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 0x217a30610d13271044844f3029b859463e7731a339f3f393ec179fc3bf0ca038. 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/c07ff1a3-613d-421b-b494-0f7a61e5e9b8.json and https://artists.proofprofile.net/proofs/artist/c07ff1a3-613d-421b-b494-0f7a61e5e9b8.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 0xdaeccbadc925b6d903f76a7f1edc15847935ee7e98deec4b978bcbb81de31c92. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLF241200356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6631c6fbe04878759b170eea2be69789d2425348d5427d0260709435014ef81c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PLF241200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dcab520b3f72d7b8eeeac59509e108c00ee54e0b34f95b8ed6f5e3a5d8f969. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/PLV801700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beaf454ce845d8438a330ed2dcd1bfd6d6745cb9128e41a7037a06040e32319. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/PLV801700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7195df15debdc48ac3f7438363b196d71e8a988cbe12a1b53c96a0e1c9abfe38. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/PLV801700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecba449bc0249218449f1b052317dca87a6c7ec21ffcc0efad5ec2be512b7c9c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLV801700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf544cc345f7eb15b9ec669bcf2f7b8486788051459afd1620c7bcbcccdc022c4. 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/PLV801700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4152da22bedcf7b1331b2aa385dfdcd10e0521d3f21c8e54d5f0e4523c30d7b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLV801700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ca1fbccec5c81fe667b4d61334963e7423b2755fccbdd1d0f0b3dea68a77f4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:34Z), 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/PLUM72100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182ba64ee4852a4060fbea5243fa6f5b0a2a9ddb35c80aa18205f365f36d3f04. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:38:42Z), 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/PLUM72100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb53cbc1e59b44340a6bbfc967f40c421cecb5ab92e706e46d442b93b9fe60f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/PLUM72100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d6c8e87af850fc3d7e49c02fe9b200ffd78ef68443b2c425a31f9718fb2bb. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/PLUM72100231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe348c5287fe523dca91bad64207cdd3b041ab383ba84dd9c80dd55a69e3b5b97. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PLUM72100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3594e21ae29a3e29e49517f7faa05672ca17d977903b52e9f272b747f91e8bad. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:02Z), 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/PLI369016780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ddb52095a4adf7dfd60aa8df0a3f1e839bc9e218f2c8114a58d15d885555f3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLUM72300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c988469cb19a1bc8b85730f95c61ecc39cb98b9372516201727fded9b7f61. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:29:46Z), 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/PLUM72100235.
Chwilę dłużej – projekt Ogrody Śródmieście
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7802605ff9b42e2a5e7f5e4de0fc3340c1123d3bdc1ec80539ac268fe5d65e84. 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/PLH511200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1a7fa6508ce753cd2238c6106f64880832314c794b612828a57198eb15e72c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLUM72100682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75fbcc5991725a34690b1400e588476c0a60fac5504801adc419a003144e3d0. 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/PL22G2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e415e6a2dcc5b6287c9064793ac3a64ef1f23f082363555680a64ceb10c46. 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/PL62S2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d508913e0453fcebc662af5b9cd2bf8dc740b8caddd3a4f1b0b0205dc8edc0. 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/PLH441200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db777cc9fb917241352c0497256f9b3c2eacefa7adf82b2c56a2cae91cae86d. 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/PLH441200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039ab8b2be45f5ca2284c420e557ee87977a24a315f05710e4307af69933d340. 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/PLH441200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183016e28966dfbf161ca2311182bda9c44d54b5673e1e9ca0fd284d1bc5531b. 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/PLH441200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f3517671f5bcbbbd2677384a20a48454561c6a41f74b00959b35c3b9ab8a53. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLF242210109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72678dc20f9a4326224d715329f588fc6aa147400c835d42de3f9d99b2ce1f56. 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/QZWFM2361349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1a7fa6508ce753cd2238c6106f64880832314c794b612828a57198eb15e72c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLUM72100682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63049db11f3fa6cbe87b230c1537a9e7d313e8b613a2dde9700b9cc98818aa. 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/PLA392400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c29b9fb8de5eb1b5a4e7218a16f4ec8ffb7b2c3b8e079223d6c7f9cc21e4d9. 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/PLA392100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ab24bd3b55cb42e2c906641236f46fe4697292614d9272001fbe64f8b3b1c. 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/PLF241200038.
Miastokoloromania (feat. Poszwixxx, Cira, Jarecki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a8dab9712b122481b355340514ab259b32daa407ed5f30c93e9b1f5dcabddf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF241200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e415e6a2dcc5b6287c9064793ac3a64ef1f23f082363555680a64ceb10c46. 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/PL62S2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ba17ac141d7786659bd0c3070370304e6d34b46a67b73b1bda121f31f52b91. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PLI368536410.
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 0xb3c82e2d4477c4bc6c43d438b97b93d5f26c60750f6057b4d167c80c0f6a7312. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACB1462274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a72ecfe5b29402c255a5aa6c9abc4d60c7e3cdabb99de0a511086ada0aa325. 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/PLF241200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5c9264255fc436a5d6a6852cdac739b4b584d8b020746e268862603ec56850. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLN561500011.