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 0x5aca482fa9554bef4aed7bd761e6c9f0ef82f085bb6bd9ddff8a4fe9dc7f16da. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b57fd492-85ad-47e6-970f-fbd7ee7863e3.json and https://artists.proofprofile.net/proofs/artist/b57fd492-85ad-47e6-970f-fbd7ee7863e3.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 0x7d67556363058d7a9f5e21a7ccb78e94be8cba06babe3cf48f3101b1ad31f51e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DGA052047537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f947f08bf44b6491d93cacfd863e4c134bd6671026ec5a166a1d95229dc4a3. 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/FRX282141192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa074848879a797377dc13a3684e49d0606380243a8975c5d969c25886751ee. 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/FR2X42147357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9df6184e1709e69c047126849d1edc60b70f9e8a8f77c875033fb0c3ce08b. 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/FRX282141197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2ec92ee2c8f0193b347f0c2f0760cdc0dc37d7509d87c8aec533324152406f. 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/FRX282118972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e29785f929a3ba66a72bdafa78fb1e8afa80ea0b4d271f6abfad384dbbb66. 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/FR96X1992977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4117ce701a0761319fa8e9c28836eb0a20e9e14b132308e553ee8d03d16984a2. 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/FR96X1992979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dad19bf046b945fa166ff23fda0eff9f518a574d4d20a434fae89677e967ce. 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/FR96X1992980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c893d9ce84c0b5a1712e9e6d30ee520bb24315bb263c8d09ffe8a653955a7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0L2384947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bf2c122a71c2ef173c1b6bbd3ce4e412bb3f66839bc9e13e93da11b8b7c405. 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/DGA052395497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6859d992d1f441fcc440a0fdabe7e357c7c36ca48492d11663591e06df3a0a2. 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/FR2X42285386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f1e9d837c2d44a4d35d5f16125df87f9a735d056935ddfe8de0fa478e94a76. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR2X42285387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2ec92ee2c8f0193b347f0c2f0760cdc0dc37d7509d87c8aec533324152406f. 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/FRX282118972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa074848879a797377dc13a3684e49d0606380243a8975c5d969c25886751ee. 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/FR2X42147357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d67556363058d7a9f5e21a7ccb78e94be8cba06babe3cf48f3101b1ad31f51e. 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/DGA052047537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600e0f75933995ca4882a1305957eea32f676ca888ca4d4736ddd5456e5c69a7. 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/FR10S1921940.