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 0x4600821b5a2de10bd5c5b1dc650f03592529dcba430464eeb6708ed088662d35. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9416ccc4-257e-4ab4-84d9-aa0bfe50241e.json and https://artists.proofprofile.net/proofs/artist/9416ccc4-257e-4ab4-84d9-aa0bfe50241e.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 0x52cfd4496e9f498d5c0ee93d673d6973a09f7e2635fb88af17d8f2d071652ee7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ72289970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299991f1dfca9cb1926e86deb0621dad2786593d65cb89d8caf19035d6295493. 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/QZFZ72289974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62a26c6fadcd2c602a577c4107b80ba0a02d7461fe1df7c52f34a8dd8c97f37. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZFZ72289971.
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 0xa820e6404836f52b465081cd636011b9c2b6a27626f31fd64c2893905ca7c8eb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ72289973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8dc6387498abfeab93e119a3e6eb8174f7fcf1fae8415e88682d98f9b9bd7d. 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/DEUC71500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347f3b41407f8e7f02aaa4f4cc6a7dfcb114c43a41304e75a637753db2cf253. 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/DEUC71500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ebf19ffa28402dcb70902a321ac07f77219d5f7c08e4abdc8e2c13e16243de. 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/DEDE31513001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525998324128faf417b84073baf8e0d2ab6af692e51c69c5eb914dfea894f78. 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/DEDE31513004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7889e848ce1ae28b92cd2af329443d9e8b60e7e2bb97356fdbfdf83fe383442b. 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/DEDE31513006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ec632502666d2b749e574a3cb43f03b6d1efed0a4175732ba10b631514576c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEDE31513008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc817362ab92e2342d52f438700ccbbbe66dd4583e581d0304c6b232a47593046. 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/DEDE31513009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f60214bea6376857fa4d3d4389e355982fa76d780efbd3b14d96c8d4f712fe. 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/DEDE31513011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2359425b493ef714010376fb4733bd06a0d94bb3a31121af6b543cba3af374e6. 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/DEDE31513020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddf34776dde94a7f2435c6daadaa52f55b88a17cc412d6f6848f7cff3f7b95e. 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/DEDE31513023.
Die Geschichten von Volxsturm (Akkorde unserer Jugend)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985d2fe43fe7e01f936c182a6294db082c257b6f596376484b834627b489e104. 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/DEDE31819501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bac1a604d1e70464d4b15902d05a115b4aaf30373b9deda2d4621549dcf33cb. 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/DEDE31819502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f7468d9cc3e1e76f1e0492cfa2ea85211a337a502e9e3cc41e3c4feed9511. 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/DEDE31819504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c194e510b9aa50d96a4e43225a5f181ecc33cc97e59873d8e804a9370647ee. 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/DEDE31819506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda54f980931ea9cf1419932246b050dabe6d94070d48295a5608919bd51f630c. 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/DEDE31819507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3190c9fcf4515cd1152c3ba29c5e983c93103f94d0fa88562d58457e96a1366. 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/DEDE31819511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81600bba9ac108f257e2847086de1b467d1434f9c8a4aed53d3fbc229508b4d7. 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/DEDE31819513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c42717bd81597369545563dc846047840887fe4bc2771842a92aa150056821b. 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/DEDE31819514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82f17ccb94bc9d6004cace24b32e850a22cf67f9d4b9b9c81669affe05ed37b. 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/DEDE31819516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41db599c2ccd5b6ad74ff31d5cc891383b27db324a94d00da1cb1e4e029293e5. 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/DEDE31819517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1dcd071604dae348ab3f36f946d2fe87caf3c3e9926c11e8327e6227a634b. 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/DEDE31819519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adfc27aab4a6d91a72a613dc6f209c97958da7b7a66b1fa24ebac985791986f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEDE31819503.