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 0xf65f50b37a53554163d6e897ffba85e3bcf82245dc4ade0253db0d9f48a5f910. 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/260da9ee-c83f-4287-a2c5-f87af2228738.json and https://artists.proofprofile.net/proofs/artist/260da9ee-c83f-4287-a2c5-f87af2228738.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 0x581b2788c3c4a28c82a75239aac8a2feb28ff515590bff566df518e71d24aa48. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6H2206485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb596f9392e32243b688d33c55a58c3a01167d219e86b89eedb512bcef42c3957. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLR2263881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10ea96b96db466b8cf97997afa0bbfeb05597fe4bd20ee34f1bf3494a2d2369. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6J2318520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f889153d9d9b7da415f7c92db67c86fa39dbb7faaef2effba392818cb93462b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPLR2386598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da295279083b6c95d44ecf7b095c25d1368b1a56ed37934b31810990636686. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAX2388641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf275876cfc3f68826b2023ad6cb8f4f01418880ef4c5a8ff0937e9cb69f7ec38. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB72320521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7067caa4dd7010734af30974bbfca0f7f87693c96a01afc6ff21aec060440d75. 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/QZWFP2337370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7067caa4dd7010734af30974bbfca0f7f87693c96a01afc6ff21aec060440d75. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFP2337370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530bf7db9e70390d0495f29f2fa2cf97e15f5ce1da17dd4dab52448b6ce97979. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CH7812403926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4afcd453dbbc10988ff170bc0daefba64f39b2701395a8c156d29c287fe9e1. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CH7812403928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637ca159711de87a2b2a15aa12e7c4e131194c30ffb07257df61381b7164868b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH7812408549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569bddf4f318f42415eec4a5b1a100afda338b8a25eb6620728e4a9231085e4. 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/DEVY82400030.