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 0xf7967c241392a060a0fe60ba635e7894dd494298ab94ca0332876abc50310af3. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4770d957-8ed0-4941-b416-3934ea24f1bb.json and https://artists.proofprofile.net/proofs/artist/4770d957-8ed0-4941-b416-3934ea24f1bb.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 0xc0394220a9183969af97da03557b0b9879d1dc64dff6b812593c694992ebe302. 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/USNRS1534858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9556af10f2ed74a175160158754b3493e01b3fec06f43d67a91236636471e3bc. 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/USGZ21349752.
SAM Records - Extended Play - 12" Disco Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c20fc84ae363643f5d2d5c64432420f85e888606cd96ad290fb65fa67c2c24a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USNRS0721632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39bdd0f1812f65b7c4e9f8a1bb7e8dba771a3f391f02a70a4b60852bfb0481b. 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/USNRS0721616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d8ea4756f142819ad476032efc7782c9453ce03b5766de7c0666a5d22a3b5. 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/USNRS0721602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eeb2d09960339af77b80256da15adbdf91950c798ea3ae71ab686155321fbf. 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/USNRS0721622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3783ada69a18ef0a4666c6f17d2718951efb84fb71934d52cd9cb94038d5de1f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USNRS0721749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa686001ab5fd650306bc39a2391da26a916e14b771ec7856b5ef3d7221639bcf. 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/USNRS0721741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0540eaf0d78227e523a4b3bdc89233f4953c1f54887c83cbb7e86009a7a13e1. 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/USNRS0721745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4110793cc908022f3026d3a128c0f20f19d6cbe48d2f65b0aa05d43e792ec4c7. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USNRS0721934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd15671682a3b9894f347aa4b814b8b36274e0cf8647ff3f3a6ad388514d39b0. 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/USNRS0721618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac3822da878eaccafe9f5103b805ab9b232d21b4ff0c14e358d67a55af0ece. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USNRS0721930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd468098fe26ec2b19e476c7293919468305cc4a7e63c3d102f32194980c33d79. 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/USNRS0721742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396e9e110552888b6429b82a1fb94b473379fa4015edb319867e00f2a2d1000c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USNRS0721752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa288fd9e039113c529b0b85c753332c8429a59419c4bb0747107f0c4305dc558. 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/USNRS0721740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa686001ab5fd650306bc39a2391da26a916e14b771ec7856b5ef3d7221639bcf. 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/USNRS0721741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0540eaf0d78227e523a4b3bdc89233f4953c1f54887c83cbb7e86009a7a13e1. 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/USNRS0721745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac3822da878eaccafe9f5103b805ab9b232d21b4ff0c14e358d67a55af0ece. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USNRS0721930.
Sam Records: The Sound of New York City 1975-1983
Woman of the Ghetto - Original Uk 12" Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc26fd61f60de842b06ce4df1a0ec2c20b3442b9b4ccc1362b93c56a5e540d0. 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/USNRS1332186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39bdd0f1812f65b7c4e9f8a1bb7e8dba771a3f391f02a70a4b60852bfb0481b. 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/USNRS0721616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eeb2d09960339af77b80256da15adbdf91950c798ea3ae71ab686155321fbf. 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/USNRS0721622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0540eaf0d78227e523a4b3bdc89233f4953c1f54887c83cbb7e86009a7a13e1. 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/USNRS0721745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa288fd9e039113c529b0b85c753332c8429a59419c4bb0747107f0c4305dc558. 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/USNRS0721740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe169cf9f095f92424d26803520cd825acbbb630771a33842a893bad6f5c3f. 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/USNRS0721624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d8af26a00707022b23a3bbb54390bba894dcd23f61e8070761264b3226ff4. 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/USNRS0721606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd468098fe26ec2b19e476c7293919468305cc4a7e63c3d102f32194980c33d79. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USNRS0721742.
Hupendi Muziki Wangu?! (You Don't Like My Music) - Jonathan Fearing Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e549940b3f0b67389b97c3f4c6c9f280206a286a863590a9b7385c7aba78484. 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/USNRS0721923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85ce88797a089bb862c86d7f737d34804c1cc2ac901088d1adf2a50a9e84b83. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USNRS0721738.
Don't Give Your Love Away - Shep Pettibone Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396e9e110552888b6429b82a1fb94b473379fa4015edb319867e00f2a2d1000c. 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/USNRS0721752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971b45662c55a29997b643ff8429968897d544c0101a95ab1e0bb2149f468544. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USNRS0721750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4110793cc908022f3026d3a128c0f20f19d6cbe48d2f65b0aa05d43e792ec4c7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USNRS0721934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11741a4390eeb382bd1f8f3e63346a8eb6a7de5bcdc204950ca817ddc58eb63e. 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/USNRS0721743.
I Like The Way (You Make Me Feel) - House Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5326b31a8a3eba8dc79dca9db30d85377b70b50ad06318b89be0c45af7e48c5e. 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/USGZ21351139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172558dc528d774a5646cc71d68869ea4d2729c4abcd8dde9a7855a45c6f2a47. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USGZ21351141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24089b00c0b7c950d6017664d7e44b3e27d255b8e8c40b811b0d58f651c920cd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USGZ21351145.