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 0x55b6c55763e2e9129cb5096a888f3a507d4592023fd17a0c95216eec6d3b1c7e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24958cc5-dcc3-43d2-b819-d60fb3ae7a45.json and https://artists.proofprofile.net/proofs/artist/24958cc5-dcc3-43d2-b819-d60fb3ae7a45.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 0xc6b3a156d272fb7c9d51a321a60006e2f8f1629bc8bdc6c97a2cf1f81634a2d0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6P1970987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56bc4bd6e9e0f37fca8c16e5bd36a5e0729ec8bf0c03f220f268aea1da932c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ52030077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3e1d53620023311308e66fa0202616f2e3db0625328d7d8b8bc152e42e2d79. 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/QZES52084489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b748a2fecc89d8a4fd70b7a1c042a125404b7f44ec7fe34da18bc243fefef7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZES52084490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e71e6beacee3adb0d98d77b1b2c6da2c9453ea81a1d367f8844fa9e09797c3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6P2035919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035aeeb96a0960f9fe4424752b01610fec2424a2ac5559b28243ce0ae6549772. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEM2077758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc826c5d4e8af05a7bcc54a2c0d52da5dfe9b8156ad432a582c8a4bd43642cb12. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TRCDY2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51402b53a627d1105442ad3bcf60d2087bfffd8b275fa77b711b87c95c31caad. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TRCDY2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796372094ecc1df80c65f3a9cc6485d608347c3a038bdeee02ded43c90da77c7. 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/USA2P2358165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523a6812d87a4192607e4e1ce7985ce8146808f93d1a15b8649e45bf47d4448f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2530494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d149664acccee76cd87ffc66b10750b71274e0f2dfd189ed68cfd8717cfdf6c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7N2568452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59430cd15ed956e18f61d67ba3bb1528b597a4333a35cfc7e8a4e6270c966f8a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:37Z), 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/QT3F42505301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece3378765b4f80e2171af08ef2440226809b1f08060a33be4e3b400d0e7d009. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QT6EF2526130.