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 0x2fcc18919e491dc44d604a2780416d0ee59b53c11467ed2f43825e254dce4d06. 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/6c8e9784-c728-42b1-b20b-a91175763c9b.json and https://artists.proofprofile.net/proofs/artist/6c8e9784-c728-42b1-b20b-a91175763c9b.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 0x7cc8fee77a6c73a2a8eec39534f669939500eb7b42a5e51b5d448e6ba9cf9f8e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/US7VG1449230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d145aac70a18324a5dc43d4d00a67fe57a59a499d2c04146ed54c8575569b9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/US7VG1449232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2234dcbce26acdaa9317cc7e55d7da1c708a2f918ce33cc616395ed352fdeb1f. 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/US7VG1449233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643ba0e7ebb1f231c9df9d76d18b2346a00913b8f1935c29e91cea53045e2bd8. 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/US7VG1449248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfad300b48942840bef8c8002e183477e17de004d58b8380ca47c89796c0e9a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/US7VG1449249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60acc11bf4b9e804b8a8366823f4d033ba39bb2ee687a98ccffa8ce20f7b8b38. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US7VG1449251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c68a86dd5951838ceb2810d99f63badeb44810538e3c066cac946b3bf88f03. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/US7VG1449260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c0ec7058729592a62b396e90f78e2972e36fd7aa162a8904cb11668122cf89. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/US7VG1449261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e37c8cc82b0446fb5bf89902cd5749d487d3e8caa43d920e6f6ca03d5881fe2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US7VG1449262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe804bd487aa1230a68531e68e506bb81448bc1732abd451a200c08ac4c2c46c9. 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/US7VG1449263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1bd613377eb2bf060b7c339197aeaa1fa26bb22ef6bbb5ffd0590839e5f482. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US7VG1449275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0746902033e83e370dcc3d5d02acedf82a5e39d03b590c45fd39104286df7478. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US7VG1449276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3899f2a7c990f979dcfe08d6e8c45a1101baaf8a395fec54a52d0c946f5e4ca. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US7VG1449277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7a2936ecfb2b1d5c84d7d8aa49451ee9fc625e8c85d87cdd62e2b1be528594. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:58Z), 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/US7VG1449279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119197d5a443ecac42f17a474c6f73273efeaa22f25328c8969a83f715a924a3. 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/US7VG1449280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1063f2a36ecfb83cd55b6435399b98d1163a7f270753d6df3bf40984a549ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG1449285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b914a68caca06a12362b1527a3c5d2aeb7f40a91e7bc337ab0d5bd31616c197. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5AB1708183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07a37716add68a94e8dcd373f31d7e17c4caba119f75e00eafb036338dd949c. 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/QZ5AB2006075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dfa667ac357e7ceb11ebd1cfa93b2f2c63c94dcd7acb69ec70c711de76219a. 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/QZHZ32045271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e305bbcd632290c79b5e3893dd6a4ce9c9604dbbf4806eaf011a2092ac91fb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHZ62014445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea4f40308b5a983f35bc56eb7ff3d86fa5c4c16e213554f1e12c1d76423e0dd. 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/TCAEF1998033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9732bb5b2acdf590e05c3801180d7474a70112790be28c06b03f9849c0bfd1b1. 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/QZHZ62141408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33e2c9b3ca4b61d99ceac3c20d826efe310de9db9e3fe442cf179a707d3f32f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNJZ2337410.
Serenata: ¡Cantemos por Guapi! (Recargado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe30309f6a640cb3d73fe057c70172685df99a8bd39e215f3f221080f0121c7c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJY2581588.