thumb|280px|Andromache holding in her lap the urn with Hector's ashes, 2nd-century Roman sarcophagus in the Antonino Salinas Regional Archaeological Museum, Palermo. In Greek mythology, Andromache (;
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 0x0f76be21b0405fb87a621c230cc22397a8234126000c8e6150ae63094c77d7ba. 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/abc7732e-f2f6-425b-9ad5-77aef0ac2171.json and https://artists.proofprofile.net/proofs/artist/abc7732e-f2f6-425b-9ad5-77aef0ac2171.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 0xaedbcad1f99679816453cb941f45fa163a3d28bbaa7f08ff71603cda4edb433d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GRPA11800267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3b9bf71a278f904086176cdd8ed5ad736e332b34fd0ca9acb782b06890a704. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GRPA12000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4031d303fc77c179e07ac284d7570e91ee3a848001a46e07b6ff45a9b2b8db. 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/GRPA12100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce719493a01fc9afef085792bb8aebbb31844ae7a07aadc6a06a8379c46dd4d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GRPA12100418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db362118999054c5b1770b5b699cf0c3db06796657f7a97596e5260272304f4. 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/GRPA12000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c5f3a53c0fb02ad16be3497fa0649c467d8149915705ef0a35b257a79e857. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GRPA11900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b5955bb61c62f19607cdac1fbab1d466d3dd7b81b9ec888710a8b412dc69e4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GRPA11700202.
Ela - Eurovision 2022 - Cyprus / Karaoke Version
Eurovision Song Contest Turin 2022 (Karaoke Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d0f9de0e41d54e8059a27d65f8abeba082181815f2b532c475a93d4edd34a3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DK2DY2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abfa50dd2ed9e317e081413caae5b6aa5a4a77effa3ae3ee88d389164d674d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GRPA12100371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db362118999054c5b1770b5b699cf0c3db06796657f7a97596e5260272304f4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GRPA12000184.