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 0x32c153852e36bf14fa106ca2cf64e2403376ffc3f194f304368175fc19bd73f5. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a11e35f-99c0-492b-9be9-20ef404e4472.json and https://artists.proofprofile.net/proofs/artist/8a11e35f-99c0-492b-9be9-20ef404e4472.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 0xb3e8da01a49cd104503e4629009b5bfecd02638d56fb26b9d6cc24a9601b2c2c. 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/QZJDW1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b12d5b8a30c56bb06adfb5a60d6142277cf1b6ed4abdad309596ea6978e36. 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/QZZEC2319994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf549cd526298f6203cf683e45a70f7ff62ec340b58a16b0ef9e35b82bab4abd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZZEC2319984.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317e5d345b4114fe9903c565f69b6ed861a676a9201fc205eda63ed138d6ed99. 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/QZ5FN2457357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288c8bd7e35796a396ff4ee0f83a32e248ee3d5e77455dced0d3bf8f75233af. 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/QZTV32303947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c9a340a7d77d3edc53c4a6da2aa8259a399f69ec1fb74dfd7202a4b3f462c2. 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/QZ5FN2416373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56317fe9dda9073dfeb0c10e71a0046d053f14c256079b4d1928f38887159939. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5FN2416388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdc5211b128adb3573206319cd3c7b62f596b65e81d9a4f5790777f4eba3876. 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/QZ5FN2416393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb482e4066f9667a5e2fe617f09df1f1d4ca71e4da297c479c38fc4805b6762b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN2416394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f6434b3ce8db2a157ce0ea3baef5400f602ea14e92e1060189bd68aae19e88. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN2416398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec6ceaf0b8213bfb58259ac28c1ee1eb174e85ce71de278ff310018c6eb372. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN2416404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23a961fa1d31b6cc0eb7bb4d4b6d579889c78d034ffa67344801601a51590f. 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/QZ5FN2416409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b825d2b6b187a5afabf72abf57f73f362c03bcffba55e140dfef6b0847423b6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX1915658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa109f0cea442358f14e1b8d863cac2c79ab4cb35ff78c716748d29d205c3468a. 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/QM6N21830235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55dd6dd5a59d998a3853dc537dcdf57dad2fc08b1097ecb1942ee8b3dd451a8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBWUL2490404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bb2aa74378be17c649e92b89b3aeb84250cce5683bd2278e8c5dad960ea051. 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/QZZEB2329393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dea7c964a7ba8df9983d3b8050aad9a15346251b2ded8a0c3b62eb608c08019. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBRKQ2313641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241edb9cedd642c259a486be994b124a11a25a927b927704e2e8df086d9be82a. 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/USLZJ2383613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be35cadeae13ea4e18aba914e4a93ddb38b6987a7f9670d420e461963263e9. 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/QZKDT2200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1ee9987c7a5d408c4de9ea2d232a57c3a04e6779feb02b292f9bd1b258caba. 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/QZKDT2101180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3b183467432f1d5101923158cb7efa4bb3196b6ea8b970a9c23c684b93fcb4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1218933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6fa71fb011880df93a5601d9b34e5c41a96b148a8574f3d9fbe77b82ead3a. 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/USUYG1132031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddb14391f81f81f9c76823b24642c7a67f8844709e5f48c1e570e0efab79c5b. 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/USUYG1259417.