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 0x4a9c249ccf3ddc42ce90ba56a86fea46e8ffdf4ffea35b0b380b7e5fedf9c54f. 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/1b04c0df-4eba-4d02-8a26-84a6790872c4.json and https://artists.proofprofile.net/proofs/artist/1b04c0df-4eba-4d02-8a26-84a6790872c4.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 0x7bf46500a4c50a79c89bdf3f872bc5fd64241da80f078ebabbaba5d2e27630f6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81342370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ef67e8c3ba274cdd82b6a3f901b087cc21dac1a13ba263567c07da1fcf931. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USDY41642161.
Era el Tiempo de Cerezas (feat. Tony Almont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbf621f94021b7d093e75a26990ea1973de4c6a28faa84a7250433aeebfb5db. 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/USDY41642162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d1aa890e8f84c1ee242c99e9a0a56790b7c86282c2bb435c2dbe7a19081775. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USDY41642163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d21b914c446f2a7162a378ca9ffa576229de671436d1d381126641e245ae0d6. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:47:55Z), 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/USDY41642164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eb4391392ac10387269a6d9ddc80224ddc4681857f61000418af655ef96046. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USDY41642168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480f7584212e2b7028f3089c0f9bce283e7521f143a049617e1e88dca4838cd4. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TW2096903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b0263b8b4d86c0827a9ef747ba349e2b7a26373d8fb6cf6e19f53ad742813e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TX2025643.
Contigo en la Cabeza | Tributo a Wason Brazoban
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3bd0bae19f56c7586ceb2a5d506241ff46d468992a274a8751025d59b369da. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZMZ92103936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c91075c09c8b8497c28734410bf991e3c47a06285b2b709325cbf66ef407ec. 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/QZMZ92103933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff65d84be1eee5c0328a9d98d07d166d702bbcdf3e5ed609a446a409bde4d7b. 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/QZMZ92103939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa550d148ce10260b10aede136294cca869ece528fe147cd303da47eaa9e8bdc2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMZ92103940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d12c6a010344919f1b9bae902c9a63ff7fd251a45d04820395f50c432de72. 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/QZMZ92103938.
El Peor Tipo De Tu Vida (Antiguos versos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5507fa50cc2e06094a6dc3112fd3773d359bb55e4cc9a96997842bc291bb82a. 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/QMDA72486646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a6959a9507c8a7fd20b15234431fb0d1d220a877025f722d15d155a75a7639. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:58Z), 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/QZMR82501604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc0e41259ed1c03834c42304bd928fb922e76fd3f7638b57a60ac239f7821a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMR82501672.