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 0xbae665f39d78b4ca99b799ae79e481d35c0d0a3063cac9ed49b80ce7a26ac9fb. 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/3f8e83a6-f044-4f7f-91b6-7e696f57a54d.json and https://artists.proofprofile.net/proofs/artist/3f8e83a6-f044-4f7f-91b6-7e696f57a54d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Emo-Strings, Vol. 1 (Musik aus der RTL Sendung Vermisst)
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 0xdd487e98393b756a72c56a60f9d6bab1a5c41d0243bc5bae125455c161f60f6f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEHK12200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367a5eb41044c48f09cbe62b4174f1e5acc470ec2a251399abf6d00fb2328328. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEHK12300848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6399c089a6e38863806e24e718705a155c65ba70305c6544332169ae6f9579f5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEHK12300867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83656bffc6e861c573271e5e3b8576af01b8f4b08af59859c68056f694f1c90. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEHK12300870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520d43bb0494873d8c0b56ea607a3bf56836871060858447269b74a24c134da0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEHK12400885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f5689de1035b166cf6c8d50fa975e68ca5d9184a8e949ff4e33945285764d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEHK12400888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57210e9ecdc364288c4df799c38884ff97bb89056f39b588b70123aa8de5b33f. 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/DEHK12400894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ab0630aca64f051562d05831e802037a8d298b0553582cdce3b043da3345d8. 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/DEHK12500938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b12586c449658efd277be1045105a6356100b8a2f6ba69e4ba29fc5dda3dc. 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/DEHK12500941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3603a33d09f0bdcfc12da57245d07a0de84fdebb794ef74a94b06f0bb84cbf. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEHK12500945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050231336e1e5004b8bd8fc8f1fcc6550a0800ba7fc3e32bac12a1171bfe7607. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:47:19Z), 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/DEHK12500954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ad3a615b295fe0d3ba0297d8a4ab2aaf40292018fd0c03d9cad589345e97f. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:07:29Z), 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/DEHK12500967.