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 0xf381f948f4ccda78f51b3ab7da3c2a2ce7c593a831f5ef2fdbb8ed8c9db81f20. 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/efa967f8-f8bf-49e3-a51b-9a2b3abda29a.json and https://artists.proofprofile.net/proofs/artist/efa967f8-f8bf-49e3-a51b-9a2b3abda29a.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 0x7e20bb0cb9a7c90b55a549f0bcfca19bbaaf2487877dfc32e3451bfb4be7d777. 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/QZK6Q2066912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fd9ff975ff0c7077d8bdcf51b02d0b6f394d09a619d52cf69a4ec8bc01f2cb. 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/QZK6Q2066915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cee42222e038cb66125240dee40f8bc2aac39d7c786c504e8c4092dd0ee629. 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/QZK6Q2066917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fd747756ae75ae13477f850acd4b63bee36ede7735e7fb25dcee7291d4150d. 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/GBKPL2150005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cd0a548093e4f40534b3d070a47498e3abdf6ba18ae709bd50e9f34650d950. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2013834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a0df77aec24a2661ce0587a7940e17599b32329d44979cbfaf6ea75be2368f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFYW1944178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7385870e6e1f93160f4cc7b6882fc117e43265ef5a8f8f06b121d995e9e5dae3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA71913035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1b2a329906b450c92b6743006558f4d51326c95fc3a43a8e0f8b26cd650495. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMPKX1849670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4040306ccd950a87a085e7103b4c5378fc5a6a15283ab8e4089defe155770ca0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA81809362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423e7079bcaad6f7667f55f49b4ec714c0c2b3e0c79532f5aff5ce731a5db6a6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADT1840890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6396d27be6475cd77ecb0d8ea635d1ecad17be02bb19f482ed5c4b71d8c277ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2148654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cd0a548093e4f40534b3d070a47498e3abdf6ba18ae709bd50e9f34650d950. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKPL2013834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732953a9c358e00cb6245050d15b007d7bbdb42129b0e5880e26f83818688018. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2148652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01166962f2033847f308b8c85557a46ab7614ab6e3f21d83f1368715a2fa5ffe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2148653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee534507aad3bb7072844e86e4b76ec653cb7a0f70dc049f70bf19babafa61da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZCE61820168.