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 0x96cb1f9b2790c35dfaa1a2a24956eb622663d982dc48e5c2a35940e0189ba0c8. 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/08aa668f-e1a6-41e6-af7f-81ba9d58d350.json and https://artists.proofprofile.net/proofs/artist/08aa668f-e1a6-41e6-af7f-81ba9d58d350.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 0x7e9126c60e80edf3185afb896dd7921028c9261a1b33f040398fd2d6b9f1e88a. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEA621300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460656acc087d4726ab412c38dd9204ea28d60dcc529ceaeab0e34e22ed9df7e. 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/DEA621300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4cfd0a2a9a389c39d287a4142bd8b9d1f282e8d85ef127c0327da79d447048. 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/DEA621300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14da7aa335de9fd50d52122a6d88276123a29df6ac86831d3b99998c165fffbf. 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/DEA621300235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d25076d02475ceaf5de9851f5b74fc9b0fff7975788acc3b8b3563a1d1f5925. 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/DEA621300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ae12dc514d3e4400dde6dacb111eef098ead417b3066f0c3cbade7fb7272e. 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/DEA621300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa76457612aa44cb2f00437431db587fbb98e1bd9862bf1eefb30ff1672dd53d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEA621300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b7b11383d2d78bdf82b08a0beeabc50ce3c2696cc60a516d14b673056fa186. 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/DEA621300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dda64500b82dad91cd004ad3eb8b82cc8e4388b307f82ce6db6d158f984b18. 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/DEA621300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188357dd4c25ab303ed55115b22d99d2821f34d561d7041262d3068142852c93. 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/DEA621300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216125797046942d6daf6640ed93a2e46596f5eddec778f68fe5b43ab65ffeeb. 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/DEA621300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9569e76e49e3f6eedde266effc066e54c121d9ac5e5a436839727875a5bf00c. 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/DEA621300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4a1ff13b0761a92341985846618ed67e785f65494773f35c84ff60221af245. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEA621300244.
Annabelle - aus "Sing meinen Song - Die schönsten Duette"
Sing meinen Song - Das Schweizer Tauschkonzert, Die schönsten Duette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0445afad760bab2b29b3f262f424973898bbdece0f36bb19eedbc81dcc3699ea. 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/CH0832004980.
Mani Matter Tribute - Und so blybt no sys Lied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f7c097bcd215b6a660492d9da66cf11c6f61a6a26561c28fb058ea00a11252. 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/CH1081600142.
Patina - aus "Sing meinen Song - Die schönsten Duette"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5acd0ac6421222497ca7bc5274380ebc1320f7ca380aa1818f8bffcd7ba4f9f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CH0832004990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f84deb6d7bf8ce23df35baad5f6cc55cecc1aa53aff87c5e21e2cca84749d10. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/CH2181200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1817a0d58ddc618d3be345a9bf263bbf04c3120bf10a2d4572f6c2e22bae296c. 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/CH0011700199.