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 0xe04760bdfd293ddc282ef6759412f0407f84afafb0a70158dfd713ef64c0626d. 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/f157f02e-73df-465c-abe1-dfd8dad22f9f.json and https://artists.proofprofile.net/proofs/artist/f157f02e-73df-465c-abe1-dfd8dad22f9f.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 0x6fe1f1b867d196d86ffc2c0ef78f8bf64628208d9a8caba30ab7c8802179cf9d. 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/GBMA21358909.
Long Sleeves (You Know Where My Heart Lies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc43752078dc30c54bdf6e7df771dda49c4e766a20f05a76a7243cd5cd8b6ceb. 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/GBMA21358911.
Out of TheTwo (Acoustic) - Bonus Track Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f0382bd72d9832cf1472fc3fac6048d553e91d1ad826e970b7b0559f85c4d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBMA21358913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64508f2f004fb8d6b16eb69859155aff6d65aeecc0352bcd7981decc7398e63. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBLFP1400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5384be66ac1ad8ddc88ae35384ebaeb70636dbb4c6958a28da2704dff4a89b0b. 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/GBLFP1400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5270f42526cc2a193f17e5a5ee399ca2d7c456a261959073f9c62c99105aa95. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBLFP1400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359ea6c22506964146762e1f1764d6c2c13434c9bcb77ef0bee2fdfaec6809b. 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/GBUM71703297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e78dca74b7e05d3bc08bc67bdcdd561615ad1252572fb844e7de7f06866ba4. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBUM71702612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea931714f01dc9284d0be315af199133a238464029bd57e39cb0d99b99e13e31. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBUM71702629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbc04423a2153fb08d83d9c6e522bf1243760beebceba04f906a743917f0a74. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBUM71706488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b97916a8b1bbe33ea5448cfd0e6ffc6a4aa10ed54a1a2f0d4a4389241954725. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GBLFP1845598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4256f04abdd0f6dcb5a00e29f581829d9c3d2ff9f8c8eda54d99aa803c8744. 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/GBUM71807420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130382e1d1d952f9ea76290ed7ce5466803c6ba64959e03f480fa2251dadac6. 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/GBUM71900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81336782f2bc3802b86dc969c6b84594ae765e2bb9ef1b2fec271de8385de468. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBUM71900900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6365661a311aac4d02de284d56552629c32970f5fbcc599a84abf207786991e6. 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/UKUDB1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50a3b0240fb5eb8f0079ec4bc61e1a7c4feee1925d93629a601b5e85e2a1696. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX202252047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51be9d081fe918af930c71769893ef497ae7ea3d077e8e528cd3ce1cf9d702fe. 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/FRX202239542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e07aa0f750b95bd2c398769e3ae237d2e4481115b9cd924957379689764d846. 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/FRX202239543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045c9f1ff80021f05a41f56b10ef5385e6e321669f6d37e0c73e1b83bb3ea285. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX202239545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0db05d55d8db8977b813b004cd0b165e0bb5a3902423a01234a6c9519c6b3a. 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/UKHAU2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04451c0e6295ddd95f3df772380f90a07a40b37cbf3d83d337559081134f4645. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GB8MX2300893.
Surface (#SurfaceChallenge Edition) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ba2262e0387587988442dc7168f7816cd87232af656140bc22fe668c0d6c92. 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/QM6MZ1815975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfa7c1988a96e116a192cf65a3bccb160f33bec180203ecad43662d9631ce74. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKW3Z2000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602489709603c7c6d19da281b16374e9151184e922c0fab1b8b8b58c5e9ddc4c. 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/UKJJP2000009.