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 0x8e712f745eb4c99ee846a0550c9e8cc3dae50ff4963f84a3e7896c43a983c26f. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58383ea9-419e-4de5-ae95-35f5048498bf.json and https://artists.proofprofile.net/proofs/artist/58383ea9-419e-4de5-ae95-35f5048498bf.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 0x3878bb94206f1de11d552d1d2511aa097c6ef3866ed3a23d30cd11f3f072e428. 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/TCAHB2396667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4939c231c4036035a7b2282562338ee58c76b04d019e62a12254a3255be0ba34. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIJ2444562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f6b8caf0c64ecdc58a0972f29b8f116b8442460b99e3819de4ff9019f5ba93. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/TCAIK2444622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b93a29f78b1fbea9644174e0770b8e1455db8592fd5e61cd7c6a005695af06. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIJ2444631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098949a2b0160cb3f65d64be8426ea55268432f12b302ffcd74aac2545eb1c5b. 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/TCAJG2549158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d25966d2dffe70d6cd2a520ac8c014b1a0dd6639fd93c12d6a6362de425575e. 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/TCAJG2548922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee534c63e661791e0e33380cdf4566243b6d843e153c5483c88ebfa3677583d7. 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/TCAJG2549012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c15b3f1f9258e3b8e1b6c65f58738ad7857d3071a504fa235dc147f13fc64d8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAJG2549043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f84297cd8d833d70383987fe6dd438e240477ae83d07fce4a68cf2468db66f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJG2549076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7208bfc53b6df09b94050920336a26f20dbb94da3de5163b07d9a805b9c6a4bb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJG2549091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf471bf7d7f67f10434219c0acb640a41f9a0ecaff9c86cfb1ebd6a25c78264cf. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAJG2549134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a337dcdf886159f2dcba2a76cbb4b91db06b7f1b22aa78947fa65534ade432. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:44:40Z), 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/TCAJG2549176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dddfce28317551938fe3cf93850515bddd3ef34a648f9ffdad0308e42034e1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJG2549225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8883bca0585684217da1b8defdc5bf8a7f8a8b85345055f0b4fcff2bb756fe51. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJG2549249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88315369640c5c7d4851605d11f83f117a9a0a43a56bc2a567ce27203e988725. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:58:19Z), 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/TCAJG2549275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa58eadd17386d4b98cc431676feaa328655f53db2bc0ee18bb91f08c9ce65c. 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/QZTBA2463025.