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 0x1da2aa92ce16a3560bd6e59b1bfb6beb94c441ded665fcf9eeccc7376979fb02. 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/bec5965b-b043-483e-9432-f5e1503592b0.json and https://artists.proofprofile.net/proofs/artist/bec5965b-b043-483e-9432-f5e1503592b0.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 0xc6cdf561cc45b1c35912659c5c56c7afef5d2178f81a7ffb60c9015bf2b75933. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PLC142200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd46e7e313bf85be6fd97abc7854f1e3fd6ca0ce384288a42381a750a41708f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI061500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b7f17eaaf1423726744086aaae62b3434878a48062df29990dd446c94c2ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLI061500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ac51647b279cb93c5ac531b7a18cdc1f6ca0247fc5cb9fda89b0a3c344586e. 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/PLI061500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8682f79d48b4f383648a7d3debd831a8c61369f2e97ef18ff0df77b5e2ae9a. 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/PLI061500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32caa8d10f4c5bf9385bd3fc985d18710e3597a90a322c31e42f93a2785053e. 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/PLI061500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9dd3f6b89d6401b5c8e9fe5efb0448ccc3a45d7ecb5db885c51e47fbc78689. 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/PLI061500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a747092fef4305bac9863d8f589102c9fa4b28d4a25e0d5bd00a58feda89e2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLI061500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b520d0a06cc0ad4ffdabd961da921dabd2bb0f0edd1ab3a5cc49e88b0bbfc91. 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/PLI061500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9a09303f9cab63ad768f72895b9ac4b0da70badc17ba339041a6d040cdae5f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI061500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbad48f8ab9f606dd08262f38c56748a681917cd5ab8e6b1bf359c0529757b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI061500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac37696b47df8c7f2b675bc8de15f96ed966aa3e41da7f6904c9afc4b3b3b80d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI061500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4897b0cffddb345b70c0e2c75bfef88fbf4aaad593a06f0ed31a1ab268e2d42c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI061500012.
Minha Teimosia, Uma Arma Pra Te Conquistar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002fb4e770ff5015d3d50b5a922e1e3fea509fc0b99e8ee612c3892ad0c3e634. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI061500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb1185bd8f2f43d99c926d66e60f8222193c2b0e1f629f75e78c6075cb45bf2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI061500014.
Przegląd Piosenki Aktorskiej we Wrocławiu
Kronika 29. Przeglądu Piosenki Aktorskiej
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3658a480c90134a6568c4497907658c697c392b2700842157ac12ad7a5357225. 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/PLA290800056.