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 0xb407381a4bcbcd4d9e389286cb3f73b84928a6ee7695f8fd967d01b7053f063c. 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/cf141970-48fa-429f-a833-cdd8bb59e8a9.json and https://artists.proofprofile.net/proofs/artist/cf141970-48fa-429f-a833-cdd8bb59e8a9.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 0xff35df6b57d5d1a211cb32ccf66e8d2cf2f24f270ad0dfaffbce1b00408145b0. 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/TCADN1870136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfdfb89d9c1f3bd45cab7810f8d3a39d955a524e6afc968f5c1479e105ad32d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:23Z), 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/TCADN1870145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c4321cedbf68cad3116dae281358b6e3c569a12c414ab7462c698a21d8ba74. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCADN1870222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da6f02feb41c938510697bebcd87a64609c9315d5a7b0113684bf7e37540b8c. 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/TCADN1870235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe420f4c1a24d87f6a54a383d004b76ad743fb6db4d9e62f9ad527deee6d45d6. 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/TCADN1870427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d198b337b37d395ba46a9ce2ebbf14a1eb0bbcbffeef4628a9d6f6dcf05ee. 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/TCADN1870432.
Ütrirkelayaiñ (Sin Envidia Entre Nosotros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4cb0de76196bf1db3788ebef8ca84ecad59c11d783121be260bd02bb5af290. 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/TCADN1870438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa781711226c307f702aba3d9df8a4f0b38ba4d82cb6d3e84dc0205fd729cab56. 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/TCADN1870442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044ae3f3858229603bdf229d01764a30ccb986ef474c8dc823d1b15b0afa768. 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/TCADN1870458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfded2f4c7d9861151db3b3679318778de59151427d95f106ee0d7a07bb88a481. 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/TCADN1870481.
Kuyin Ñi Kimun (Sabiduría de los Animales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04acafbbd0291d1fd758bbf6e192fa6cd64f4c2213ccb9e0c718d8ee0840245b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCADU1808221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccf48be27504ea796dda18db286c0386cb11c078c1f56b2944ac8b0014ff16b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCADU1887443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a6caa12e0fd54b2e684b851e7cb9dcdf9f270568c17a8adfc06af517cc46a1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:06Z), 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/QZGLS2162021.
Fewla May (Ahora Sí) [Dancehall Afrobeats Mapuche]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b625229d999ddc377ebeb212edcfcd30f08de836ab59a9eae495c4280e41bbe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:30Z), 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/QZW9N2262270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11be712616bf7010d1d80e96d9a3528e1c6d780e309fc5ad11a9572c4490525f. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZW9N2262271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfb7c0a2d13e532f419c52a08c8a9fdc12740512b1467ccf938d0dcf5ff619. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZW9N2262276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee0c57b46f4a03e71fbd0a80de466550c54ab644dc73543b7fb492aaba8c79. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2545483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93316ce9f821bdb3e64bd6340da1248a4b7205f66ce0a67ecefc8640ef1b67e0. 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/ART0G1806611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f4ff2ae0e7a809e4210ea9dece1768a4383e71b2befda751f3cc620e37877. 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/TCADW1836345.