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 0x3e48236542d3468c01d1519fe48608c7982b59bbc3593488a7d56f1e4345b4eb. 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/f72b21da-e9dd-4f69-84de-403b38993e7a.json and https://artists.proofprofile.net/proofs/artist/f72b21da-e9dd-4f69-84de-403b38993e7a.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 0x891f2d5aa6f4601a08d292a22f23febd50157296482e576bac1aa979352f1476. 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/QMPU51285463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4588a61895dde1774c3e41d92040c9ed8822153967f0a90d217a5ef249b2eda8. 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/QMPU51285466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf91d0a2d9cfbbeb0140fa4f17266351a84b4ff756c44ef71c134bbfba5be47a. 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/DEDW90800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38865ff847d5bcdeeef7998db6ae7ce83bd5455af35d6fef9afbf9a6a8db690. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEDW90800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033b5882a3b0b1acff556bd4b0efb59445602fcea418000f1956719023c13954. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DEDW90800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321443734208d9a7395150c3a41b9acae9032627b16c7f6bc417f9b6fa5c5e92. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEDW90800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d1f57a6e2ecdbc1c17a49198d143e569686833c4a0127058f80ee5e8f8414. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEDW90800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5667611df22b687d5342709dc58aa222d0ff89b49364930983837a865c9ac0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEDW90800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ea0c35b322880642a2f3a1ff00492e7c52d0299457b773ca08db51b17663e. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEDW91200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10e16d25db902ecdc780df26839317174527b170135c86da56af7c60c25ccdd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEDW91200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a2f68cfc9123a7a90e244105643de56405ea2dfa406518083bf8efc0562b0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEDW91200275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998baa989e6e9485234692d2439e2d5a1e94a40dea296060115433c3c23dbae. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEDW91200282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc555489121d40e74ef67520929c7de840f08ab276e51279f4b344c1440c519. 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/DEDW92001014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3aba2af780e0257f5f062b5f9e321e0442bffd83689a4b26301a1b3a5fb398. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEDW92001016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb065344751467126a790017a32cd6f505e5c5f8887dfe78940080beb53ccfe1f. 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/DEH741601634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb9ec4d264af29f68963bdcb477cbbd1aac5e89c49032c999af42492093fb68. 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/DEH741601630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc146f310f401305243d55d63e56e363a3a05059d9520c637f855f5fa9288b143. 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/DEDW91100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b134d01be28f40d2e317ab4f66e861cd07531f9e5a33170924a94af33803eec. 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/DEDW91100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5318a3602e53f1ceca2b33e04f9519e2a0a41c40a0fcf6027233b9818d02e79e. 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/DEDW90800217.
Mr. Smith - Jojo Effect & Gardener of Delight Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c48caed82f2f3760188ccf955f808293fc47e5830e15cac863e09d8afb35eb. 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/DEH741601633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e86a964aa6909058c696fbdba13e90d3fbc8feb30c1332d1ba83be36be51efb. 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/DEKF30800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7885ee7fcf877a4b9876c879028f55e2ea8147535ec15074aaebc0268f665b73. 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/DEKF30800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38865ff847d5bcdeeef7998db6ae7ce83bd5455af35d6fef9afbf9a6a8db690. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEDW90800204.
A Cool Cat in Town (feat. Brenda Boykin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738d344e78b52fd6686617d125f295fb26fb7d6e7fc684c9f221060115219ce5. 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/GBJSH1229719.
Tarifa Groove Collections 17 - XV Anniversary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801cfd7c40789dfa015ac08f641290b96c09c08b67c89ed67be07232c61789ec. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES36B1717107.