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 0x42d195789822ee7ab21ac0a83ac629f58b099f3877aacee1315f98db6c02cd99. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4607def6-a9c1-4efb-b048-209367949bc2.json and https://artists.proofprofile.net/proofs/artist/4607def6-a9c1-4efb-b048-209367949bc2.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 0x05137d47bef4d2be78c86f613b699ad433503af6434d3306979208d4bd6f878e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLI367137970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430fb19c0b04a3fc1736d0852a7e515c16001ff96afe26bbca57a90d2431c6e5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:21Z), 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/PLI367138010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbec2215056f6d91e03e6efc4adeb3972378c14c8f5e98c0399dbe64da6f7d2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:01:25Z), 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/PLI367139690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4b268a97f878bc59624d4feb88be4f8f31d712804815cbef1a975c0fafe27b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:58:48Z), 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/PLI367139730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde725bfba52dc4d2d4ee958cb9ff5dc042a8a8e80cb6370c2e5776836dfc3d3c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLI367139750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c05bfb82d4a07e107f52f1388703429057e0f58944e0c771036b5cd1308c291. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLA811300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b95e1d2a2883a85ba269fb08bd5093fb926d590343d28d87decb5e4dcd19dd9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLA811300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfb941ecce1b86b2e746ee2a208cefd06dcb966d15d45907170f8f75cf6c9e7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:45Z), 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/PLA811800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9fbceb7cc482a01d5634aaccd2ff88cab8361b18cddfaef79386eb82cf966c. 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/PLA811800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f862dcf24fb57f0a85790149eb1a66831a87b87e2e21dfd8bf3f3146bcfd7. 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/PLC591900243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf860dc1f88820a7508280c7ab19d4a424fb231dc0f383067104a828734ba2c43. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLC591900237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad4f1c85970d621a99126d5e9f8392291b63a446a717c2e37c255654e6b9bb3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC591900236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd906c4531c1a39f3232ce8d69acf18c287ed7e5af00a99a549d4fa3af96b8c86. 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/PLC591900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf2d69b9a2f962a24566c74a59fc9550bfdd8628585d6724f71c7e4cf8cec4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC591900242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22771aa7dfc66f8708b5d88c8f6fbc2954e039fb0866b130c7aa7e071cfd3e66. 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/PLC591900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748733dccdb7efdd6f2f6cbbfccf6383ccf6d910d799ecace76e65c74e15d5a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLC591900235.
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 0x4d176fd570349151bc7d8bd819219ce6ff73eab67d081e5f0afe0a5478c732a3. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/PLC591900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2becf00f1460d3170529d4d773b3c23892cb75631b121ada0fb3d5076a511bed. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/PLC591900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e48d58c008ba77f656c1e031579d951ff6b803eb154feb35c30c81d02f68db3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/PLC591900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997bd80bdb9e641f9d842334120206497c3d25db9ccddfc42a5d9be8bce2a96e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLC592100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc9cb5357c814eb122469cc72eee79db9e14068f7be8d0c5957b82fbc04026d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLI366103880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6080ce68c2422e4254199a388a4c0048940098ab0a663b2cf69999e2d5e2a2a4. 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/PLA392500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6080ce68c2422e4254199a388a4c0048940098ab0a663b2cf69999e2d5e2a2a4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLA392500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d1bfe6ebf756c19f2e33375e5352a8f4170ccebb94725c9aca7bd5a82a8f03. 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/PLA392500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd666550baedbc69b7fe43e1b1379757da37036918ff5224e5c6aad709f1355. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLA392400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf03cff0f40ee14d46ca573ffe25202a266d6842be859f119c5bee4b56049f67. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLA392500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dbef889b0d79d45907c2ec5d7fcfd3b9ec424ee9cde58e498b5b4a590c460f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLA392500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc886750b93f06994e9d0434b54ee6625f4c19c2bde87c60ccaf7583929c5d55e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/PLA392500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa1635f348f140c9f764f5f978af3ce06e7f7e2ce3ced9c57c180eae863591b. 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/PLA392500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5d9546eac88eb02d421c0146660fa766fc370bac6082f87ff1c2768999f618. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:43:01Z), 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/PLA392500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e501f1b5f9c45dc666123cdfc75a15db8227c25435af78ef7a42c216b65df4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PLA392500064.
Byś spojrzał na mnie (feat. Marek Dyjak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e2a7c1682cf121524d534c8bfb48d050d122291472d624251ca0e614c2c52e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLF301700506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f36973f7e2db0a1de175a205786466d11a95983ca24e2fc2818ddccd1e68a32. 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/PL17E1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0099e9f1e8c465ea2825893a9ceaaf3da7386908e1a4da9823a1515ae4d6c674. 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/PLA392400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeec626c2cce5471a49a4ba0cedf140ee87ac0a78fc9a43e7e633e04736ec6c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:02Z), 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/PL20I2100052.
Grzegorz Ciechowski - Spotkanie z Legendą
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ba3b392cc6b1336a23dd668e3020cfdc9fdc5dbb85bd1f4058d0426ed97098. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLA391593202.
Przegląd Piosenki Aktorskiej we Wrocławiu
Kronika 29. Przeglądu Piosenki Aktorskiej
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a00ca0b8f9f31c540f77ba7ae36e66ec38092950cd0da435cf895a8f0d7a858. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLA290800060.