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 0x0e9c3412cf97d77f8daf5d553884b78dfd2c24e9849240df8bd4bd42d29e9188. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1371187c-925f-45c5-8e61-ce6367642f96.json and https://artists.proofprofile.net/proofs/artist/1371187c-925f-45c5-8e61-ce6367642f96.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 0xb7a1d1dec424fa72c551688721cee9f54da6c37f6ee3e9e64b02855819830202. 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/TWCC32310308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a1d1dec424fa72c551688721cee9f54da6c37f6ee3e9e64b02855819830202. 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/TWCC32310308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e211f7e978bcf49cfee9bf5fb29fc35d33384df0d192417b9bad461beceb7c. 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/TWCC32300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b2b2404252f72913c99b705da0b3b362f50adc12663f209d2cd91915a9a955. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TWCC32300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f35808261f024bae10b104823bffa9d857f1668acbdb3862aaffec515f4cecf. 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/TWCC32502463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fdf3609150af8623b46302ad17fbdb168caf2163671509c47322442c0e4849. 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/TWCC32502466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7d2609d20876ea02305268829246159ec36e051c7891517929230a3505dcce. 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/TWCC32502468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfbaff1c3be9a23dc97df873195b5770bbdf4afe40d870c43b318f28721925b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWCC32502475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb3d18be3504f1677c4fc84d0a8781eb84f990e12aa9d534baa85730bd90e34. 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/TWCC32502476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808b9909fbfe885336f1f25f9ea341a5748716fee79000f53d75f66f39a21d1e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:48Z), 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/TWCC32300305.
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 0x06e45847fe456de5014313aa2bc3ce410ddba1171626772857f4f3ccd4abc279. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:39:04Z), 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/TWCC32502474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202808157edfb6996f98a14e144e34a034e7082b29824812ddc2d9d7b3c7b71. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWCC32300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c3e4c532bac7f3e0e02f7a83902efbd6127bf6e2941f88ec5244a47aa90b8f. 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/TWCC32300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51358cb3e6b6386f7ed7b9a4e2d0942bdd080382bcaf04a2a81d199fb00f6ed6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWCC32300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212fd9d6789ee7f42b332db8c526ed06d079fc3fdf4e372e9af333c06c19b23f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TWCC32300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f782e5c7ac3540b2346802d70475360a236812c8f2312b5eaeafd5b050100d9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TWCC32300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28b4f9d4f8344fd82991ca9a550af797174bd5e4557e151e77836da84968b72. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TWCC32502473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc06971744b300e64082ec634afecbfd3484f1a8c743fe9685967079d2213472. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWCC32502477.