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 0x329a50a693b2ae7415051a1d6a2b6f8805451025277e106252c5938a123f4c4a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28c0e76c-074e-42be-9f74-8c90f5d665c5.json and https://artists.proofprofile.net/proofs/artist/28c0e76c-074e-42be-9f74-8c90f5d665c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Snowhite (Original Motion Picture Soundtrack)
Der Mann mit dem Lachen (Original Cast Dresden 2019)
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 0x374f7e46e4355ae4fce0a6d93cfa9cf0d557dd49c8a1f0b257bdb34215c6d8f3. 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/DELK42200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacba0437de94978f878af814df46cec584001b876717e44ddad3a1545c2e2b72. 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/DELK42200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f8356df2a7c032d70631b252c9e4749f21bf39ca3f8f38cf2ffcc9095b6a05. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DELK42200168.
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 0x9a2e4c58beb7b754d7abc0b041384362ece72ecd81d1cc78a5314ee4767757e1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DELK42400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bcd910c4ad2cb848d7a6d6b04b8ca8dc8fe8061c0197daf2e9304ee666c126. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DELK42400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7fdfdc0cc58b9ea3ed3894a89f908ca2afe1be5211fd06df133d767cba471c. 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/DELK42400014.
Seele für Seele (From the Musical 'Freischütz')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b36438e8332218cc75f77ccc55f1e4600d429d2181dc597c6e0ecea8b5e19. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DELK42500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e1661f612207f827c54eb50ca8f96050acccaf8b4d377207166d40cb5d0e3d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELK42500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cb8a3b22d4bad2bacb1ad3a950060b95780b30683a0055c4956e807d0923b8. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DELK42500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8f443ae03855f3702062d3a6cfd81c5f621e8d38b0f6a4be85723d37391337. 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/DELK42500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a4235ea42c4cb158c949a69cdb4c79d60363b7c5b445a45bd9aae023247374. 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/DELK42500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2348dd156096db7e8b70904e0a3e6a4feb82169a15e9df06318ee5714192d77e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:22:42Z), 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/DELK42500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f42b426842351293abfc81fdef4d8320ccdbd788960e8757d7bda1f4b101623. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DELK42500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c859c2f21e70d91234d23b8d386f23942bc687f76240f27f07a93fa2c3ab778. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/DELK42500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930e1f5acebd2b5fb27a0f7fab0061fdc9cef3eb2f02565ff46852c9d77121b1. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DELK42500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f7ad68e8f4ab5dcb26b70d4b5837f5f3cabf416b0f2d911eb3f017a1d2f91d. 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/DELK42500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b086c2326c1d4ceecb9875aa1061ff96cb680059ee6515dc275634f2143e44c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DELK42500013.