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 0x44ebfeda1cb16ffbdfdc9bb0804d0d3733a1b258eabb3c7dadee82b3bbd13a71. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a5f25aa-2f26-477c-b996-9b4d4465c114.json and https://artists.proofprofile.net/proofs/artist/4a5f25aa-2f26-477c-b996-9b4d4465c114.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 0x02975e6fdd644325021d31f424176f5abdb3801f6ff62b6d396f5914a68c6ea6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:38Z), 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/QZWFS2504082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bed1caf0c443ba514fd9620d96fcad4c1b80a59002e30e93fbd62f98eb973f2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFS2504083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb721ced0b2c9eb55ca1e234dc6ead4e631056d4fdc08d0283802cecff54d5f1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWFS2504084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942197d463295dca5d5ab17e8f3af05581db1d993535c93b939be9bd40b278cf. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:35Z), 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/QZWFS2504085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5ee9624f801714dcb1fa76c6c477665cad1ec28fcdc7cba26fda5560653e1c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZWFS2504086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb290c5fa2a030a94635a81b88dc8e691cf8a8a09b6dc647dda3ca0ca7a293c80. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:10Z), 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/QZWFS2504087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb84d0414083576591c17c3cb3107e7d5598c07fa6d8d7e96bed52e80fa8174. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:13Z), 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/QZWFS2504088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa633cc21f920f1aad3e1354781fa451bdf5114a638e2a4cfc38ecaadf33409dc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:33:28Z), 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/QZWFS2504089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a7b6a17735230fb59c2957c1d22931f71f64e7b79715b99c8af94902df9892. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFS2504090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0550bfa1cdce7de5179fa97836bdbc7cc6f434f54d6026b9a3b02e642fb2e25e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:59:10Z), 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/QZWFS2504091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea3c49296b9b998af3e2e5d38ea96979750dde64ab956513429bb08f4197cf. 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/QZZ762522516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5926366b656b1a387044386d19550927c8a28c05995aec6991caf15a5250a541. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:29Z), 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/QZZ762522518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc16cb5ecaf8c71aa0a42e0b77b8983db016a982e4ce7005798145e3a61d8bfa. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:08:40Z), 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/QZZ762522519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe892d7b403793f5f5a51e91d3d37cd112eebd24d679238749489384e4d7a5b5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:24Z), 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/QZZ762522520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4065cd1ec6088c7919c2701a22d850305664e0829738a508ea4615db28e7b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZZ762522521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b25085ae7bb1be31dc9796080be85f3240ab2b38f19ad7a1aba94c9dd17adb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ762522522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b94ef9de8aaf2bdd9d7168206c80149e3376a8d448670ab65e25287f6b1688d. 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/QZZ762522523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a346bbc18fefde12470f1ca422d0a236d2ec30c00ec26bd79b88859383de46. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:29Z), 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/QZZ762522524.