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 0xcf40df07eccacb4fcec58556bd6fa497856911c2df8215f3fcfd692757b5a9f4. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60f67362-2a2a-4263-8bed-6ba415042a5c.json and https://artists.proofprofile.net/proofs/artist/60f67362-2a2a-4263-8bed-6ba415042a5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Popurrí Navideño (Alegre Vengo, La Rosa Blanca, Cascabel, Candela)
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 0xf0fa607cc93795b12064dda197c2bbd51d38d6ccc93a78710bbc9af639f0cbc3. 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/QMDA62499755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a2f71312e5c3d0cc63c6c0ee784b1582edb95047f55b31322716a044b5306. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QMDA62499785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4f5b5584ebaaf7c24033454af5661ec667e5041b943bc08da3678f853a5372. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMDA62499786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4fd0c61e21afd9ed4698240927a2ba976ccae4dc8b804c7d9ab14efaba38f1. 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/QMDA62499789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72e7d376a50f8a01ce19c6e3c1852063930d9e1ebd4f1fd9a47c2278da2fd4e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMDA62499791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb09056c6ffa889229a02ef71b8223894e0f852687a9fc4700b2741d93758697. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMDA62499792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe7cf1047316290c7809728714bc1f69585ccd1edf72e8387a5aecb9ff3a17b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QMDA62499794.
Mi Música, Mi Tiempo, Mi Historia (Rosario de Éxitos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51706e6017a66b8c91fc7f9c29b07cddfda088ce23350e5e595b031a25381b10. 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/QMDA72421290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610ec38e0b8dc00160e3d3625f7c5bbd4276d1fa10975ab2e100c332b7d06717. 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/QMDA72421291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a2fcdd4c77f0be8d9609a46dff6f3ad2cefc10bc3df718e3aa43f97eaffeeb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA72421292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aa70390caa0e2f467c803c5f5cf3f916f94081627fbeeb80ff924886ec071c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMDA72421293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df1e221dc7b65af9c22fb3e5143bb0aad421c914ecf3e8b4d42d5a429b8bd29. 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/QMDA72421294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a85f7c7dbcfeaf77c83363fb6fbb126f46c892e7c6879a471228adcc1b2e0e. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QMDA72421295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ce18eb1e4b85ed416fa2c153bf21415f8b13ca0da7e1250d21010b1212d7fc. 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/QMDA72421296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd013a6be66dc2710106a5a3e28a816f9a03587966a528879d909e13c5cc13b36. 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/QMDA72421297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e49570484e38303d2d5b5fc68b212f70390119e266d683024ed9b2728187cd0. 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/QMDA72421298.