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 0xa142d92205924bc8f8488f02707a4858d60ce8c548843c727dcd087430fa9205. 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/18344cbc-6760-4778-9d1e-968479ce0063.json and https://artists.proofprofile.net/proofs/artist/18344cbc-6760-4778-9d1e-968479ce0063.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 0x14fc346951d2390829758225de51078f9a1e7662e5107fd7d5df9147b5ade2c5. 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/PEBC21002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdedc40eac5f92f2ab7bc91d63f1ee12ca77c7aecbbdce268283be9b50b15d3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/PEBC21002005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fae4d39f5db361fedd873c57e16c9cedf6b5c73c87040cba91fe0cc80145cb. 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/PEBC21002007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1374063ed2f80d29a5d77dc1494d5736a654f9f030e9c6e1bc35666c8cc7e. 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/PEBC21503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83735d8b32ad618501c4483cbe7ccadfc200bd974a094df2d4c1238e510bc3ef. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/PEBC21503005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359447f6ec3756109cf29532fbeffe395eacacb3be4d80434022fb082918a28. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PEBC21503006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ea6b677c20f13c43d72633cfd1faae80b286c2b214bc88f95c47f53debaf8a. 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/PEBC21503008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48404f6defeb6df7cb7f020cb43f7e4824f3eb15fa20e6bc7458736c051adf93. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:00Z), 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/PEBC21503012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e19cc303a7ffe9564ce2dfb307764cdbb5dd69877727a2df13c0492db1b8ab7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PEBC21503014.
PLAYLIZT Presenta: Barrio Calavera (En Vivo)
Nunca Te Haría Daño: Tributo a Jorge González
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c228e7ad03a7b60240caf8f4ad3ddc3d8ed4e8750a2feea919bdad73109bd85. 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/QZNJY2481512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d8fc06d5e7d92b76e7758211a65150d630fd5288d474a564915a67b9ca5c66. 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/QZW9K2411049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bb571e6888268fd93df6be96e2db4ae177ec8fa85daad6161a5b4a319daa13. 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/QZW9K2411041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f976bd9dbf507d43c60fc457ae19e9a29a229848e7f78606a3cea0c34e246db. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/QZW9K2411044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66ba94c1d50e287866a98f208ecf2acf48dc12bf46282fc12697bd542d224a. 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/QZW9K2411048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc3aa21b03a55a589ade3768bf2719d1249198269bbe02e7c61cf947ed7c58. 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/QZW9K2411047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842ea03ac46220cc66d6936a33403dd209683d6a870befb29a8bdcd3c91a2b5d. 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/QZW9K2411046.