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 0xf29eda6d35d79f53dfefa10ba66b6c7f6603758909dde484bc69a6286fe8944e. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/853a6168-ef16-47a9-b816-e3e603bfc07b.json and https://artists.proofprofile.net/proofs/artist/853a6168-ef16-47a9-b816-e3e603bfc07b.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 0xd6f6436a48d26d5d5698b6c80bbd15d34096d9c1de8f75e0388a09c50d6545f6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACM1603279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019c6c27ff61dd1674dc848a83a81c49eb0f8bfc2756c3d31f5e25af2ba2b7f5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACM1603302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d96b4fdc2a5c8ac984bf7752c5675e6ec078c510893d7f3a2684b077dc8e138. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCACM1603303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd657fdbc94a6fe2b17cc98a24d6af2a22abe19d188cde99096ebe2feb7f57453. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCACM1603307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcdb01174cf9cf1fb36fd3b5eaa62d59b91e950fc457e881ac2bdc363492139. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACM1603308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5ab14ee72a4c92c98009a84437c47fb8e4a97794739367300716c661959c8f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCACM1603309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a0fd9bb6153b512f296b721d0df076bf34eb048211712934d8ad9de34c7d36. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCACM1603311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3bcc7a8bee42eaa4ea1c8de7a3a535e64cc577ee6d31b265e879e411dc9177. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCACM1603313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd751c228d5a221e124ea13d7927c10ceab5d801f7b8a53d657a5cfa727d28ff3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCACM1603315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd431e1ee69a5734acf727199e03a29ab297b6082a35a7736581cd5b1537434e5. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCACM1603317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3233749f01350893885da7c27cbd9d905fd1526f09e0de9ef65b02cc28e87076. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCACM1603319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41079b053f588aeafde11562d87dfadd1acbb478f7056b2b79fa4aa46cb4f672. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCACM1603321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74b5660389ac9a8f10a31f03961c181193df8515e005914b255f67bbee8fc74. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACM1603322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786d87575339cbeae47931fc34430f10d2c7d1176732a5fa33534041813fa6dc. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCACM1603323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2525836f2e072597deeb2e5cef9b17cdf084eba47a60061f46b6bf9ed35f569b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCACM1603324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9c4c116414ee2f1a92960b606ce1dee183622156c0fe016ece42c1cdee5fb6. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCACM1603326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b1cdabab7c14a9dccb77898f07d2f4e68f772eacd461072baa56550b7e4056. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCACM1603328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7294b42a3ea0ba76cd2ea6449fda920ea9f171615314eae2cba9a6864eebdf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCACM1603329.