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 0xfffb8dfc135121911c7ce08dfd4fb0b8db3596af156127287886ca95a04d167a. 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/ac9df3c7-0420-41f4-98af-b92683aca8bf.json and https://artists.proofprofile.net/proofs/artist/ac9df3c7-0420-41f4-98af-b92683aca8bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
"Wichtel - Wolken - Wunderland" (Die schönsten deutschen Schlaflieder für Kinder)
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 0x09888dffef24605005e2c321d1d2ae8d1c9c401eb200d767cb89c205b96cb97e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEZK92000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f29f7b4eaee6fe0ada3c13802b1e94aa1b4bb42aa1cdec34e591d364484e67. 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/DEZK92000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342399d790bfa199e6ea9c4b40dbc7ff7a7a98b8d9868441e9d3b3c22d3ec124. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEZK92000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cd98fbf9be8f567bdf1102e1139bffe343cddbe508faa89187e8fcab8d3d70. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZK92000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44822e0cd80844a7cdae44dd83eded1b9f04b2a8b34a0f0a9d6630eced7e3efb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DEZK92000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9793e93b64b566b6f0fad66dd6908b0e50a6a984f4c624f6f535cfdc918a50. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DEZK92000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf179f16dc864dc66a0645486468921d2ed8e783f276e5fad94cd0cc5700e7acf. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DEZK92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88536ebae94742379f2a20dbe21ea870181f917ef0a9cf27d0e18d382c69413f. 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/DEZK92000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53fdbcfadb57fdfcb34b599b78c5d69e10b353904df17cc515e170022f94168. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEZK92000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b6360f0943771a1122ebfe7153aa18b816f8ad2021e258ee26869b365d464a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEZK92000013.
Schlaf Baby schlaf (Das grösste Abenteuer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c3779a6e878e7535ad219aab3154e0fcc19b2ce7f2409d134407e3dd1d5de8. 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/DEZK92000015.
Tinas Kinderlieder (Spielen - Tanzen - Mitsingen)