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 0x1bb140285347be9afc2beaca5b931eaea8231f37cbafebdf33f20e908f0d35ae. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4e4d97d-f34c-4332-bea7-bcb32228bef8.json and https://artists.proofprofile.net/proofs/artist/c4e4d97d-f34c-4332-bea7-bcb32228bef8.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 0xca0fdb6e5ac9dea8d17c6e3dff19b6f22fd1768ccaaaee379dbd1a33be069478. 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/QZN882083631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90eff5c5a1048dbc205718730ead334b76134a0a182d469b4a8636f2561301df. 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/QZMEN2454577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d01b367ef51ecec2a20d3ece53f3c2f0410be0b40b4512af9332dc73fab4d16. 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/QZMEN2454576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3db083172b2ec8a6007f2f7de45645b0b47d93971f3eac1fe90e73982031a4. 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/QZMEN2454579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0db1c1c8f59dfc962981e347f6b2c0259191228fd1abee50fc2cf859a2a466. 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/QZMEQ2499089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cffa0d719a1919c3d6bfcc7b48628357b5343de4b88af12f28744e73cd1eea. 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/QZHN41923698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e6b520b6f18fbdd6505507c6bdd8ea20a8b3b08d9520854873170700aa082. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN91921841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4697f6c0aad0d3a3251da4d4411791f2a442083ee24f9aad14687954b513be. 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/QZ22B3004598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2255a0bc13d97626b202e76e0edf732b2a3fa93da4b8ec01ebd93633d671309. 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/QZFZ32346824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300df5acd54bb5383b04236e55f1a2372fd85ed98df2519e6558a97be27bced8. 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/QZTB22201081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d59baf499a34bfc53e3231f5c4f16b2e54150c62dd921ee37c3772adf6b9fa. 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/QZHNB2221696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb4c19fc3b21442978593f4061a2fd5462271f362b5a14000fc04779a6d9310. 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/QZMEP2116789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7df8cad6ec77a12e1f159e924fe13b13c914ff98a88c0777dd884458f46d45. 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/QZ22B3004712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af66430d5d843c462b285f4ef20ecb568b3fed7468e3394a1a86be6c4debfd. 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/QZDA62047741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cffa0d719a1919c3d6bfcc7b48628357b5343de4b88af12f28744e73cd1eea. 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/QZHN41923698.