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 0x8c9ed1d16616d82eff19e1bb2a2557b65c4dd5420d3dc3102d18534e58ec5208. 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/c4cd61c8-872d-4622-bd2b-30a19c2ae4f8.json and https://artists.proofprofile.net/proofs/artist/c4cd61c8-872d-4622-bd2b-30a19c2ae4f8.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 0xea4c6e0704ec28f9949e64af4dba921d584134e86bf61d05d70afa563e731ad8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHNC2079721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4c6e0704ec28f9949e64af4dba921d584134e86bf61d05d70afa563e731ad8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHNC2079721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512af6c99836519bf8e83bb24d2854b6a9844ac4f049ea89b6820ff7013d22bd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2295156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512af6c99836519bf8e83bb24d2854b6a9844ac4f049ea89b6820ff7013d22bd. 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/QZNWS2295156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598bb3d6aaeb16d0e46302e0c41e4178dfe2bd1ef5b6df26af6cd9fc19c90d9c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB82266385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598bb3d6aaeb16d0e46302e0c41e4178dfe2bd1ef5b6df26af6cd9fc19c90d9c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTB82266385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce571b1085f34cf25ad8505e6f7427f8296d58ffe5ef096060fc4b705cff85b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYZ2392487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce571b1085f34cf25ad8505e6f7427f8296d58ffe5ef096060fc4b705cff85b. 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/QZFYZ2392487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6715f9d8d874e864abc192661a0c47254cc45e3ffb2c5da28653dafd7756b25e. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZHN42390940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6715f9d8d874e864abc192661a0c47254cc45e3ffb2c5da28653dafd7756b25e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN42390940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62a0d7dbd7c8d57ce4a057587b6cf6b7a1e3c4420af0065d868cb6ea09cdaa5. 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/QZHN92368740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a470f39caccefe5708ed3bb4d38df1e5fa2871b9bea0cba7df78fb62e431e26. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:51:57Z), 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/QZTAT2352020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a470f39caccefe5708ed3bb4d38df1e5fa2871b9bea0cba7df78fb62e431e26. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2352020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d5aeae4128aca257e834f27aeb6414a75b37c331ee1e4b8a7c70e2a27724c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:14Z), 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/QZTB42333864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d5aeae4128aca257e834f27aeb6414a75b37c331ee1e4b8a7c70e2a27724c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB42333864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691a5fcc117bd232fb73175a0b1c8560630e2d2ad3bb9095c288afe22a4e681. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFH2314309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691a5fcc117bd232fb73175a0b1c8560630e2d2ad3bb9095c288afe22a4e681. 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/QZWFH2314309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00553aef5854ca41633e0e26fa2896eba1a3f7565c0f804dbc0063d481bcda97. 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/QZWFP2319895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851d7abbfd8fd355b3b766b7925459e5739d83c9aff61903d7d3104eb620958. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZWFG2494302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851d7abbfd8fd355b3b766b7925459e5739d83c9aff61903d7d3104eb620958. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:26Z), 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/QZWFG2494302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ef0d378a73cf5d96ff180a83b1c62d32c8b792bc4595b5e82cfa31f29255d1. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:11Z), 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/QT3F42426989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1b2be64c83b0ca7b39c0ea1d139bce0e17f2fb3eec40d6be4aa4b3d126ecaa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA72589100.