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 0x2890389431ceba3c38f546d7a9e75c1e9bfdf172cd9d941fbba9697ca5c02cbc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfd07ed7-b7f7-4bb0-be98-b75637bbddd5.json and https://artists.proofprofile.net/proofs/artist/bfd07ed7-b7f7-4bb0-be98-b75637bbddd5.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 0x79078f2c395d99930ce976244d65c5083a8de345ccc87d837702aea0aaf30fea. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:04:33Z), 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/VNA0M1847520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83eb6ca5abf5e85eb4427a3e799c198fa00d6a9e56f6180ad423c50fd609f1a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/VNA0M1932851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043c867dd880398e330cf8f1752b958cb803ad041aabb59b0b619c51a0c8fc2f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/VNA0M1847519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405267cf964610406624ebd977d64e69bc73a966efa22737a91a16b1ac7f3e16. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/VNA0M1847527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26318e9c71d0aaea8c9f10324256897493fd9c555144e4136c083c01000c7f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:59Z), 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/VNA0M1848202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a7dee30de8b8a6d163626a38e3c55edee6dc9d4f4048cf2304df5a9832c5f3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/VNA0M1847522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dcac18b6ad02b2dfdbd6d9435dca9ff3def36672017947b36b2733933bddab. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:41Z), 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/VNA0M1847526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7844bbad51e476d1d1ed0675f8f1f1b4a1cfa33288ba5a63e3a9c11984b1e0d4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA052074656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920c90f2cbbbcde6b9cfeb41208533b6f10ab9d04a3065851c5a69ffd2a02c4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:36Z), 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/DGA052074657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4089a4322920e3a5c7274bbb4d6220497398341d76840c6a6d548d7a59e34311. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA052074658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ad9ca39d5fcd04c17497c18c8ba05a97c4ec669d6248912ce1cd0a1a92955. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/DGA052074660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff2095d758a6ca2179ae8df118b8f3c3642848893d145c00d5e2bff2f24ee73. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DGA052074661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18eb04e9eb0f1650b031e0ac0d01ace36039097807dc68542f4269337d0b4bff. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA82042889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76863fb8c9567579b46c05b0c1a3c24acb57e594d359a81727dbdbd1887b0721. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R2131924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10073b8fcfd41c40f4b7a4e8f549a7ba95a76646dd1281e4b5d00c193290ce4c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:38Z), 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/QZN882306207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf841af9dadf10974f9aeeb05fcc79fa5df339242b460ba4e8352aad19bc122. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:16:44Z), 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/VNA0M1935593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e39ecfd2efc26258700d22c3a15a9db6a39fa2307e686948546dcb95e41f034. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:57Z), 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/VNA0M1937305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf336f2649dcd4f02b2abf4027ef034674492c2c20014a2f97f46240757a55ff8. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/VNA0M1939313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8b64a4a91a71ce7307ec57520c09ed9fa1009744701bb3003cadfa57f86398. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/VNA0M1939507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec27eaaf1ba055bb503e2f8a0a556487dc770e9253e15dea282e118ac7a89512. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/VNA0M1939995.