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 0xa11f637f32b2279cc348c5a478152d3f4efe7540e98343e3236673e453fe5767. 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/dc8bd51a-413f-4b11-a8f2-6e8458565da5.json and https://artists.proofprofile.net/proofs/artist/dc8bd51a-413f-4b11-a8f2-6e8458565da5.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 0x5c9224a08bf92be77b2439d1f25b09d9f1ddccbfe0ef4a82bc5eabdaf635500e. 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/ZAPQL2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1383d026a660dd197c0775526b176c2a4754fa703d42257583500026e84af77. 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/ZAPQL2200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeb1b1da84710e46ea5b6931a2375bf131e9b8ce7e7f5f76c5e25a7db1f8db1. 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/ZAJ811100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf3b17f391af8c2d70951f37b5b7993ed2f3aca6386d50f29f405fe65ea9544. 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/ZAJ811100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51833ded65cce36b5f7e380f2402bf3cc6073d77eaa43326eafc43e2aa9a6eec. 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/ZAJ811100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947aedf9f210af62cd9b1756a09ad7f55ef7a6bfabb9cf4d557e0ac8eb3b15fc. 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/ZAJ811100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9224a08bf92be77b2439d1f25b09d9f1ddccbfe0ef4a82bc5eabdaf635500e. 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/ZAPQL2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abb0488f1a1d0f4ba4a002f6cbaabe9d4bc16b34c342650ef6776054a2474bb. 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/USHM92198814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98b19ebb7aa66da132296e79ae84b9a0a460a6894e8a79602c4321b63a2ec66. 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/UKXN22098945.
Ses Voet Diep In Vergifnis (feat. Almero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b99983016d0b758b76eb79a6916e2b9f0c3e6ba72b5a6760104f9309b266264. 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/USDHM1523818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa866b661ca6d1c187df1ae2a741c54755c180691a4ede5088e22842cfe8a79df. 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/USDHM1522261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633077d06566fc28bf00732ef3849cdf6e705bfe7f76bfd374d7b4f170969bac. 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/ZAJ811100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb032ab48bf282aa7959f328ca8bf061ffbb60ef6cf2e130b7e80e9b047085a12. 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/ZAJ811100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98af8de1882c728f7cb469c13497573baa80a30a39eb999165f11ce7d23156c1. 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/ZAJ811100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6370fd5efb5ba79abc7f6e842697943faceb5e4129e239eda86709b6a6f832e. 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/ZAJ811100097.