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 0xd0946597eb25128cd1407010e8c91fa5024041748743a101784c799f28fd7484. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5e69961-f5b8-47ae-bb4f-b99ce9d1983c.json and https://artists.proofprofile.net/proofs/artist/d5e69961-f5b8-47ae-bb4f-b99ce9d1983c.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 0x723ad1dd8b15b41a197046d394ccae7c3bd93ad6db5aca80ac21fb17ce7300e0. 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/PLI369637610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc182531a73e441644e143cbed6660ac9f5941a30637d24e4e76ea5ad0c6e90a1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/PLI369637550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4525dd2274a728d5e8f9133c20655462fc446016f53c5d44f27ad1a7fa4aa5. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/PLI369637620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb28b6420a923811e7ef161d633d738eed29f8845ec74284501384ebeecb1fc2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLI369637540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe000c03e9e9fa52e6ccf05640822f85a03f13cea84ced42c8f47697d61539c7f. 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/PLI369637560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c169141340037ac3ce144a2ebe5fb44b96f00dc1e29eca98191312176c1c89. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PLI369637630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e779da613b54676537bf247373effb7d5fc0450a93f982895874a2d34d61bc7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PLI369637570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b81b718441196a4c837327e4dfb4d29b7a028486d64e85f8fa4fb111bcec2c2. 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/PLI369637640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e862ae2ee9f2e6b2e56279d01930659237c5536c54aec74c3ec0fbb9166adb. 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/PLI369637650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c7b7c2836267e861978dd575b73b72be6c2ccb582182c3bcb2383ba82f8d01. 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/PLI369637660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2085f7c653618879c87663ce59fb4e69864c7624e20b7258c957eca0e0ca65a5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLI369637670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2e91072e1d62e9175480082c2e757abdf6664cfd0eb77e5c7aa8d79cf903c5. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/PLI369637680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffa57de0839c80f59835e43cbc1cddfff246c028fe1e02e8dc04ca2d141498c. 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/PLI369637690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef5f7569038dc9d8921151d8b3b491a3561e6b3530877caf94a0919a876467. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/PLI369637590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f77e0ee1feb449df538db3e109d3bdd8b778a78683ec0b08054018e67138b3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PLI369637700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d77b64aff65803ff6ba0371c52d7d28b22cbc56c0246883e52ccb111961972d. 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/PLI369637600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1555872f680460b4b58bdf804a43ce866e3492a9efeebd4335c51152c8be182a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLU941700015.
Bez pytań (feat. BoKoTy, Peres, Epis Dym KNF)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5669b271a63b75893f156fe4094cbbef59817b0649cb0439963920f2c538afd4. 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/PLF241906115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63832fc7a58eb030be39dfbf43e8e160a111126775b6d064e34075775c7f2adf. 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/PLU941700039.