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 0xc51688aa1de4b25ab84f2df24285f8b9dde0ca22124a003e7c4c554abb49363b. 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/6044dcb5-df36-4ff9-bd44-606a8dbf9ad7.json and https://artists.proofprofile.net/proofs/artist/6044dcb5-df36-4ff9-bd44-606a8dbf9ad7.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 0x55db8d867b1fa9f26c4b9969016970d23916c607eb94ee1d647a024949b1feaf. 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/ATHK52302301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0573212267e5cec4af5632d6a8822a57f17760554abfcfaeae3ee4ac27ff8d6. 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/ATHK52400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a80405d6b20cc56fd3072c9361ae8f2e20af2d3c7126239b87febc68d8f23f. 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/ATHK52400612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a15bf80816d3a590d966ab8c578230d4defc3f010d6507e8ec16b2819037787. 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/ATHK52100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a15bf80816d3a590d966ab8c578230d4defc3f010d6507e8ec16b2819037787. 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/ATHK52100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f052ba0d6b5f2987f826f34be8e6a5b00b0d9a1c53999bcb04f1b61e532c71. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ATHK52000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403d7c2579f3d91baaf4f8d8eb602019b465affbad026c329e5961dd686709bd. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ATHK52000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46af0279623ca09cb41031e2126c0d43f6e6c74afedf181e5c1a164b6d110f0d. 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/ATHK52000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4d56b724b3466c9a4049ffc87d329dac7ee8cf2bdc4c8bd8a230997feb50f5. 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/ATHK52000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a263926e7c29df2fa0b1dc22c70536eb02e5c90f00de840802d705d5735ad. 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/ATHK52000205.
Bolonaise (feat. DRK & MDK - MochDaKopf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe769e51a0f028c9bd96d244dcdb7f2eaa32383c8975ca9ea7c6f4075bf39ba31. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ATHK52000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206fd6c1cd402de0086cda1dd05cf89e40d7cdc484daef1b72812512fc8756c0. 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/ATHK52000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4434ff807ab14c56b7c8ad32bcbf99cdc3ecf481a0d61ea761a064f360752579. 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/ATHK52000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f024a720fbd9c955b9d5c7cac07d2405797a07ebf9b96a831ed1d84386736e2. 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/ATHK52000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421d1980280da432c1a0cf86043d83009dd07aec5d7df4086d82e80be994354c. 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/ATHK52000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16598bd8fe67dfd2380c1557b881c78f5194b2cdc135ba85689f4c9777416ea4. 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/ATHK52000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7229199727ed92b149cc3b4b38fea3140c8b7655972bf04bf26166104c3027. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ATHK52100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501deaebe2b0215b813a588dc80a69dda6c3d28540fe20b6fbd6e581795b767c. 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/ATHK52100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abb6934733c2dca880f46728e9c9d57ab551b82ed1ee2af7d1f58871971e36c. 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/ATHK52100203.