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 0xebd08dac47f29197fbf6d3750e223c3e4ca90789f1e6c11756a04e8fa73c938c. 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/183cc008-4363-4ad0-a806-d676e181b258.json and https://artists.proofprofile.net/proofs/artist/183cc008-4363-4ad0-a806-d676e181b258.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 0x745547e51ce476adb0fbfc6a49f2a98c492cae566d29a3c399d19377dd1944c3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/HUA253779302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a5e9ceaef5c8e1dec0c12cac376590e173b75378bde70ec2e2a52b4dac5963. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:35:47Z), 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/HUA253779303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7645f67be92dce718e420d5184abe576578fda7ac8c9c150e1203eb06d46b1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:31:00Z), 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/HUA253779306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a87c455bf87e51c4d83ea63853906276626ab8ab65f9e0fcc5be4e3ad87e91. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/HUA253779308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ede5c15804a598d0e1161cadf88c59b89625a456d64cf05321cf18f797456. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/HUA253779310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f294259bba42dbd37de394ffaf204051e70e6ba744166819e62718ed5479284. 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/HUA253779311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5972eacabd101cd5c40dd33be0283d9aca6f60877f111f48b885d0ae0300c80. 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/HUA253779315.
Legendák 14: A 70-es évek kislemez slágerei No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96c4ee735602ceb745e575e722a54fc7526cb2a5c83c0751b2bee27c743dffb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HUA253795211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a4a53687537c3b15331600b0b938c78a9c8a72c9e234424495e16cb06c33bf. 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/HUA253779301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c60eebc5019f22f710996bbc7150260ca46c9218fa93a43e5b823e9ecbb98f. 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/HUA253779304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bb8b425e9ad8accc235468b609830710e07905b69c303e730a217438bcc514. 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/HUA253779307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f294259bba42dbd37de394ffaf204051e70e6ba744166819e62718ed5479284. 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/HUA253779311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf688b6a6a6535c34e304e4a26b62dcbff3d624a78f26fdc59a6a66fe48bb31e2. 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/HUA253779314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5972eacabd101cd5c40dd33be0283d9aca6f60877f111f48b885d0ae0300c80. 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/HUA253779315.