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 0x5b321ec386f9f5258545038ae569260e99f23d74d673e4da4ad49369c78d239f. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e92ff1c-5e52-4759-8f7e-171a0f5e9ed6.json and https://artists.proofprofile.net/proofs/artist/4e92ff1c-5e52-4759-8f7e-171a0f5e9ed6.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 0x9ee1d71b9e5d86fe2408bff63ba89b76ea17fc24c03ce69698153eb5b5b5050e. 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/QZ22B2081803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05175a661e01ed65b940500d80e9efc6578385ed1a01d86d14427ad3285723c. 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/QZ22B2081805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ac8ebb285d43cea87ce8c52f4a022d59abd33ddf4500dd1b12eb06e3343d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ22B2081807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ac08c53e25116eb7045a22c0f34e7ae7060635a02dfde81848ff79b7eba516. 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/QZ22B2081808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9808f5b0a4012b5085692fa8accce3e476c5462ed0b56b38db61b7ec3f3eea5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ22B2081804.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c577bffcd441d1f6fa8a111fcd505b1ed09579a7e57a16005e6e15a64a309d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ22B2081806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3384fb7403a63455cd8b275684654b964c81cb7ce3b689d586da1a731a07ab6e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ22B2081809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fd1b4c1763fa0838163d5d732acaf88f265751e0293ad985df5622fc7714c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INO131601974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc143c99c673f138333d85f83d2797aca6f7412394b9cd0d77e522f151f2bf380. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/INO131601972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2662fc8de12fac53f8a60f5ed6cc2537ad12bdd34643b37fd3e69b6c0f946e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/INO131601975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc482cd80d6aed6fd1a363dae81fb10c6ff82a9d207f4c62f879c656ce4839ae1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/INO131601976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbedf8f4f9560154b178167867997eadbabb2d3033699ed18ca82321ff0bd39. 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/INUM71300792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada5a9be3590fe5f68115bd42dbcdcf69eb9d6f205b6e1056d84ef31c383a46f. 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/INUM71300794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547205f2ca66f0be8e0c8ff9d32cbe2dff687e8a4fc095a2e3eb137ffd91033f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/INUM71300793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5d1afe7427225247ce73e3a807885514640d837f1dce493a9c63240907c54. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/INUM71300796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9863c467a1021c587b3fe2ea55d557d3f2f0b60a5a2c906c417dc4bdebf784. 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/GBKPL1362328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd70edadf086bf5f7b6a9e0fe4cd9f622973eb1a91b9526b7105bce0cc5a1d03. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKPL1362329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35c4b97b4d265d4d47b254293b296ef083371cf67fa9d2f12f543e8cc2d359b. 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/GBKPL1362330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b0fc5dbe912887c2715d4a9f62006586f566a5428a580a6c48210523a3686. 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/GBKPL1362332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31129e0a1626521a53f5ab1e3ed6f0a1296e1e75f994f0ee59a6e3bfd2af066b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKPL1362333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d547467269e726e80b14bdccf099706f53277f629b35d56e56ee73ab3e35b. 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/GBKPL1362326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b470522d3aebbe9a9a0814375ddb66bcb8194c88705e85b6189f9b5c7d035b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBKPL1362327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c176dd05266ab15c6be31f4f8a38b621171a24f3d6bcccd74471397220b238e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBKPL1362331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3ac94435e21f83f306efd70b457e68d6cbb73d73ffa28222141b55c7bc1e6. 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/FR96X1839072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbf85cc126b66f9d4911bce7ba5a5ea6f12bd66c6ba6ae223c3ed18b440076a. 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/FR96X1772981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b7ac89adeec77f26c9745a6c55f2c47456ce77673def3a84fc5a0b1e545aa4. 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/INO131602326.