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 0xcf2df148d1f0a5afb61cf5ce7170b4bce77cea6ee449a5d581e7a8567f4632a2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55dd907a-ee9f-4417-a870-31057c173b04.json and https://artists.proofprofile.net/proofs/artist/55dd907a-ee9f-4417-a870-31057c173b04.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 0xdc0f3e8ef770f9e2740858a40b6eaeac0babdc81dec59a0b6cf43f9da60fb355. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GRM019100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceebd32242e10b17fd6132b00dc6a6c5a4449187b3c49ba657a15bca44b7159. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GRM019100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8ea154a38c5cb1e75c0d12bb1303afb085d110c4cb12269a2b8ec17b9e5098. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/GRM019100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2709d2e238109bf3e4909ae4ce014c8d2157e0cc188f4525d6f633bc338ada. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GRM010000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651e01d2811f75d271f287ac44c10ed30ca22bba334e8458d9ef4b564e88911b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GRM010000348.
Kosmos Ki Oneiro Einai Ena (Perilamvanei Kai Ta Tragoudia Tis Enotitas Deltio Eidiseon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da7e7c223a6c35ef5d22a4dd1ea33e98187b9129cae75f2000c6d40bc99d29a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GRM019300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6a2f902af5f46d7fdabac2152b6851d9a0013542596f093553948a040d119. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/GRM019300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb692a3489878420200b058bedbdb3f21d6b8f04b8f45f2aa7aa9370e4eaeb51. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/GRM010200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaef31b3fd3b64db43c2316c5c9187be481ea4b4bfeba0fedf431fb2f100a0b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GRL019400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21a55f6a4de76f0b44a729c2f3139b0df8a5d60d4c54c592bc510986d522784. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GRL019400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99575c7d70ffa20fad63a6fa0b1a7e23c0cd3968b1cc3b9c91cc91100313463c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GRL019400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a680e82b19cf104824466fc5717e86ef135a3c9c53568af7312d668b85875fd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GRL019400121.
I Kathodos Ton Saltimpagkon (Ihografisi Apo To Theatro Vrahon Melina Merkouri)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c9de3152e42c7a8f91c566f2b729362a1c1ab32afa05de476df3ed8e931b3d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/GRM010801257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0444e5a7eb32c8097f78d34600639fc895ea52ecd65fbf36aff3864667235dbb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRM010801258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade647051fcad2b9eaa186c93b135df3e4d310c22cd36a6262f0aa467dc5e5e9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GRM010801275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8d7001f0fb0597643675181eba51ee483cb5f6931fbe69587eec7059ea85c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GRMU11400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d028ff6f739340b24e59f3f5f5d8013ed3a7fb9a89f75236e0a5c39a5b3a4bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GRNOV2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21a55f6a4de76f0b44a729c2f3139b0df8a5d60d4c54c592bc510986d522784. 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/GRL019400116.