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 0xe2d464378d1a05efcc7ed48d1cfe4dfe6f3ca11bcd3057eb90be8ca8a887e044. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/137de5ea-d0b8-440f-a93d-a8bf6f310e7a.json and https://artists.proofprofile.net/proofs/artist/137de5ea-d0b8-440f-a93d-a8bf6f310e7a.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 0xfcd48f3a021e0eb92eaa2f60a57e76537725ae7aadbe205c65dbb508e9b3f192. 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/QZW9M2240981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80876c6b5a5cb3a0b2399d9fe1b7ab69f9b6d14e26f8241b61a4eb768bd0e4d1. 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/QZW9M2240982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aee9f0d4da293073def27f24ce75ead19e6edc1f0957712739ab5f49a158eda. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZW9M2240983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaada9890605fb1b68f0d137b7ba39bdfc406665be37b058af36aa79fbbdffcfd. 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/QZW9M2240984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf22fc4b587b874f4d472d9a6d3939a44b6903bf20aedcabb4b3256e226f7be0. 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/QZW9M2240985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc676d995cbf64a184a004f85b2293b840a0a645e65371ace6979f5d95a817f8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZW9M2240986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf883c7ac486386ea5809a549146d2afce7fe0597f23399537432b815917f717. 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/QZW9M2240987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1afb1379f75f0d14109f2325741fb865d78d65f81664399fa6fa1363798251e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZW9M2240988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3883a80e3aa8893cbaaf0fcc3f205c7f40fb1e41bb6b5d0fe01c6432cf6454ba. 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/QZW9M2240989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55df0c1ddf2b7fef02fcd4d4f0673fa4a8422456800f3298f0b8960650ec1e79. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZW9M2240990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f3674a90511131b771b90530d07cf85d91a24d015b6a43669aedf08818d22a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZW9M2240991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130cc223265638ca051ba65d914e7ad9762ae2419471e72887861da7a9cc924. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZW9M2240992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721c83e75e78b2d318e20ebe68540c108e2970df8c23b871dd0dbb65514df14f. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/US3Z40800388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3bc7b420c01bd96555612959e7360c5bdccd3cf83a32aa72b33cfbb30fc7a. 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/QZ4JJ1650523.
Perrea Conmigo (feat. DJ Blass & Maicol Superstar) - Prod. DJ Blass & DJ Urba & El Licenciado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce3d0137cf75199a03567a39f487a1eacc8ea942fc989670d529f20fa507a1d. 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/US66W1900223.