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 0xf95514d82328f69e32bb501517839aef6bf05326bf70b979cbe9cd14c73626f7. 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/f8f60e1c-1728-4d01-83f2-02dcac4edb29.json and https://artists.proofprofile.net/proofs/artist/f8f60e1c-1728-4d01-83f2-02dcac4edb29.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ioanna Georgakopoulou / The Soul of Rempetiko song / The Best Greek Popular Songs / Recordings 1946-1950
Kato Sto Pasalimani (1940-1954 78 Rpm Recordings)
The Complete 78 Rpm Recordings 1939-1956, Vol. 1 (1939-1947)
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 0x50a2fa15c068c7e08e698a4282717b27435ad814e2858369a4d54d1b66a63904. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:55:05Z), 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/GBLPF0289642.
The Complete 78 Rpm Recordings 1939-1956, Vol. 4 (1950-1956)
The Complete 78 Rpm Recordings 1939-1956, Vol. 2 (1947-1948)
The Complete 78 Rpm Recordings 1939-1956, Vol. 3 (1948-1950)
Ioanna Georgakopoulou / The Soul of Rempetiko Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b63c86ba09434e16b6ba0a5392368b0b24d009c0a321b4fa3ff6057c0e2f0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:43:01Z), 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/CA5KR2331698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f98bf0f13b602a91fe3f6f13b5cdf1fe3d0c6ddd2b7d294bf2114b48d615109. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:45:31Z), 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/CA5KR2331704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d4fbe43d2dfa125b801b6288b5251c271910e2c5406e430fbe56ce6f89c1c6. 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/GRE014600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b17655bda0c6f30f6b3eff65859cb29b9dacf91904e76cd5ce70c1371374bc. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:27:15Z), 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/GRE015000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79061975a60cdbf69f4b2e0fbfceff86a8718677f1499a06c19b44192171c5c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GRE014700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019ce7f02d1013808347af38e7ecc2486c8336708c2dc65e216d6e0bbac52380. 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/GRE014600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4a289155f8e1b7c2c36a6e0323e39152cdfe0900737229a40a7b743051031f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GRE014700170.
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 0x3dd765d7cd024c2dab6af36f690a1e2887cf607768dc8e63f8e73b4d4329b584. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GRE015100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4886392241ad5e7bd92263b7a84cc3df051fe501d22ce09d07a57b986210d865. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GRM019200489.