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 0x009d7f5f92a23d63f6f9fe20250c79e9fef36e9fd6c07f5179f3e20fd1665a0d. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a7b6c55-9a91-4160-ac7c-1b37cb1c8d42.json and https://artists.proofprofile.net/proofs/artist/8a7b6c55-9a91-4160-ac7c-1b37cb1c8d42.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 0xe39caf5f38e9ac076c7e53a1c0aff024e3ceefaeb9a8c86f793f84e85c087f62. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZTB92308901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e19d85098f85be51dbc8c641ef5f460eefe1ce7824051b4ba5b6067a0488b1e. 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/QZTB52331945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf62fddf3f8dec8d6ae54a9936ad5a3d9f02928f15df387d9ea116b569cc9b54. 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/QZTB92308903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb650c0cfbfcebf422dc323886f7ef6fdabedcd7e713e74deb2baf9a41f9e78. 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/QZTB92308904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cf50d67081d23ed7860f3697e4ea4e53bcbe97bc482737dc74eddbf30cb730. 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/QZTB92308905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ae334b25cced745b1f37421d7296abe3be076558d1e05dcd0f06fe32f861b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZTB92308906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5911d43ee61f2587dd123299c677eb6e3452f39fcb1a6203b0109be479dceb95. 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/QZTB92308907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb199f1d356552c770616a417bd694e713e32fd826ca7cf7e8746c84065f303ce. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB92308911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e19d85098f85be51dbc8c641ef5f460eefe1ce7824051b4ba5b6067a0488b1e. 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/QZTB52331945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ca4900959c4ede1d8acc85edb88c1741b1aba78a46d1be68c26f9e7050ee5. 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/QZTB92378295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2af78ce658ed65bd74b5289872c78230a13a4970ad536fd0ef94c12db53b18. 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/QZTB92378297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4916b69832e9510b9e2189b0e2d9687ca958bf0b21e55e061b4840d603d026b4. 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/QZK6K2212432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab02492a19be5169f5bdcae755a642af5c55dd7ed53a02b24c6494bd7fbff690. 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/QZES52272930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee043b77dbfa9fcd1bf1033f317f9831daf154f7b986350b9f83ebb905ac6e5. 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/QZES52272931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beac89f944535731e2f86f8db157909cf84b221e52f3421e46cac640d6b2099. 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/QZNWV2429740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758ff4cace57ddf54ef9b4bacacfc051d5e1fd75da5fcca9e82fc6b9174d8090. 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/QZHN92450196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45352f918e238c910cced49c1f88503941aeb4b4255b66e8b0138f1a2cce2f29. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEP2117582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6f61f96d832b965554176807593b5e8d8841a9abd8834e7594c6febc266f33. 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/QZMEN2197584.