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 0x5c23db0c94db60b000eb25daa19ffb5cba091fbffb3fbf6fb929c821ee947596. 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/a9aa2a53-1784-41ba-b45a-701c1e87d53a.json and https://artists.proofprofile.net/proofs/artist/a9aa2a53-1784-41ba-b45a-701c1e87d53a.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 0x8478b82bac83adbcbaba7ba0c9540fc67398b75608c6c8de11dd4ce2883e9d1d. 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/PLF671501502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d24be1221cfb22086de3bf910d83dca2c5f845946329b49c795621bd2ae3bc. 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/PLF671501501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e046f6334ccc72adacd48ad4d217d733f0d6f7da8cbfc1615029b12e70d46c6. 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/PLF671501507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d24be1221cfb22086de3bf910d83dca2c5f845946329b49c795621bd2ae3bc. 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/PLF671501501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f9f0abda341be15572fce7aea03f213af110d88484724428d3cda882215cd2. 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/PLF671501503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1df1aac15ecb83cca3801e29ced192314593983684f0b2bdbdcd7b3ce0132f. 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/PLF671501504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb5c73b8bbf8f22b22b51088441238c425f2f6c65531439d048a55c0c051065. 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/PLF671501505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b00ed0e36904741748049de6ba8ad2574b735d3f23497e4217cee1ece31552e. 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/PLF671501506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e046f6334ccc72adacd48ad4d217d733f0d6f7da8cbfc1615029b12e70d46c6. 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/PLF671501507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919983f48a72db595c3fcb9a7c979609ebaa7923f42b93730fa72eb66c6eecf7. 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/PLF671501508.
Mentalista feat. Miuosh & Mam na Imię Aleksander
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b95f36f8957f757f232357edd72fe3d102073712e007f713b05e4029e11a12. 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/PLF671501509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e86083236693a72a8acd56fb92faaf2723781fb180396617319d4f0aab3f87d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLF671501510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e18152d9aa1a86a7a749087068a669be3a061b90f34c84d1a554cb1f107996. 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/PLF671501511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8478b82bac83adbcbaba7ba0c9540fc67398b75608c6c8de11dd4ce2883e9d1d. 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/PLF671501502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497db7f59c4ce41131a59f4a8d10f710f63cf3ea9e409a3f0221202dfe692777. 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/PLF671501513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ac224935eba661427204965d17017c11e5c6de471695ca3db684364b9ad279. 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/PLF671701711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ac224935eba661427204965d17017c11e5c6de471695ca3db684364b9ad279. 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/PLF671701711.