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 0x93f59e9094549ad0be4be89a8804e769a47edc56850d79527fc618b43e480515. 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/d4c48c68-3fae-43d2-8d93-2dcba1ea30b3.json and https://artists.proofprofile.net/proofs/artist/d4c48c68-3fae-43d2-8d93-2dcba1ea30b3.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 0x29e6bf9923c4d54276db1f97ffe442b3451d43365ba2aba98aa964df12a80b4d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA062046617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae02a355c514fb21d67a56b119e05359d62ca6559608b56bbc22a26587e9e4a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DGA062046618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d94bf70523528eda5c544bb1d11a54cdb8294bfac997fc32c890c377506d55b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA062046619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b181032eb4557ec1ec54c7df908179b9bbdec12853614f04d2d6f9c3c645b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA062046620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981b55b6f93633a983c6c9f0934a337ce5baa1c4f9f970bc822321aa198a48ae. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/DGA062046622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab022e1a80647cac2ed2ed303a71732a3528d77a983a960e5d958e00d7c7caf. 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/DGA062046624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef4059850f46f3776505207e27615550fe13a0854309f8ef9edd1c316f11bdb. 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/FR2X41818920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d8543f1fe89fe663168c3a8ce4a5d5c9470800dd3a7187f06c0e2bde000928. 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/FR2X41818921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bea3c0c04976ad47c75499ed5eac0f066d09d7319d27c60f273dd7abc5a98b. 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/FR2X41818922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d70dc77b7b24c8133d41674e56530485a73a600a68e774ff6e730e6d2f602b. 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/FR2X41818924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c906a96eff11f6e81ecfae82923476a90a27bd9eae701ae5c0303335e7c8ca. 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/FR2X41818925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e51638ef6b9c390377bc374b7932b7275c23476c7219fa6fd89d37825426a. 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/FR2X41818927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff639d724dc4752f3e29502216796172d49d90a38716aea01603dff04b05dab. 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/FR2X41818928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df2ab7b4d393dc7e376a9caff2aad6f783fbb9355d953e9d700aa58958c5ca. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR2X41818923.
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 0x4242968f06bc13b1924f4ce5f9d4f8343ef26387af35854ac6c9570f216ef3b6. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR2X41818926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaf48b5d06ab01957d4b23c7edfd61c66ebfb3107205c4cc26f741aa0287fbc. 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/FR59R1911159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9255b62605b8ad9f3b25086f7646f7232bed7b6558954d423bbfa6d8ff5daf4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:32Z), 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/DGA072204213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc676f551c973a5c24a524fb455d6763eb2f7afda3c91f62f560db1c7628e71. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/DGA072204214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb58330ae1b9587994ef6b6a5d56dfeda5611d4bedc281f346b30ae45deed96. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA072204216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fc3efcf17e9e5860ed519636b6355f2ee163ac5227e909cb736acaafa8b6dd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA072204217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a23b9e567b2766fe3a35dc69f701dad1cc57fc0d630766b6d2cca4d27fc3ae1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/RUA1D2341977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa79839dddf488b4b9c5b09aca882acc988286b75be637670629f973ae984951. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUA1D2360144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074b26329ac61c12b695198286c2c7238defe67c1e20719c6dfdbf7c760fba4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUAGT2316416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa530f7d81a19d536a622e6476c3807d52efca3e56b028e6c2daaf476c2ad2a89. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/RUAGT2352133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1145a46b56877d0f5efd40b14d3073eeb9e4695d09189d95840982e5ef264c38. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/RUA1D2443168.