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 0x1e0437f7ac7a1b9bc10119971e1168639fa84b698d9e5af9749814ea42eab13c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb6de84d-c87c-44cb-a828-4c030ef3e23a.json and https://artists.proofprofile.net/proofs/artist/eb6de84d-c87c-44cb-a828-4c030ef3e23a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Heinzels - Rückkehr der Heinzelmännchen (Das Original-Hörspiel zum Kinofilm)
Die Heinzels - Neue Mützen neue Mission (Das Original-Hörspiel zum Kinofilm)
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 0x0ba172000e513bcea3791e81bf5b55faa2cac7c259a98d9575cc519667400603. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/DEH822409206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f3592f421e0c0bb8f4c7b1f234b27cacd8480622f7bc96738f686da7b75061. 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/DEH822409207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976a8779da119b672a95c2b145759f94babc662f703160fabb3bc7ee20fb247b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEH822409208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693262f49bbe87e304b399d66ca6b8bbd379bd6642bd8edb458b227fe0ac2c4a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEH822409209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bb02a3581fb04f397ce3a565d8d10044afce14b8dc44bfa1781458ee2350b6. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/DEH822409210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a08515efdb7222d6e348f431a2c1a31e58901cc2af44d9534db958db321ea4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEH822409211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f399ee5cd6387ecdccc12b8d889e138df33603373c3609891b844f80f5e089. 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/DEH822409212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed69e9a903f3e3b27479287e62b61e867c3b79b40d0231d17b3a629779a64a15. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/DEH822409213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8e8969bad8e6d77c02b46b2f248ee2c19aab10ca6bab217f7d6a9eb88b37ae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEH822409214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7220f5da6510163ec1c103135dd596dc98d185981547687df0288e6401dba049. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEH822409215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430776914314117d1262c5f894768e18fc9f3caa02b6d39097d3de50f54c435. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEH822409216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e44be3bc45339cbb6603bbd163ce486a4c92c0ec32b5620980ddc85acb026a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEH822409217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea937c2a60c57deb186dd550f57a29131a5271680b985a0689bd252bbb83fe1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEH822409218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba19a81c2bb66a9468745006b6853dfd32d9049784112e44ccb53ae10a984c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEH822409219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed23229c0c615785f7acc4c4c0bf13ea6cde48309fd75af822079d88aaa7f1d6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEH822409220.