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 0x5cb006eda96a14afd1b156ce3ad8094795501cb30799ece7a8ab594047be50bd. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e184febd-ab3a-4388-8e26-00708bcbf174.json and https://artists.proofprofile.net/proofs/artist/e184febd-ab3a-4388-8e26-00708bcbf174.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Willi Deutschmann: Eiswagen und Seeteufel
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 0xb9d22faffad7089766e45ca0ce4ee4572cabcb8fb64d3424dd3ca2e3c50a58df. 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/DED431109200.
Die Bekloppten und Bescheurten - Eine Lesung aus dem deutschen Alltag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1da68bd21633b86f6f277c5a52d73457a170e12719474ddc4e13ddf4093116c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DED430303200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7842223bc96641fda51b0517ec02b6289cd306c3013256719631257fde29f870. 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/DED439510700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a2337182dfea79fb04bee03baa9fadd9f67acc9e7cb907f0b5a553bac1df6d. 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/DED439511000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4609fcab121db1d7bc5cf43025fc31a3d4715b907edb147542ba814c270894. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DED439511200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c5a77d382ed8545b6f7ed2f3546ae8eddd8fada05ece2f6d1a716f8020639b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:23Z), 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/DED430302400.
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 0x5dae11809551f155234dce7b48ef6a29f2619af9f5844651270d9f565615e560. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DED430303700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7ea8fb685d9c037b234e548d774c821539e99255635a55591c919410778b69. 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/DED431107800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a318c51c3ba0951d525ea2538fb569a1a84fddbfc5894c55e2a9de3e75d7e0. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DED430091400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed01277a199fdf9339b6e6222e70b3b937e30c8525151a4be430360d2f73bdd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DED430092100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fed5b61b91dfcee44e04ae3f27634bbb0e26a14b0dcd7b39f1bcce36c68571a. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/DED430304500.
Deutschbuch - Die Bekloppten & Bescheuerten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65452181bd93f9d5f17da2ce869829b597274d31571cdab6d1e91ef4815509c2. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DED430510700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b77eb6bfc39d3085c44eefca215211ec3dcc4c677e9eb68dcf87ef4b0c4ec5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DED430511700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bac40aba11420d75bff39b10d166a548819b9b731ef45c21ec48dd65f3d4d16. 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/DED430109200.
Logbuch Das Paradies der Bekloppten und Bescheuerten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204a8f80aa09b4cc40b40c0eaf15ee223290f3cbfa2af73b0e5775171711a7e. 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/DED430100600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf896d70134e982640a3ea5fdfc89d9b1a3e68fafeecd906e444c5983fc8e012d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DED430101200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec861c093d5f1ef4611afd7a40bf6bb4750d8e493772a13e610bbe534a35a32. 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/DED430101900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c82f780e57474fac16f63a7a0737359c47fbcc758461bbcd0de1e13a5a1dad. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DED430102900.
Logbuch - Eine Reise durch das Land der Bekloppten und Bescheuerten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14c6a63bb06aecbb29bfd541f7b03de892f8a4def5485b298ac3137a8ff631b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DED439807900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87cabb162970119cfd8e71575fbe4eba790ce37ae54ec898e3ef8be6f590707. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DED439511700.