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 0x050417d8a2819eff9c20caf6ff167d08c022972d62ddcade10571a7bd61e352f. 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/a94b439c-a332-4c63-8f64-32c5b9630bbb.json and https://artists.proofprofile.net/proofs/artist/a94b439c-a332-4c63-8f64-32c5b9630bbb.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 0xb37a369b933b9e1c63ab0e3601046b96ba4c0e16ddb2c0fbd96050d683379661. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/CLCZ21903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b9189dd171a3f445df03570c5091e584f21e5ec9aa7629c0eb3473bcbb1ef6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CLCZ21903011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df2f4306f82cd5c81655c85e3b1dea8cfa61ce27af869574e4410bd964077b2. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/CLCZ21903014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe733077966884f308b629b068f8907e699f062801b5f08282b7fd265f5955a. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/CLCZ21903015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d92ff134d2fd4bc9e76819444153cbd85d180ceb59f9cdadf24aebaa9f69c52. 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/CLCZ21903018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625e9f5a1569ad599e711b3c06cca0621658e2fde67e7a30ffcef89937980891. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CLCZ21903021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0209fa23d0f07049cc40202924069e76018cb02ddfde71ef983d8d050ba9391. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM4TW2406026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b5bbfeb9564a24ca814129710c3bee1a5173275c18ea3e169efdd2f5d0d2d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM4TW2406029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e049b7113279802e98a34df308379e951756ea754d6092913f692845e29d947. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TW2406031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11944c23695f4068c26034733416bd0f885b0aba358ef9aff5dc04c7a978e1e6. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM4TW2406032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b75385c589e622df6a2b0388a133a28b4ea3afaa52ac3a59e8aebc4661ffa34. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2406033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9456fa62c89b631f91857c1a9039618cea8e593c5ab000cb60a59e2c4624765. 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/QM4TW2406035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095254cb433b082738878268a34b7de708f43387ef5443739d737ccad997dcce. 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/QM4TW2406036.
Mix Intocables - La viejita del puente / El ausente / No me sé rajar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd86bf76ad329d839f98cc03774b032de5ee958639a4081e4b25466d45f140. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QM4TW2406037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24bb9709d1ae290bd10a4508d0b2d8aff634aa05e11fde76a57d425e8167185. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QM4TW2409923.