Osvaldo Silva Galdames (24 May, 1940–2019) was a Chilean historian active within the field of prehistory. He was a founder of the academic history journals Cuadernos de Historia and Revista de Histori
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16fa4ecef5ac410c8775ddc09f3ac6011dd0beddb727f54c42e7564d5f0f972. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d0ba195-c090-490b-bdc7-46c20c19bfed.json and https://artists.proofprofile.net/proofs/artist/1d0ba195-c090-490b-bdc7-46c20c19bfed.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ee0372ed4082cd89d93febefbcccdbf51284ff5024493dc35062fe0b11d7d4. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEYX82211095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada85b72224b5c54eba2068f559e5c93d375df4e1d1cafebc432218762f7ecc2. 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/DEYX82211093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c232e56f6b0ffdbe172e48ba80a8b82d8ed9d5bc20d533f9115a6f68e342e3. 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/DEYX82211102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717a57e2fdb3a8f25992b0454689e2536e13a8a7b5f03f85b8629bf17c67972d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:26Z), 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/DEYX82211091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3d210ad93dfc3552cef178909735306c120f9d49df5e006ebc47d4dd13174b. 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/DEYX82211108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd043f472c8c0fe3b344914942421457c468e427ed35ddff25c02e2d64ef9f6f. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/DEYX82211106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b532ba2e2e16f9ef5dfa45b0b094793c58ac69e33e397f02ed2e4cee5221e8. 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/DEYX82211105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5871a017f04fa4a1aa0aadb431db4997f4f9ca847339d73971a45c1685f78218. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEYX82211103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb08f15f03694296b9f0ef5ab8e8c978ce0be95df0a0d2785fa157e08dcc941. 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/DEYX82211104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0adfbbadab5993d6c3fc87b2663ed6ff0b3a94a4fe5a7c4825e4e2ce74b8a06. 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/BX0MQ2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397fd9e938983c19c572b9ae2d424b0c569f541a4df254918a84c0a5a9b10811. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BX4IU2520327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcd4966f0436694361093b1690908da9af4543daacc131ea88b034de5cb9595. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BX4IU2520328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653dfbe44b5787089ad91f0ee967d85402a7e8e7db16743d1a33d0ac36106e20. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BX4IU2520329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052fc8129fefbc31d6420fec881070b0816e38bfa41ae463b0ccb8efe87697e3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:33Z), 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/BX4IU2520335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7423a2cd8ab461ef03841f32564ea4aead4c88da446526c813e41fc6b3cc652. 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/BX4IU2520342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5319f34957c3539082b75a4b98de3415e850f1c5ad95998f708132954511d2e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BX4IU2520343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af03e9aa3b9bf07d38e1dfdc550be4224fcb1fbc29cdd3da478a2783a41d15e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX4IU2522360.