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 0xd92f9f0814c5859d39374889f759b07553d6feee2553315d3c76d00821ee731f. 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/50606570-ff87-40a3-bd88-322b3c1e0f61.json and https://artists.proofprofile.net/proofs/artist/50606570-ff87-40a3-bd88-322b3c1e0f61.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 0x2d7d6f114bf7ca2de24d3bf3ad565fa77776bf9732cf2d11b2dd651bb631bb2a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/PLI362057780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69906ebaa4ffe8cde13f14f3cc60fafb81f23f65bd064a58c5830c1a88979a8. 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/PLI368941170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d910de01ccf30f3af4d2452505d3803f0d5ab341afbee6f41bd5963777bc8c. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/PLI361943531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd676668194d49ce869f41170d4b601235d419c8aa7e34a09ab5e5b5dc6d085. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLI360215900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26f59c672f40ad5739ad17834fe3edb52251486e11da9224640ffea5501a0b6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/PLI364263700.
Kocham Cie ot tak (Radio Edit - Wersja z wstawkami)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef96dd09159f0a571015166d5638ce50c76657e7923c7c0d676593b41e8222. 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/PLI369281350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18493a14e88071f8d0371d854d9775ea82c28f48be2b7fa55aa726a37bf9deb. 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/PLI361265910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2def029fb1a1788b528fc3d4949cd7d5033a49fe3739008409e577222e8b8941. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLO382103594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d6f16bbdeb81ce4a4dae4eccde2054cd87a6a4cd6bc98f676cbdbfaab50bc6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLO382103595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b4d763973531b41d3cce3d52d503700dd6bb994ed14214b6e3624afe34bc6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLI367260310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014f6abd07e1f99e5badb5d5b4b3105cd7898c503a74f256c4eeb9203e91fb9c. 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/PLI369336820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd4a97ffe96d7fafe22f848694a9238aa6184537710545afa21074297066d1e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PLI365830710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60b50ecc8b521fed4ddba4d0eb4591a3987f908b42ced123ec01670b15ffafe. 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/PLI360186210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9396de1584375d6ae00cbfa7e111106c47449024c7bc6f7a6e27904f30fdb0d. 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/PLI364866320.