Sabrina Setlur (born 10 January 1974), formerly known as Schwester S., is a German rapper. Her debut was in 1995 under the guidance of 3p Records executive and mentor Moses Pelham, producer of her bre
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 0xef09a85b98dfe08927f713be1f2d67b656a467f55dc09bc80f6e0f06d427fdac. 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/ce7ece57-cc97-4d76-ad10-47b037361440.json and https://artists.proofprofile.net/proofs/artist/ce7ece57-cc97-4d76-ad10-47b037361440.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 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 0x1b57b44cb3c6ff974ec68f10e82568ec3478ef66e03503faea6d7beaed8f8e3a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEP950400886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b117e89bb6d0c30b89c05fc7211f1f4687a544a1e3c313a9041748206e5e3. 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/DEP950400888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ed6e506a537fbafb78e8936e6334505f69306cf9e3fd4957f4ead15b4359a6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEP950400890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cc6a72bd41b50f49090b9b163712ede6af03fd6335034815c20d69142c3e1b. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEP950400895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52172becb73d2fe08dd456e8e2d4f7ab844b7f4dc9631698284d49a8cd2c6f9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEP950400913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679c93cb22eb62b19a81f0cd5abe4d88158e7f93280418d1b4699d7be5af402. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEP950400282.
Freisein introducing Xavier Naidoo - Nachtschicht in der Stadt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c02a5d688609244c885905c7f43435037e24a111ed6f38b951a2f5aa8722e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEP950400924.
Aus der Sicht und mit den Worten von .......
Aus der Sicht und mit den Worten von ....... (Special Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728a43b4a967183a82c09c4e2334a26086d02f733fdabbc583fe660d6ebeccb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEP950400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255e0eb3762ac2716bd54a65762940616b1a3d703a7b1c307301ecab6d7dd3c9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEP950401112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96be90c71c7bd9f2f73b53acca3fc29c5385b32fcf71447ec06b7692ca9a6cb5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEP950400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b8570e5bcd522ca1ff0af37365234800f7cc91313c4dba0c11649f9133120. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEP950401224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a7701ec39603ae703765e609c8afc7b570a30b3d0d6702f6feadda87fc75a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEP950401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b3b8fecaab5a7f8ab1b2915b9a1f27c47fc4adb500b3eef953212ddb63372. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEP950401268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce8c8e7ed0173f5be3bb8057389d824f04e7c954f5d4525444fe02588a67d8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEP950400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b36b522ad542510df36cd54b7c98dac4b25aee6c51903e5504b0ad3aef338c4. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEP950400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd748f457a9ac8088197e296443479726de7a234c171e0bffc1f7ab03e1037d59. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEP950400699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81a7fc7f56647411a844f2aaa6eda4d52fdf1242fd27fc6f429b4d1879a58b6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEP950400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046ab25024cc0a79bf9808c709d1e1e6dbde814866df723e3326ec2216a4130c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEP950400703.