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 0x8f6550d9d58fd371e4a66db405127de711cf3ba6275a7fea5022f7b2cf169aa4. 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/848b25c4-3fc8-4aa5-8ad6-bc1eaba7effd.json and https://artists.proofprofile.net/proofs/artist/848b25c4-3fc8-4aa5-8ad6-bc1eaba7effd.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 0x90576352b56747ab0b4a6b4438afd9dde04afc2ed77ee42996f99c63319953e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA42147200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44a263897826e7b640c2458e9d9393635d9a979cd356bf076f145c787c42b1d. 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/PLF242209582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155bf075034b7388ad25246f7e463d43c79a3b9db6b993450a095f7833291516. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLF242208917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9705a8e92981d51af99eb0254f269e2ce3aca599b030475d93da6d0ae52bdea4. 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/PLF242209691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95122b831d8aa61ebd7ca9dbc4b99687743b4109a8a095e9ab981e864eef0f3d. 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/PLC062116397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08181bea6b2b3a83734405b5665113bc87f54d25050a64cc3ed254f3ba13870c. 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/USLZJ1951457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa03a945592ebd58142a1497e13fd7d200aba50c8919d282be2e3093f1825d7. 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/USLZJ1984891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ab47d17989052ab78b6e580166fde190089cce7139b30ae0363b1d655db94. 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/USLZJ1984893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89515819f08fd8dabdef626af20d5bd2e8ae8657113667f1c4bde39cec0f726. 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/QM24S1915688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577057f11fa1ecb16b84a20f04b4a3e8f752af94e5b256cc8340e7c49377ceee. 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/QZDA51873919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6380ceac3f9544ebbd3f319c8b1952c5c76a2128ce47cc80700e4b89b0ffe8b9. 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/QZDA51873921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69854d1756833586fec074c9da1e742c5f5488aeaa837033c13f5e09d88c6d5. 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/QZDA51873923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a2a74a032cbfb5e322f3a46c4a3e0dc76bb363fa6fa9eed36ec2e55fe575df. 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/QZDA51873924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9bed3c310c872923f6580623067ae8455c4930804e69e64ffb2db0831d949. 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/QZDA51873926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59822c31b00241f4aaf90120c6700e333caf2cd62197e76706496c4e87bf5a59. 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/QZDA51873928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300f355ce6b58e0f16cd19a5db2c76d002d30890d7083bfedec7871fb0d87732. 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/PLUM71700694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d38ae5ae48f586ece8cba18908356c5b0c80c96bcd84b61e9c0b69f4c0c56d. 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/PLUM71700695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf77d3f8b1d5f017abdd36591cb428150052e48015a3f66f62895cb40cc0db31. 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/PLUM71700696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39f303465202658de7c475f4d8999142f77c573a6dc91dee9a1915e7b68c010. 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/PLUM71700697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8871fbd3d5073bc12bd9913985e56aa841c026ab8c66cad86096ac37a9347613. 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/PLUM71700698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718a87816e3633918789d976a53f6dde971e43ffc85926dfb110d7cc987356f. 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/PLUM71700700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf903babe4fa0f8dfe6d991b0696ed1eb38906ff56931f77408e97e1688fa43ed. 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/PLUM71700746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce62b7ca54cf0eb23ad2cf009ae1530be9ae571c07447ff061110dcebc69bc1. 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/PLUM71700704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae23cd221677d18389c9a73db352a26ffe825026534fa8cda55adbe573145df4. 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/QZ4JJ1607997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edecedbcb2d3f46a85644a9c162a819c028fb94d305b72f59f19de686c63928. 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/GBSMU2960137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe3a9df93d4ea3cdeddf07354c037db99c333511bde08162c37b7780a0d677. 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/PLH341300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c47b94dfe25109e09555baffc318cd12c89c0b90ec73575ed1a5c924d1faac. 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/PLH341300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811135c5e677a75110e484f99cf2f4e1833712c1af4d891b190e6464b56d4b05. 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/PLH341300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a6d0005c0cc3f1a3c34427f53c79c079466a1b1d61a5e6c9f2a36458034269. 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/PLH341300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448b287ca8ff3cd848c75d4ad5de602dbdfb39edc046e6dbf286fe17fbbe38bb. 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/PLF242412292.
Czujee się lepiey (P.A.F.F. "Lato '94" Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6bfc609e4884350cdcb55c616936454666bd4c0b6a0590130e9d61dd066691. 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/PLF242211592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf0710e9cce39bff97677da3412cf0f6bcfa5a32a40d9a718202a5de57e535e. 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/PLF242211577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59b81360329f6d376bf08efb42af488ba135fa5cc76a5e867ad4b579aa664f4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLC062366610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eb89bef91e5e325f13e27378beb4a28fb36d8f45f347d629041fc54bc2ac33. 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/PLF242413407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6bfc609e4884350cdcb55c616936454666bd4c0b6a0590130e9d61dd066691. 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/PLF242211592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb487b5c143ada128699bf591bb2d80e9b48beedb39c52211d1dae0d82500eb9. 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/PLF242211677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bc2fe601d7c71eca5b2928355e496f7a948ab257f72c5118baee0251184ea4. 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/PLF242413410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448b287ca8ff3cd848c75d4ad5de602dbdfb39edc046e6dbf286fe17fbbe38bb. 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/PLF242412292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f0b721269d99cf58148c43f9294a457c78d6b404ee75dfbb56be9d33a75fbe. 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/PLF242413294.