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 0xf366c439cab308d7f5015ae56a5d7506c64d5487b07a5703bab95b4989974f94. 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/23653890-0db3-410f-a184-5ea1ac9ab940.json and https://artists.proofprofile.net/proofs/artist/23653890-0db3-410f-a184-5ea1ac9ab940.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 0xbe8e0988dc5806779383be833c066bee1cfbaf1cda751000a7d0b3906290c251. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UST8K1860504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0bec974b7253ae7ca437dbf51ece92609ece62e9d6afb7a24356a0bafaf6f9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UST8K1860507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78e5e43a8a3bbc4d4ff9a3cfb2bbdcd41312154c8b8ac9df20955aa8ef21d5a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UST8K1860512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66d557425045c8095980663c5f10b51ce56da9c0c8d9b74bfc831b77e65c8a6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:00Z), 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/UST8K1861615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7800a9c579194356d128e401a5881a7d93c395b503b5f168e8a0f5d8b5048633. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UST8K1861616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499495c41347939511fb57834f8033a46e0288586b1897ed442971d60be4e5ce. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/UST8K1861617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0ae518dc599178361adf4136880f9f3a1282d52ee64a7dda25ee4c44b0e395. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UST8K1861619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc09435c9a680d2a7bc62e3ad1121d37438838aaa5786b3ca1f3348a85004b3f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:39Z), 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/UST8K1861620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cacb7300240d034686be77f7377e0adb303b4a13a5d470bc92f9e0d2c4e8638. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UST8K1861622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205de564c3e09601aa2c821d115646b815675d32bce05db858ca5d2b3979d66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UST8K1861623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98f30a39a42fc947a1d4eb9cd97199c2fba22683f6684d5758735563165c879. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6P1926080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ac877ec4a276621faaf7ef2bf497c9434645dd1cf80bd496ff41e9508cf78. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:13:32Z), 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/QZNWZ2216039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7579fa6c30546708e730d97d58106f43bb3f49c34d50eccaf74175c8ea799c58. 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/QZNWZ2216040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c4cd54e803ffe4d06abd25a339d4e6390a35474a8488ae59a58b6e9e5433a7. 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/QZNWZ2216041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b2a8f7484eaf8390b2a553aeb6d26efffd46fc0dc2b199d7bc12bf5c965985. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2216047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b839cddc4db0173287d8f22ec8b287623bba847d096967c3eedb11fbd31e54c. 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/QZNWZ2216048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6306757483590478252826ad6ca59b104e14217a2a2a4d4874b7c62f79a03e2. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNWZ2216049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ab3b5cda42ff8ecafdea15c2e6be8fa19b6379550a646011c593006e5e3450. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZNWZ2216050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c1f0d127669db138241aa9701b0f2d76382d4092479f68a4761a249d5f53ba. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWZ2216052.