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 0x70d418e0cfd2c7661f665fff178ef9b39b8531db4cfcab0c0f34aa1f5085b00c. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaa2446e-4e98-4405-9fe3-f5134051103f.json and https://artists.proofprofile.net/proofs/artist/aaa2446e-4e98-4405-9fe3-f5134051103f.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 0x0e337db8b1a7312deca98699082f18039da84fdf67cc190b2168c0d564216948. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USA561069314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb578ff8c2935a9bdab068d843d99f59fc9f07623854247add738ee59dad1117c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561069315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00b55731a47b0db38ab0237d536bb2dd437ac2c45b1456f36c60ca69ec8993a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561069316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e0b0ac8077c0389493ae408c68632a852b14ecf14bd3ad20ef4d867f89f211. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA561069317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a2d3a108c61ca6d0227518af118d3a0df0717f4ba05ebe4834a9d08e93bb2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA561069319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344d06483d784a8b81a88e35c85eea5e180fb81b6ea8e786fb7d55cdaa3e494b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561069320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86622787dd01e7bafc03f5f3e148335ea65d8e8b2451a9399f79842c8fbcc72. 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/USA561069321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbee91e8c83b06a368d495ab05319432f9c70d208648ecc7a3f9ddd088d5cbe0. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USA561069322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1177a36f547839fda5c733b5cd7ab42be1bba9d6a7298b3b035a44c97598bbcc. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/USA561069323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99bf6e7ef10b9d7b122445b18cd3bf49b265e7210f2056f4fc57f7d4bb08c50. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USA561069324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc463b72f5231827c5cf5eb6e014c59b1c1ec75d2833ef2cbbed9e63db7abdf8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA561069326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895e739e3388da10d0eb95ab6ad4df56afaa72d2ccc25ed402f7431c1a20b50. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561069328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257932f979d6102c3c9a6f99ae840932e5fb96b9fe85aa3c20b46fbaab2ab63e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA561069330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391dac5579eabd0d5d7a675f3a0c3bc94e1929839b2b7f298b6fa93a728edad0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561069331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecefda2810c28a6232fc9d91ecc2607408562e468199026cdcce45bb330c7f0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USA561069332.
Tragoudia me hamogelo - Songs with a smile
Giannis Logothetis and Company (Live Recordings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c4d6d2d7518108f169c03263103fe9b15bf4287f11e446235cec2093fd973d. 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/QM6N21982698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86622787dd01e7bafc03f5f3e148335ea65d8e8b2451a9399f79842c8fbcc72. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561069321.