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 0x31a62f9e10eb83791f02928868ee25c5cd90a50f5fda3e668a347719acadf5a6. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a731df90-f83f-4980-8711-0f3fdd07e529.json and https://artists.proofprofile.net/proofs/artist/a731df90-f83f-4980-8711-0f3fdd07e529.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Leonard Cohen in deutscher Sprache - Poem
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 0xb10f57c34d16798e3f1fb4d0e3e803a0f0ad5076c7594fdd00d4025299ea4905. 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/DEE861400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6724f5c52472ad0703ade64e3cd65718fc3851f13d674e6d8891e3ece2fc4e67. 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/DEE861400366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ee2bcacf8af7b2582b6b5d115fe3db67e0b9386bfa259e06fb1c0ba47d8901. 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/DEE861400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3696884689832ea276cdf707f4b5ddedbff0c1f7b829cda8f44716c4e3b9724. 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/DEE861400370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb8c14a29d32ffd40d63bd1007837eba85dcac053aee41f7a2bd65e261848ab. 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/DEE861400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9156ff2486850e067afdc9454a504323bbf31965fbf62c9f2a9b356dab2febb5. 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/DEE861400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313d59f835fd4b2d036442fe07a9f6f8e55f7680d64e969bbc5fb16570f52427. 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/DEE861400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c8c63236536b8685bdf40afa991f95b3242728bea26f6fae1e2a0ba40d66c5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEE861400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23bab7c9379280cd5e153fd77a4a82bd2ed77ec42d81054ae4b97b30f7e72b6. 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/DEE861400377.
Lieder Fest (SWR Lieder Besten Liste Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0bce5deafdfe4f2d3b15aeb56ff1170de9b425d0b20dcbed4bedee77859b15. 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/DEF810645004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cb05978c88f863bf6d7c3e81be70c2feab5ca722a0f379cbcdf6e7b4f8e3f2. 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/DEX242200032.
Live At Rockpalast (Live, Hamburg, 1985)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb405cae9410aba95fd07dd96fecdc53ffa3c5d0db2354b2bcdc8a55f20c90a8e. 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/NLB638600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc740d1161f9e6a5476a3d1dfca8ae48ac30809c63e5f933952c982888db0bca1. 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/ES5118600425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d2b2b6aa36ef13f212d2035300d3a551b77fdc4ebdbe83bf99b900bb12f0e3. 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/ES5118600067.
Kleines Unendliches Gedicht (Pequeño Poema Infinito)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cbc41bf1367d0b23f81a0042c6ef49f2f8c92ab7349fd12fc85f4b84d60585. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES5118600009.
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
Nur Meine Lieder: Weggefährten und Liedgenossen singen Christof Stählin
10 Jahre Reformbühne Heim & Welt (Die historischen Tondokumente)