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 0xf372647a80843c58e037cc44d40962e9d27d88a14320bb2a1dcbd25f8d697d2c. 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/80a30697-1b07-42da-9f03-3a9d35d8614c.json and https://artists.proofprofile.net/proofs/artist/80a30697-1b07-42da-9f03-3a9d35d8614c.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 0xc32b6efd47f22b393e5a7c2fc06de60b2ebd7d5dc422ff25eac2742501cd9410. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZK6F2086805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0581a1179dc746fe885b68114d84763c0df3674af5522e5d45b855441778aa2c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2086807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d213f751f2c0357d3097995a7a9c49e6fa9af9dab7433edb45a335ec3c7bcc. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZTAY2282028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee06656a9518ce93a6392c30203764d9612062546083189dc874cd4a01e56d84. 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/QZFZ62553007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbb72ec1731c059e4a65d6a7314a0a73f2b6a59e96e2cdd027533a4ea22d4ea. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ62553008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4600b89df4fba721228c101db4ba7daa5681f31781900ea835f78a74613b02e8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:31Z), 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/QZFZ62553009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b985d340aeb358b458c34239ee0be3653ea88f30856858ca95efba24e1d2657. 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/QZFZ62553010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa2ea6469c657700ca143fa718aef6c1a09cdabd78066d3d2b3cc7f75ec4e2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:28Z), 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/QZFZ62553012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382c27fd4ec2ce573ca975b30ab3b649df1c163f21aec509115cc55a94b320fb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZFZ62553013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7903946e152187623333f7576d74571ae893e7b45d066e2765bcaf9b3ebee371. 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/QZFZ62553015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f92dfb2fdd3e5dfff92d8e1edcae29dbc30ec7143fec64949eb631e6fff5f57. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:22Z), 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/QZFZ62553016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298a2c858a49e7d138c67d8ec1f3df3d3b6c03d4650b9db3cdf6737302c15745. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:57Z), 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/GX4R52548074.