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 0xcd82109ad32e989fd5e391afd36e4be9d43e137b0408512852b23b7e73c8e57c. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea814731-ba1a-4507-9952-7d298129db6d.json and https://artists.proofprofile.net/proofs/artist/ea814731-ba1a-4507-9952-7d298129db6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
On Tap (Real Connoisseur Unreleased Remix)
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 0xb92e5e753fcc65bf57f4ed3a653fb12328dadc2b3e5df3f4e1057d561b0775ef. 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/DEBQ71600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d90117f7a9b1980a90eda2401cd08ae1731907ff8e1f20e220aaa8b4aa7ec83. 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/DEBQ71600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9251d37cb82cf76777f1b47650c4c590ed9102a89e33a636d6acd67ad54c5899. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEBQ71600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79b368194d37f83c541c9eec6913bf1a5fe0c346d7bef84944f53ca3367cc05. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEBQ71600001.
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 0xc11d529502400f63fc77382b028309d3b4c76f51f1abc3f199c7b6a75fb9fa27. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:42:30Z), 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/DEBY41200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadd7cefdbe8b087f18d3e9bf532db1f4ca98543fee6796897d4bf76d8484440. 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/GB2DZ1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701638aa3589dad5da50eb2bfd5d47101633e3b5526b18caf744788de924c2f2. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:15Z), 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/DEBQ72100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3635c7138a47a38a71e91fbd2edb65a10af2a05e96c07afc650aa86a5d689e63. 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/GBTVJ1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4c6a93d6473d5f208b8821d8acb16a1d21c2ee050c972caa449d99cb54cfb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEG932102016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817224eaadf41122d24b5288aebf978604fb23daf6ea294665b1a5c5ac494ed0. 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/DEG932102486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0af0e729698c803d9147cf938a15a1d85ccdb2d061d8bd03a3ef7400ff352. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEY471812303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675d7287f6cf0fa70d532b8d2ffaed0126a6048d60003fd22c97de857e87abfd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBUM71205972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc530587d874290f25f5ebc6d79415c60dfc2d7dcd1f2000d7438560223fac5b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBTVJ1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379ad426e9d5f9722f9de9c8210697a76302fedb0e1a7c597f261a0e763d689e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEBQ71500030.