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 0x12d20644ab502f82e3e83bc83711601ad12bdb943e4ad2549a6dd31f361f740d. 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/d87f8932-fcdc-470e-90a7-99574a41386a.json and https://artists.proofprofile.net/proofs/artist/d87f8932-fcdc-470e-90a7-99574a41386a.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 0x7307b01765ea2abd5f69a7c9cd683a98a62007d7b214ecabd6674baf862adf0b. 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/DENC11900621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643cd03993c940c61bb15f1177de86184d943be4dfd04cd138187c3c9b5849ca. 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/DENC11900622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373a7de8e0e77b3ff9984be994887db3bfa014cd93cdf3c23c25ba7d5b4156dd. 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/DENC11900623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4268d3b410df56e9040ca888d9ba5e8a6507c964990f786c07c6e12da9e0ff. 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/DENC11900624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f7c33c59d63eefb4833f907251c43c29b2dac504a5487d02cf7d538698bdee. 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/DENC11900625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bfa78db5cacc44246cfea864886200fc3bfbb6fc10b63ce83112c34c1389e1. 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/DENC11900626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9745cc69dabd3b9a6cf686c18aa96cf0e23bf9e03e860b06a90f4ae9cafe6d53. 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/DENC11900627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1289bb92989729c897969e1b9e53a0818019ceab3f60a61e0429cced41891658. 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/DENC11900628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04a955747d8080c3f12438856259bf77b7c2bbb6dec892fa034fd89cedb37dd. 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/DENC11900629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35180ee11e2062c6807a4f6422ac3cca93d8d5e50f1f925937a720ecb1810a63. 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/DENC11000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6919cc083e5744649961b4b18eeb4596d8e791224b617a50b5103c2f688d0a74. 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/DENC11000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aca1c1b01214f47befdd17c76ebac417b7bef3df079023a16c4f4c5242b8e2a. 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/DENC11000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d0416d53e907bc5a7cce1e2254d85edd89c64158f5faa0f3ca66124aaea7e. 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/DENC11000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46904b6b5e0ccba463fe5fe5f3554bef4ce6144d0b9fbcf165fe4fecc7ad434. 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/DENC11000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ff9e3850abd8e5c2641da87e370651744b14d9949dab930c1fe1d826de42fb. 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/DENC11000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7455f3ade7f62fc3dd82ed29105550df5107e6c01b497658518a998621df2a11. 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/DENC11000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6705b8c5c4a41520993fecb8a6cb3a8b38c6b247c8d8c2c2020f3de816ff9624. 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/DENC11000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1dacb63bd4b88ed14cff492e54d07d64e186a93e0d767c7259faf875f27521. 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/DENC11000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4376e8b7eeee07a0b28e0405323bbfdce469fde0a200de22bc3e50787a6da5f. 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/DENC11000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd885510b08e1c2e545dad45be7ab0c587c730a4ef201eecf821ca1196cb7a1c0. 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/DENC11000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b3da70d231b69fd44db3cff438db7b81023bd14bb9f59a9a09d15bf32aa3c. 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/DENC11000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469c0a0a440539789f0f70d59a6267e99aa3efb661a0134104da43878584af4b. 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/DENC12000690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d342d2cbb31262495acbbcd3232f7b2f3794efd4df409ef3c5b33c3ac9cc6b. 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/DENC12000691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8609a218d73defaad6b0305b2b06c12887baf6394dec13e48b911019e714716b. 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/DENC12000692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c6bb58331501a54e712ad6f2a704cc4937a4cf1a527623d54681ac860c70bb. 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/DENC12000693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036cd13bab89a6ba03e96b092e8790de3f4a1fa875777fd6ee97eecf3c9b6761. 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/DENC11900630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383bf326b79ad3d1ec7e3b148797827c15b3c58626d2cb3ca212d74c717fc3d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEM870902701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c844af5ebc9cae6efb85e8a089a0c6c8fd53105acd49ec9697aec36c408d3a4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEM870902702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7921d15c74226d396aadb7401339af16c013d5e253e29133e37fdaf1422ceb4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEM870902703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889dda3948541cc67f42775d1258a9c3b0dd7e200463cdb793ddbc101c18cbce. 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/DEM870902704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86839edff9d13b6e9033b3cdfe73571f034c0479280121726678de11956ed261. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEM870902705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baa50e6c686bd19844255f433d978ba51f34301f1e20a87feac3ae75101da94. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEM870902706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab487bea1070774418b82473880d50be7b41c8d99275fc798c57efe7430dcc. 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/DEM870902709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3038221b7285128cac4b3803992bad253f0bb23c2ea2300983d09c64352b88c2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEM870902712.