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 0x3403425297b9f1e38ba91c30263a99e7ff3ccfa573c8d398be502d5e432b6cdf. 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/66b15dfe-ef35-4688-a39b-43330fb8a5a7.json and https://artists.proofprofile.net/proofs/artist/66b15dfe-ef35-4688-a39b-43330fb8a5a7.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 0x8673965452672d0aee54fb5e0bad339dc6e238a80f6b148c891b4b76ed977953. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/PLD821000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f8d3c2ea7d1eacf72516849d92e419caf89266cfe4c243f5b97230d2aa2a44. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/PLD821000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad3ff9efee58c0a0d6b144cd2e0936dab94fd31372d2bb66e637b5ca2af99a4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PLD821000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491a676b386381c793b674fb710a9a6deeee45f0878fdc6d2db576b80b889378. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/PLD821000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a327857efb587af45a2cd273d547979754a3731e604315b706c1dd22d042bd. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLD821000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4c9f844a6fcb51265ac61e75730f5a4f3318db829e26d7fd15b81712bdcc2f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLD821000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8c782d2135cf90b97944f6a8ad3c7ccd3fd884119dccf835f172db27e8c058. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/PLD821000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7bcb8ef73d1ac39c8bbe6b3d3c67558f18f655120ed13517de466e09e2ce7b. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/PLD821000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260cf8d95f08891e1edacf7b5d8306b62805956cca1605db0b9f5973cff82244. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLD821000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7308149d6563927f16c6c3f4665d87ea5505eed3c9f7694166a4c528b0670167. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLD821000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac55c7ad182b5b5632c5200089eab589524abddf6f7c1fa65e05c17bbfd5849. 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/PLD821000035.
50 lat z śpiewania (Live at Teatr im. Juliusza Słowackiego w Krakowie, 2020)
Czyjaś ty ? (Live at Teatr im. Juliusza Słowackiego w Krakowie, 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce7b6406e79553c268976f559a1c5ca4eafa20b4b2defdb5472f9673e3c285. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/PLA552100670.
Piosenka na koniec świata (Live at Teatr im. Juliusza Słowackiego w Krakowie, 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fdb2721b4f74369b30b9817a60814996892daa89bb1b2ee96512a3c8f5210e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PLA552100681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba8243fb32a66857be43e4a48a4d4ca02fcbad3aee42f67eaeb0933e7e4d09c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLB171101435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ea0bf7f0015b1d5ecd927bd64fea1ea1f2e85c92718a5ee56786517249943b. 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/PLB171302699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ca0e6018f5bf5b778648aae8ae0b3106dc5ef0029b925913bc70f862117841. 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/PLB171302717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e37c5a52d8a87812e785224e9e912633948e8a2f9c5dec6a171d64e32e0e2a. 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/GBE7J1012002.