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 0x9353a6f8dea312bd8d5af95f065f56cec55fc2d0a6794cffd9d894395835c4c9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3b35fc6-2869-4dc4-ad18-6596bff95f6a.json and https://artists.proofprofile.net/proofs/artist/e3b35fc6-2869-4dc4-ad18-6596bff95f6a.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 0x32a4dafab8942079f42123a005d046198dd4a12c149cccc440b689731a8d6b42. 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/QZHN62178597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12762c84eeb4b527ba937ad023d52e34dc77e85f5649b7229e7dabb4783f1329. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN92167425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a08ea7c2e912fa120f1fd5341dc473835b01ce43dcce34a95f52b0abaa484. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYX2211839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31861376076d1482c17c2847222baf7455b437a09b6f2d6596f05cba632b9bed. 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/QZFYX2211840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56eb408f76b11d4925403d6f766025c14e0c3c344de8dca1af59df043a0fa38. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6H2159499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fba7339dbf9d70849d4feea5f45be00963190d927d34cbcd59e22bc6f6ca1b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYX2211843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dad5f4bff5ffcabfceaf4b835f30afd3c92eb22865b89fff5b60b7fc635c351. 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/QZNWT2205669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae28e01701b36891bd847e88ad8db9e895ddda8d0c1ce602a5b4298828e8c0d8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZRP42295668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7661d9e29e58c0b9ad720ec81b9e78feac1a8743cac5eb2e8895a267ffc4f5a2. 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/QZPLS2215709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2620b434afdb635fedfda590476c765d2dcef51a5ab09ef5fafd68664553f78c. 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/QZES92304594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546a12d19c60dc584bcafa27e1fc38508aac57880f33d993b97e48cdddb1f035. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:26Z), 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/QZMEP2479242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2daabaf966b7f4c92ef90c6147c54a4759f0ebfffb0ad42026e2afc9abccded. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:22:23Z), 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/QT2VB2439686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828ee5eae4277e7aee216e6a8925d44061721cb248a976790c9a1d7556f65e8. 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/QT2VB2439687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a97bc0577cfabc730c8ea548b198eef10efd5e4c52cded367f3fce5ae65819b. 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/QT2VB2439688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb1ff31987717cd24f048bcb4c0e635f330f36a465e41e03a34cbd41c7ca24d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT2VB2439690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419cdb6991332edc08a0cf5d7d730549a81a56c7658dfdaf0da933b8d452da0a. 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/QT2VB2439693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e77f035c64646820d9685083af477fca108d15379209d1635153f23d75cb19a. 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/QT4K32527869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ce5456d521b999825c4c1c5aea3177605081411a19d428c425226a7eb0c14b. 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/QT4K32527871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bcca3c6513c275dcaa5e422bbf255b117804bbcf0f1dd3b82673782298a995. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:32Z), 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/QT4K32527875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eb0624960cb5cd59723646ed9a044380fefcfeac4db74af64fe63e2f70af86. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:30:53Z), 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/QT4K52587671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7cd7899dae5f83756845d2cac00dc88540944a3360c575d84b944c0e0b53ac. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT4K42567290.