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 0xe5be933b1086bc27468504dadfb413bde7a4638001a63c29afb231eb2c0eaa93. 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/f846b4e7-0840-4d33-a692-b95654199dfa.json and https://artists.proofprofile.net/proofs/artist/f846b4e7-0840-4d33-a692-b95654199dfa.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 0xa3d40f2970a3a8a04c0b4bbb080d63b7fd59d87d7946435ebc8c6b5b3feb9c32. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCADZ1865287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287aa94ff4a632f10dc3d9e0780d0fcfa1d1b9a50fa8924b05ced77502e30a99. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAEZ2006214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3cf0f57a955027dc28c8ab017b778ac897bee0c3584f256e23807d7a7debaf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACX1749922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb1e292d6033fe5c949f8da24634952b1bbabdb5cc31111b8830b0e40f71146. 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/TCAHB2394869.
Cuéntale (Versión Salsa Los Adolescentes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a105e709839a97d33c79f00cb5122c847548c2b80923c614c06ce790c866b50. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAFB2057114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b25d029ca21f24ba980f702ad2f37c7e32805d5df79b1c4a51ee61468e98e3. 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/TCAFB2057172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1571f2d57373a73c98952e8b12c3e3f67b75019c941a74bffaf9e787e7127ce7. 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/TCAFB2057261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238a7ed3f49b08f06a79b3db6e9519ad78362b3610d29da9e8450e0c178ca57. 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/TCAFB2057270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a422dad7935ef6f7b99e9afded197fd8d7313740e1bd3163cd71b76600a5b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCAEM1926277.
No Es Tan Verdad / MI Corazon No Entiende
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e90b9a4a8e6b199193c2b1ede30a78b25b889ab1631e7db771edc9fe959653. 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/TCAGD2248248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b84c227ea771fdb126c473694be9341947fbfc33d37f19eea1be9bd54a6b39. 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/QZWDW2383145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b84c227ea771fdb126c473694be9341947fbfc33d37f19eea1be9bd54a6b39. 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/QZWDW2383145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaf932cd86a75e56f422692fc439fa549208210cac0e9eab73dfb0a42c5b912. 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/BK4DA2401968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a9b0280ab13eff41b5ea6df6cf181617721e9450d8df976b80ba10093c910. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZN882424109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a9b0280ab13eff41b5ea6df6cf181617721e9450d8df976b80ba10093c910. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZN882424109.