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 0xa209d6e79d6f9a9285f46832a9b62bd7d6067becbe3e0c3496c6b58552bec971. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/419866ae-a248-441e-9cdc-bbb4de70c9f1.json and https://artists.proofprofile.net/proofs/artist/419866ae-a248-441e-9cdc-bbb4de70c9f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Olifantje in het bos (Originele Nederlandstalige soundtrack)
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 0xc3e1a05b69b1b434a2a41396453158e609e8d5e138a3b397e859ee9abaea00c1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLM572500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1a62c84714971e3c4eab417762f92c8945e840e6768baf8d95f98de6c27c73. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLM572500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ba8cabfb91bb2d1f75b222d56244b33d22942748f1d420cfa89dd029b03a9b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLM572500343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d85496e664de2ef1fc0ac39ec15a47837e19c00f527b010e2ed6a7f40b0a8b2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLM572500344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdd826afd91d7b472a8d548586cc01f3d9c99eacf64a8ca5f23e51d68f4db81. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:54:04Z), 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/NLM572500345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1759dfce68a29cec7dc6208a1b71534ce9d7b562487ae027eee9a72c1ad5d867. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/NLM572500347.