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 0x5a98abc271ff28a93f9ead8ecdbbc88c501e61688e9c7411e8eef149b8805cd9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcd2f4ac-8461-4193-a04b-a0bbacee9aca.json and https://artists.proofprofile.net/proofs/artist/fcd2f4ac-8461-4193-a04b-a0bbacee9aca.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 0xc5c6ef6833f1a9e889b36347fb8c921ceeb8cfef287db52d9bc4139546bbad91. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GX3Q92434435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f043e9aab51fffa90c02338c3c7c7c06339f6458b2657335c2131b46acef00d. 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/GX3Q92434437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d37cb5b7f2c50272b00b106478455efe7d42bb39780fcc0fd42f1ce4d01255. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GX3Q92434438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc46bb06aaa4726cd6859faac50fc9829021329ef3b0e883c06cde81fc359e. 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/GX3Q92434439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61a5798e89b2f677b9b403b496920d3e262b540685bd86e67117bb0faae6a1b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GX3Q92434440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7b05c09328fdda21913eb46d52c6790041070e4bf71ec366d27f434527fd7d. 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/GX3Q92435818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea03a5c750dcc03be651c23cdba23f9d8b2bf68c69bd481f491af0d4064cc702. 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/GX3Q92435819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e11859ead85de49517286b2c508f62e29a643c967abb19bd61179521fabd2a. 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/GX3Q92435820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9061e8171f6e63d580fd40672bc0e917b12abcce92472ee6645066e369ac052d. 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/GX3Q92435821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102921d96e9c45cfe1123f54f0b893baa234117f5c4de6ad1d318a10dabf1164. 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/GX3Q92435822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a73f2be8cfd274261f7eb69b961da02a2d0cc144410d19bc5342807608895b0. 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/GBLFP2415696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec215f4f6585a8af3fda639ff3f005c054e5da58209b2ccdc3f60c422a5ea34d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBLFP2415697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06804b7f716e9d9ba76bf31ae75df20af9ac202dab2663544ae2519419c544dc. 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/GBLFP2415699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8202a216305a6b97b987253be9c63b77e6fa0f8500253651a2fe4af8d0d4c048. 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/GBLFP2415700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718462ca02efbc52f287bb79fb76b883efec77a48b7592218d44fe0c8526feda. 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/GBLFP2415701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dfb33098ffd67bf049e22782b40403374661fd1b762fb86e23f1b770dd5957. 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/GBLFP2415702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474ded3fef36a60d765adfb7b420a3cca9494812208c04524055c1ec109a4b95. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLFP2415708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc19634818c034e67fd80ce558efb0a36f4cef71667d60d221eef37f4b56d36. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBLFP2415706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae7a4cef252d22effab904f0a21ebe57eb8c75b76f84f1c65286adba31701be. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBLFP2415695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2ebc75277af3c2737d69deec3d5d8cf8a4a2c01e631fe4e7e6487c84f72086. 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/GBLFP2414580.