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 0x4a3559e152f557624e4a5323d9aedbd6ff4165af6c678120faf7a6c806ec2003. 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/58dfad13-4683-4f82-bdd9-dd1f16ed1a63.json and https://artists.proofprofile.net/proofs/artist/58dfad13-4683-4f82-bdd9-dd1f16ed1a63.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 0x476fd3e104ccd606e569c4fb9e3b44a7dbb68a32cd0b063d35c9f867c5216152. 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/USHKR0924202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a11c4f34b070fb628b55d5b5420d173ed04989f6c771bd514893b3f5a60e800. 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/USHKR0924204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d764809585d15cf36d5ca816275ed6cf12547c696ca15f9dd1cbe6365540363. 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/USHKR0924207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dcd5b7576942ea9ca3e19d0b4a9993b41cde587300bc19810b7f1f9c6f9168. 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/USHKR0924208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a4c5385710fb27339036fbe67f1fb588d9b30d9edf2b8d0f3c0cfe7c87286. 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/USHKR0924209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6754d9768eb46ba2bc6786e3cbddbfa4afb748e5d1971fef8fe6e1c063c9f3. 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/USHKR0924211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2a95ae210e4c1442ae62bb76b233f380124bd42187ac4023a0097e970d232e. 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/USHKR0924214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac776e8cf0678100296c28b0c8c6747f878be6a23739d14ce5b6823c5b25bd8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHKR0924203.
And No One That You Know Would Believe It
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a55a59f92082ec617c3aa12028df3c8a2a7a7cb724cb3fe00e955ced80a268b. 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/QZNWS2435389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a55a59f92082ec617c3aa12028df3c8a2a7a7cb724cb3fe00e955ced80a268b. 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/QZNWS2435389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2edfd85673314803768849fc9f22d8ac5474953291b5c0f78e68a4952bed23. 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/QZNWS2435390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a44b146e03f36e4cc0f1fa7e03b08b0101fe34a45409de9951ec4b7f094be20. 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/QZNWS2435393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b320e07f272979332f553b70b3a288b27c54cc30570e7b3c211e066424f096. 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/QZNWS2435395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df3d8f9bfe89d552f46284b067d8f46a435be532cf099d142165a6ddce5b84b. 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/QZNWS2435396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb563f55820507937981d8da29a3e468c0a3fec96c9bc6ca889a764a70bdb9ebb. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZHNB2426099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd3ca3abce96902a6a4b964662d3db04f86f1483c2eac7a35afeb853cec89eb. 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/QZTB52427371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43abc813b921d92510289572106fdc49e011b76f0eb324ba054b42a96234e0e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTB52427375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d9deda68688541cf25f0dacf44d1de935cd3883a92d4bba5b073bb13d0478d. 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/QZLBC2200847.