92673. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QMBZ91927256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586aa45bfde52b34472107f7af7ed9281c5e94b90aa245ccbadae5ba3dbc2583. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QM4TX2194929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d31a43e60c05f94ac35f95dbb1b087da8ca20ef918f3199134c2b6a3902960a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TX2252194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d23d80705d8265dc3416727b91c404a3fece8c06d7307672acd91aad5548a0. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QM4TX2252222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6806876250e6c44d380f00299ed46056c7b0f2d161bdc716b63f7d866edd26f6. 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/USA560525921.