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 0x5335fc6a0efd20b37238c6f3ec26d2085a59edad0aaa42013969519c37459b9e. 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/07d0ee79-ea11-4ec0-a1c5-58ac144988b0.json and https://artists.proofprofile.net/proofs/artist/07d0ee79-ea11-4ec0-a1c5-58ac144988b0.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 0x99cbdad3734ef4d9cc9d58ef9319d502c09ae87e0c84f6ab63eddd5660e52646. 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/ARE4L1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b8baceaf6eff34cde120944270f4063a7c6cea027b07bcef16f2589015bacd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ARE4L1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f5618b865b67bfa0746b8d6db7459d1e9fca44414e626f970934d33127a26a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ARE4L1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d761e70b28afedc7b4f856fbda461d6b71e79121a7f058da5e73c32fb417f9. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ARE4L1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2873b89e978e9292fb00de1f5642e625f521a62e68866119d6485a9714023831. 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/QZGLM1902619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6ac8d5c03c8ba3e01b969ad51f389cb7ff228dc347942a17c4345ee2181a08. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ARC2B1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d03a94f4efefb9b9b07178fa05b42ed3d6153b2860db823cc1ff58b02c10a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US7VG1901852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900caa3e52d60bdc0c1b0fe09f09cd091886fe2c81b486515a719fcc37927d6e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US7VG1901851.
Enciclopedia De Un Caos Persistente (Lados B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc044e6523ff0bbf9e3471d9375351d42d9f8d7560bbf8e3eeebe83e6f1399f0. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/ARE4L2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3641960a9375c801c72a60e9fb46d68852ac1bd40d497d6c8f172a8b87b33ea. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ARE4L2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75b41b1a0ddc3530062b89faba15de80879beb8ad87c365ef0934ce8bac0f84. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ARE4L2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba367614b924f0661595f882450b2cfa12f3e3c61ea83de69abb81bea84d76d. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/SE5BU2550442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183abe2a2a8eeb644f2353b74f10f973b4d7a0ab81b6b6187973f368b862446a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/SE5BU2550443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c965c6a76b7645fdc11397344bd061011cacbc3d7d01bea3fb1bb48f4c09217. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5BU2550444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2a8c036547d994d0460a9ec5061fd1bf6fc5e586cf0440af254929928e02c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/SE5BU2550445.