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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7629963a84270fb9daacd1705d31cb09a581a17e37527e35e47c4c58b9b6b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8561f668-1b4b-4a82-8c1d-c3817bead3fe.json and https://artists.proofprofile.net/proofs/artist/8561f668-1b4b-4a82-8c1d-c3817bead3fe.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe277a73259cd33025dc8c3a97fa549bf82c5a3e0521961a86143bbaa92fa06b0. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/PLA291700172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7d013b5286ba7629bfa6d23d09a6353d0a4ea5eb272e2d7e58b725b1d90415. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:01:01Z), 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/PLA291700173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17dd03243e38ec15475bf9b4240e95c668fbbb7b859db3b2a1210a867f54a9e. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/PLA291700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a950dc967fd602950790fe162d8c11700bce0581be2e1efb1952058777a2e27. 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/PLA291700175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0b99c4aaee35a9191a9418aa663c552d2e508e66ace024e87f8af15bd693ef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLA291700176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd280ecd499a833ab49e65ec3def936beae078570d6c850fc3784a787e35a88e0. 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/PLA291700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b46dcf911114672a96149ccc8914dd3177bc1a1634f6811408e4d9297947f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/PLA291700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b6b286d85fe24273fdedaf7102590e4eb7564964a8e84cde588e3e51cbf01c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLA291700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12df79806bd4538127b279a63736bfa85ce3a62fd196457663450d74c21ec61. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLA291700181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe100a60e3d8228a7f9d8fe5b07de1200bfef6442882ff3b9f6ace32f43b8f17b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLA291700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66930eb304869dd8d36ed02eac18f24cb702c4fbcf78dcab3becd636dbfb12f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PLA292100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21b7661d8438f66f61d15bf9eb27b1218f258ff5e9bae300cd17615d56f3b50. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f92795802ec1cdaf287e338711b30b6665af54eace1d47ff8a58a5fbe5c5436. 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/USWD11993863.
Przegląd Piosenki Aktorskiej we Wrocławiu
Laureaci Przeglądu Piosenki Aktorskiej we Wrocławiu 1976-2019 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d2b67d526158f4369463d73b57137524e9c323c172cbdb484c7bdc9aac069c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLA291900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cab8a28ae3a895fc9464076b97ab2bb441b2c24fd2cb4da8ba913e099d6a1d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PLA291900042.
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