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 0x0f10c0f9d5b9348d33a1ab3426353cc18cca06552ec13af0cd055bd8701be1b4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7067e9ad-6929-4e82-b1e7-14cd25d81a2f.json and https://artists.proofprofile.net/proofs/artist/7067e9ad-6929-4e82-b1e7-14cd25d81a2f.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 0x5ae1d75fad7e6840445d9f04dab75ef4860c787a3674fdadf0dc6d1aae6d419c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOUWM2101009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7a031212c42ba0a452a2eb26f91de95abef6e8034cc2de48d4ea2c986d0033. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOWZ32300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6f89db3adcb467d8c263daf2125ae8877cab0e0a5c5f23c1f33388fb2b8f05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOWZ32300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579412a58d423550b4fd8ab714ead7929f5763f95b4bdc4f6a74a48de5d0e535. 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/NOWZ32300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62efa451f362ca582a4cefcd075d663ef0837e11d8a9db49ceca153b0a1bc2df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOWZ32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60f83fa21a206c5335ee4dfe372d06f4b5763d02adb1015b7c38f4a270c2ceb. 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/NOWZ32300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9418990f5abbdc30dcff56498da92ea373816cd5810b59d426f20e1fb6aadbd0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NOWZ32300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eac5482a2ef294b855dd9d5bba93122d6feb0eb3eba68524822e26b9908b2b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOWZ32300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f525ec0267144903f2d3fcc08227db42bc08924170d22bb7664e138208bc1a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOWZ32300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174222bf8377eb0dceeff8c2b60c93278d4d0807aa8399bd6b64c8e9f5c214b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOWZ32300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a7c2be460bd97c752ac41482feadde8d47f0b9d9adbcdfd2f442c91a18723. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOUWM2101034.