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 0xa3d590748b9b8e26bc9a0d91c65264367f7ba4e294e1f1b178338e61e3503bd3. 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/c0e13c5d-bfbf-4ad9-84b9-513326680e97.json and https://artists.proofprofile.net/proofs/artist/c0e13c5d-bfbf-4ad9-84b9-513326680e97.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 0x7ce03f0f74319069633f6fe609c68e02f036f52d73cd9e405cc4cea350c1e84e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA011778855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5358633ca033cd3a21e354b877ef81a235e97ac2006d6f5dcbbbbcb9715afd9e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES09S2200389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81282475d924f231328f78f5499124d8dba11c4dc5d7932d94587e0213b54004. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES09S2200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925fbcad755ba036fe97ad432aa05e33b9422046af676071693d4fe988450c5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA012129942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb18fa23c00ab8be6d3f8d1ac1c9630f9c73c0995543ec626e9ade9dd865024. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES09S2200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0d0972c67d8c5aac87564439ff9e68e3ac0d355c2b9facaa203ce7c6419ad6. 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/ES09S2200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc268a3164c8fe02b6a62f5c4c4c5484a8edb9d2a9bf95abfb47d066fa8e0deaf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES09S2200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1074b06f3f790a1c1f92c7b203df78b6aa58d71b5659140b0d85b2dbd7dfe2a. 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/ES09S2200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bbf41422586b17d616ba9bf86fa71b1a6bd6da24d9d652cda6a8c280b451d9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:39:41Z), 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/ES09S2200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0da85b2e7f960d64cac8be4182cc4459e6ca2851057ce946890af35fa6eeaf7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES17D2001085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b78bac23561bc070d4e0d43af10f61e36a376935fd9cffcee2c0ecb4306b99. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES17D2001086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2016ba5e4eb3ca32d119d3a4dfc001d4e557a05eeac68409db27bdabe12603f5. 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/ES17D2001087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e720bc4baf58218fb84f0fbea6643b358b8e0bdd8788beb6ea932c808ae857. 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/ES17D2001088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5987e7259e5053b44a67ea9096bd49a3a7203e20a76de2e9cf2b91deeb12e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES17D2001089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e5eb147c7de24fc9a88ab74a400421822bd9c56161f082c6d3f43bc3d2c835. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES17D2001090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dfbe9e01aa67d0f074ebee7d52edd6a5f98609a989e94c5d7b2075eda64e2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES17D2001091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad69eb69e1ae01fdc17224dd32b31a04bc46d322a3cbb59d53391c489ff6ae33. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES17D2001092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336e691553e36ee6027f8d30410644ea9d0a5b160f6ec919e11fd866229e5635. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA011692440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2135e664b78114cc307203762c82ce8d5eb032f90112be8a99022da31813da69. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA011692441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e235035ab16f0b8b21d14d8f4a35c5e14b6c4bc1fadbcb1bb287feb43539916. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA011692442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925fbcad755ba036fe97ad432aa05e33b9422046af676071693d4fe988450c5e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ESA012129942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a91a3e1f55cb4cc6769b306f106802a45b7d821ca32ada19e61a2bc12279f9. 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/US6QR2300122.