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 0xf8dcc007b2359b392dac8116798aa8d99e93dcb994bd73795fa0a335208d7cc2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf886b2a-f23e-4ca7-8918-5ea4ba9a69b1.json and https://artists.proofprofile.net/proofs/artist/cf886b2a-f23e-4ca7-8918-5ea4ba9a69b1.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 0x8aefc4bc528faf80c48f6ea88df20d4b8fd900f344901aac1f0ea2ed97658ac6. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/INA4Z2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f516bacf86d2276dd0f043650636f5e0ac0685a9dc84b9532f26f76f38b4015. 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/INA4Z2200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ecd8bd8c4cee0048f7755632dd9b6d98a444dff636fc50ae734df04e956e3. 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/INA4Z2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a55dbd5f22de00ec96018591cc957f2d2bc69a3e881fc7b7617082d5342ee3. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/INA4Z2200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1b22ad7a81fca9b29635a9d430e2e596fee61bfd6439e7421db0c476ea686. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INA4Z2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86ecaf880d583d7a1176a6da92ac2645f847e5447077e948e056abbcc10c24. 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/INA4Z2200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10df1ce85f84f5fe47348426743321a2c6dc21df9d83036e3c94af47898d957f. 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/INA4Z2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1b22ad7a81fca9b29635a9d430e2e596fee61bfd6439e7421db0c476ea686. 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/INA4Z2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ecd8bd8c4cee0048f7755632dd9b6d98a444dff636fc50ae734df04e956e3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INA4Z2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aefc4bc528faf80c48f6ea88df20d4b8fd900f344901aac1f0ea2ed97658ac6. 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/INA4Z2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f516bacf86d2276dd0f043650636f5e0ac0685a9dc84b9532f26f76f38b4015. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INA4Z2200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a55dbd5f22de00ec96018591cc957f2d2bc69a3e881fc7b7617082d5342ee3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INA4Z2200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1b22ad7a81fca9b29635a9d430e2e596fee61bfd6439e7421db0c476ea686. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INA4Z2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86ecaf880d583d7a1176a6da92ac2645f847e5447077e948e056abbcc10c24. 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/INA4Z2200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1b22ad7a81fca9b29635a9d430e2e596fee61bfd6439e7421db0c476ea686. 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/INA4Z2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f516bacf86d2276dd0f043650636f5e0ac0685a9dc84b9532f26f76f38b4015. 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/INA4Z2200171.