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 0x42b04173f983b4f17c84ecc50c85ce3ff63c5fa43a9be49dffb8871bbfead9d9. 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/e19b9a2a-bbd5-48c5-b08f-39a1b29eac37.json and https://artists.proofprofile.net/proofs/artist/e19b9a2a-bbd5-48c5-b08f-39a1b29eac37.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 0x22fad343945abd956425e07789eb43110b65c9e7612c32b81715fc5955d59e20. 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/QZHN52485466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bde33fe8ccbbab3c1103b5436a91329b46bcd510c8f1bb2247eca2e83a5d32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QT2VB2415555.
Lofi Girl – chill beats for LEGO building
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e6deef47f3fd48764c5592c5c6a9a21e53f98bd9b8bc3b9636258c3d26fd3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2306978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fcd935f15d2856dfdb89cc171288068ac639688ba3b090ad6dd23bf3dc1d0e. 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/GBKQU2068328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4186b0928067cc488701d45f5beb54812b0711032cee204a6532d52d4cc830b. 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/GBKQU2129267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342a998d32fd5eab4a0f66be5eba45823a023299c2cf9485c6763c390114ac80. 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/GBKQU2129268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63059fd25608ec9639205e254f0318b7a89bd9647e10abf8fb64d8b87a28705. 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/GBKQU2123923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8276a10401dda96b9993b4662834a4783de50f7348bb5af17b35e1ab227fea82. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/UKZGC2300972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe634a88e738511429234469e6effeefb708f9996504efdc5ee2142a09c757d10. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882231962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf9710c50ee2fa0dc690861f9788e3d4b8a07f64002d7c6e9544a34c1752eed. 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/TCAEW2004788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4cf6227b27edbf03917880bf1e271c24f2a12e358ac31be271ce73d8ce0189. 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/UKZGC2304537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8612fc74acba0872eb4e25a31fda4f9cd1a36682622cc3a7d65a3450da4cf9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882160473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5406c1883fbb239b3407100b39ba45881126833213a1712399c7e635e589d4b2. 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/GBLV62127940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08336e1123fd48429c7fef6c9e6213f883d1dcc75ff6f05daafe3ab995002fea. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM3DF2143211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dd9ef6dea26bb88e144b4d9b49d23c88371cbe2142effd14a0e5205aa05cc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2184029.
Lofi Girl x Chess.com - Chill beats to play chess to
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e7d8ea504019dc7c9da4c374c05a5078d1c02de83913a0ea19918ff883a813. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2309072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79fca5bd59d758e234aa520b608519700a8d55996d7ee12f63cd1ad5a6a6b92. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UKZGC2304536.
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 0xe8ad2ed82a9f837e14b9c7b6bf7f61f51e81c2678d1446444c53ba8c30cbbf8b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/UKZGC2300097.