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 0x6bdb944f7e7fc4cb88d67da7b6691ec2d67c13ee7cbb5b75d7a92c0fec54f4da. 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/a20d7a74-35e8-483c-a7b5-208675d0b057.json and https://artists.proofprofile.net/proofs/artist/a20d7a74-35e8-483c-a7b5-208675d0b057.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 0xbbb14a2dc8692d49c78d06bcdfa199c9504a5df8bbeff2f40dbf0dc9696fb705. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BGA261581563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7f325ea4e4f6bc30d10461c26f3b166f63b116968e5ac31ff4ad9a13a01e5e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGA261581350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25fd6ad026a850cdfb6ada6a03edd365abf4263901519727c9e5d0aa946f9d9. 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/BGA261581353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d55bb1eda35d842ccd5f67be8d1b20a5684f33516f7f766eacd6beda5252c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BGA261581355.
Kogato Ima Zashto... (Bulgarian Pop-Jazz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934a69d6c526cc787d1b0083096dfb79a80ef3e9d2b4ea1eab9638d4bd572279. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BGA671271994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec2d31b208bfed1ef8497580b8a13bfbd543cfba1c93b865106c224920c425. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BGA671272004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786e020ff952200aa348326f05685b000654904e0e87d7cba488c4654b864a0c. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/BGA261581363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f711c3bd96465fc5e294984a9ccba98754d4dd30bd3857973692190d983bc4b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BGA261581366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90c271b1dbd36d209fa8dad52ba627df376d2d69f7e09d9fa539af6b0aa3ab2. 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/BGA261581369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacc8a4cc8ad6946923423b69eb22686c7a0559065ca53b071233de1ef81d03b. 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/BGA261578441.
Има чудо, няма друго (Ima chudo, njama drugo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0741eece2db8c597cb64999d40b1795c221374f0cea11b34c74e93a1a3fbc5bf. 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/BGA261583854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9514f8f1f79c2a897c2acfc634b6235bfc9ee69677a037f04ea5077ff1161a1e. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BGA261583858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da5b2dfe439a5a82bcd504ea3a8ffb6501c276536253bd319bcb2a1c364173. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BGA261583967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebff6976691cd3fd61b0e13d054232c7be638c66c13e5789ac4efc82129015c2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BGA261584235.