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 0xf62e3545a67030227d77f8f59ccc8db5773380b7fbd9cceacd6b772dd50f3b41. 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/15e4f298-0559-4f94-ab30-1c9b2ba4dae2.json and https://artists.proofprofile.net/proofs/artist/15e4f298-0559-4f94-ab30-1c9b2ba4dae2.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 0x270f634c1cdec2a9d73c346e1a0c17e56fbcc1e5613036299042152049da95f2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CHC381600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c4f836f92bc0bd972614a4e6cee0ab7dc9933821052814c43dbe46956720bc. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:05:44Z), 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/CHC381700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf71cf282d06ff8f1e59de3573e3f0b735fcf5b33a21722922674b39ef7880. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CHC381700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5594ee14cdc36269e7fb84f1a4bd18f58341c96ce555022e07c655a11a48d50. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CHC381700261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca6e609552b47ea029e8f3459604b5039eef3cbf064241abe1fd3f79927f6d2. 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/CHC381700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9d07a6dc85f24d0e441f00c16e833df60a373f17e4aa5bc111126bc5cbd3a4. 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/CHC382100119.
Ready For The Ride - aus "Sing meinen Song, Vol. 5"
Sing meinen Song - Das Schweizer Tauschkonzert, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3594ca9503eba338cb9720db58c333e5e9e7673ae42f3ed787d0722535bf4df5. 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/CH0832400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe893e5ba268272a6a3f69a3e67bb5ce13644ab1175795991a3d1a38b42fa8e4. 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/CH0832400390.
Plan B - Duett Version, aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bb38b01819712fa977fe1a45244e211f4aed46cd00cf350608787343d92028. 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/CH0832400470.
Du Träumst Nur - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e64d75fa6cc6e15143fb190163690ec1a7419ae817b620c060d5f34e628b33. 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/CH0832400340.
Remember Me - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1f673dd378562a2504be4b37fa066867c988f87e47a6ab87114981942fc23c. 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/CH0832400240.
Hideaway - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ffa1a784fd936c214195983347be11e1972050223ae5fdc047811c5644a96e. 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/CH0832400150.
365 - Duett Version, aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb872b748a12023afa225818d9fa00d7f7b979043ca208e31b13fc5c3245cac3. 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/CH0832400480.
Chli Hmm Ha - aus "Sing meinen Song, Vol. 5"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bffa0507055aa7b16dc6e46bc823fcbe57c20d5750275a4b6f721de6576b2b7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH0832400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d575182df8982be6a326c1035167ff5b27b7602aaa10cb3f1de8b62b625b19. 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/CH0011700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79196698b9bf7d2cc5e29b89c08203b5626a6407c79e49b4bc61a4e041267a48. 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/CHUM71900122.