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 0x584ccc68c6f5aa7bc9424b36e6b517cb768e936aa803631bdb9b32bdc6b2369f. 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/15579f17-3e52-437b-93ff-4b1feb1a6a72.json and https://artists.proofprofile.net/proofs/artist/15579f17-3e52-437b-93ff-4b1feb1a6a72.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 0x94d3bf5791bb5ffd45aeb30e0463807e0a098c4f9c2c6863eb69f413f781947a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZFZ22091029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e056cb836ca1e79ebebea5f9a91439089f263c88336852163d6a627b4a48ed9. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZFZ22091031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f3e43d584732525c77a4c8bce30ca8ed0da9bbea745821bf1db60523ec33ab. 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/FXQ692100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60671311863c157893c23ca113db770b42b8c745d80efbf5415ae826336e0008. 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/FXQ692200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8234b1173ea2165cbdc809d06f4404e9e40f1be72d5d4e7044e46e048df7b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZHN72393722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae14a392fb087ba9ced3ab28763f07f0d4752faeb232ec48cab20b9e24a89f8. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTB52317157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b4533086d984d4ef974d288a0de061f63d19ac6b5bc2a5d1f339f8ecabea81. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZS642271884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f30434d6c1fd9236a316b00a60d469a5a3a575820d24ed59435b30e4f7f0bf6. 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/QZDA72456516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c2bb2fb3852277e5db9e05761b7aee4e5bf58143494d88c789588797b4490a. 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/FXQ692400073.
La danse des méduses bleues (octo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f7aaf31b9f543dd82c9914ce1e9b9a4a26891a43be8f2192efe8388204b371. 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/QZZ7W2431685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e2068b11e0305b623ecdbc5ba1cc96f6fe9c7386208072717e469789867760. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZDA82544272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a86fe55c9ecd86c2d31b6e866d412ec0908857df562a54ac29e0dda4eff81. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/SE6XY2555158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9daa264e32efb4a08eef7933704e72cc5c05db59cf9ff0e9cf5ea9f26975b7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTAZ2530680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51875a60286351952169c85fad77ce6f2fd27711e07b14c59c0d21fda7f9c1c4. 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/QZTBF2526161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65517eeacf61b7a9e41e0ef6e725a69f37e8b3f15c1c012b10f2b7d0efbc03b4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTBF2526162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1d6dd9b92a99240486328562f4dd3a24d3477c5fc17a750e958f3b74f85b67. 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/QZJRC2575938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c4357b92b1cf4ea002d75c45ade09e2c75460b8428a970cff27b78d75ada1. 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/QZK6N2433403.