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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b8a252dfae469cf4d4668db9ee5b59891b40555df57129160fb28954c09700. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68ec4edc-408f-4edc-9b00-5617467143b0.json and https://artists.proofprofile.net/proofs/artist/68ec4edc-408f-4edc-9b00-5617467143b0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e68f867a670106ac0172bb614c9b2bfd64877af00ad77a06d7f9a3fc6f806b. 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/FRX872410857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d2774b77170c126c7d596893084a220e7a5a4145f78625aec8f06a5be27db1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX872410858.
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 0xf7d422dffe60d61d6d2dc76092aeb100bafe7e714a1820838ecd07e6625ffe94. 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/DGA0R2317113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5d62d1ce8efc08e98cf8ccb65bd002fc239cd7079462e885af1baa2ebc9be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:51:31Z), 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/DGA0M2332784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98f3f1eaf82489af31e94cd0123741c5cbf81a6eb3ef7e84c073944bbe0838e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0M2332785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228c0feb352b229746b4523d4ad22b1ec66af0cc4fff7661b913ef3adc18c17. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DGA0M2332786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f20fe03f1bef96be32088847acca3fd20824b3a5d7404113ed5b11a6f6c69. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DGA0M2332787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf146f8550a2b14125626059bf553bbbd3515fa949809982ae0d7c7fd30d4d0d. 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/DGA092398558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb073011d3aff5c5c256bd701672b3cc36db90126e6eabd3edd44e9be074b395. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA092398559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9651b4342e706b30ee24b42921a093137aed35e8020d9d0a06ba5c943e537bcf. 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/DGA092359918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a53cfb0942dfe2c10499d647bdd44bfc958225b58ee6a7866ab0b718d04718b. 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/DGA052379032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24034b4387831f153d3dc47d45bcbaa421eb5b1a2bb6566cb0be7db6f602f435. 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/DGA052379033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e680ab5eaad9c9854d52135c058ae233f56ca2cda0920ab23356d1648bc67f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX452308421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cec0897dd12f83f50446a413c72af04969c85fc1899d9d83f21db1ccd9f80f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX452308422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4111e1df50609cdcc082fd842655e02cde7f502465f36c3c25a6720652bd88. 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/FR59R2354852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d4bff27a803a855bcd76288d87c7bbd938a0b9cf2dd94b20a3761d398e872. 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/FR59R2314077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ab6d7cf53892cba0c7f98ed58b9e68828d980f0c643e1866f29ef6b904c137. 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/FR59R2314076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22b979d338426f9ab6f69a0cea4fc32ea6914dfbb2a54a2315ffcb9be9d765. 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/HKG732246251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f98ee68a21a64a5c1f2ec76922eef761937a7b88b9f052d4e7313dcecc526b. 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/HKG732246252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1be76753a87ad36a162f3b7dd30d688ee0fef75516bbfac9c7e25a2ec399fe. 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/HKG732238183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf82384f527d7e06431baf60e047334cdac822ff87c74aecd9ea1984d1343ef. 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/HKG732238184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ea55fa22b76b93ac46a0adbb58116b627c8ecd2c645de3724ad5d05dcc69e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732232176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29713f96d01d5a6f9ca2c0cdf94b87e5a5121ca4204af8a8e6288a0970ce9a94. 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/HKG732232201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6303b8ef4254ee320bfdf986803b4c4cd4bf3ac523fca0dbff68f6c7ddbb69c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732228604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c833243c1b7a4845dbd6298591adc8d16f39f60fd085d672735ba660f6d2cb. 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/HKG732228605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41afbf2e32271c978246b1515fe41e58556d9b1bf9934bdbc6aa311baf873618. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732225174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9b8bf12efe06e4ef191e04cdb3697862cd2289c66fb6839e810ccfb284f21. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HKG732225175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b61740363c7043cb7b254fa7eabbdb5728ed7b7d557a1583c3b503036c9fef. 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/HKG732292230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525b885858f67ca69ba23abc738c49c57ce6534a8556821fb2e41f7ffba4e1c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HKG732292231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1362870a05d7aec2bdc22a7362f111dfb0ce3b090da6030e30d19498acad503. 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/HKG732292233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0f3cb427ae14b6ec14f88513e75f3716ee5f168f5f6f251caf38043eb92fba. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKG732292232.