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 0xeb1564b510ae49449be5267f83840917765cfb2c05b43e6ab6ba7a44abf849ce. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/300b08d5-eb99-4295-9532-2d86cd09831e.json and https://artists.proofprofile.net/proofs/artist/300b08d5-eb99-4295-9532-2d86cd09831e.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 0x2bd70cd93eb10d0aa422fad2c1a02c717ca76fd3cf097bfb505d2e05d720fc9e. 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/USZ6S9970811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d70f7dcde1d8b415204f537b5ef590ef0a8e4c67961eb6608d1dc18638a0f3. 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/USZ6S0135422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e5e5a43448b80d128f7e62ae43fa19e12a471adc6951dbd1bd6a0397b6674. 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/USZ6S9724110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e919a985de2b21f92972fc6da8d9bf7f90ec38be6052d4260e3bbe68aa0519e. 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/USZ6S0145112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf413a8a3bc8f4aa91d89e6acf9d75f6fdff005560ed2cfc89e0d63e4da9dd2ff. 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/USZ6S7050011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf413a8a3bc8f4aa91d89e6acf9d75f6fdff005560ed2cfc89e0d63e4da9dd2ff. 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/USZ6S7050011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e681b073a2783d168d6f2b99c8c9a5abf891483c19278a10f3db281369a5c7. 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/USZ6S0174405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214cf70507a5ea316d2a55b02fbe8235056cdff806bf76bd27d69816983b4884. 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/USZ6S9970804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8f7b57bc14639b63b0e56f81dc2fd3f021e08aace59bb241508fee70ac056a. 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/USZ6S0000402.