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 0x149c07e54edf08203269431a555e8e5dc4283291cd78677fbafaec4cd7710c02. 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/5036872f-3234-41fe-b1b7-ad7cd5247a64.json and https://artists.proofprofile.net/proofs/artist/5036872f-3234-41fe-b1b7-ad7cd5247a64.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 0xe0b21a43f1b074c2c1c36d4bdbdbb4d10d1f9a6918c61693b47fde1a97cf4d72. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEVX52000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bcd45eafead417b4c4c874ef2757e6560a76c13084ea9cbdcbc9b4c5b70ae2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEVX52000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ce6f473b21bc6283ae91d4b0889e6f4d717954f1c646d5796b8f2467d6922. 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/DEVX52000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b21a43f1b074c2c1c36d4bdbdbb4d10d1f9a6918c61693b47fde1a97cf4d72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEVX52000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32edd37af4165186d02fcd6c6a5630aa6e6351024355fe5e3aa5f7a18723dd12. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEVX52000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee5eeedb1f9ed3ee11a10cf907eb9ad4c4eba88f1fdef7bdcb607a4fc330928. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DE1N12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179f655e5b53d920b1ef9b6cd9a62583d5c8f8faed3821fe8526f9ac1324a406. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEVX52400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a5d2b1e3357c24beaf9ff1dd2928ef47fa360d263352f4b6f42e323d82a55c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DE1N12500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7facc54f6de9500b20de1fcffed0a4ece21a3b9ef5061f00a2bd521c4eab6a55. 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/DEVX52200081.
Proszę słucham (feat. Duke102, Stacks102, Skoob102)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da62b489f8c776e29971a51ebe5cd4cb453fef3bcf103234cfd24a218ffce9. 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/PLA552100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cb1293bcd9e646d2d72eaccc0cfb2af522bffc4230ab9ce16f32d3742cc4ea. 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/DEZC62445206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da62b489f8c776e29971a51ebe5cd4cb453fef3bcf103234cfd24a218ffce9. 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/PLA552100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6188b302806259e55e0e1575cdd28bda6c71c0e9ccc24d7cab2ffb991eaa71. 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/DEZC62444108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60107ac1f51f87afb5d23f5684461ee3a57db5c6743e9359c9bdb1334153093. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DELJ81934874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6467818324d1c30640b92b3596660b3b9ce5ff9cfac1dd1351856209409d5fe. 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/DELJ81758352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea9f8eb9d3da2dfd9405858afd546a5b7872311d24a879a782893eb16222508. 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/DELJ81894519.