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 0x8426435dc54d5d8085581b9907886c0e877135e242d5fea5732484220c9739ff. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9d5e937-2b87-4402-8f23-bf9982750903.json and https://artists.proofprofile.net/proofs/artist/f9d5e937-2b87-4402-8f23-bf9982750903.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 0xa26da5ece0783a2b4413662c6a5b1a65b9e607df4c2c2e46092fe95a77c7c44b. 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/TCAIA2468413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e96507a7f45a36db1149ddab9ce3fad6449ffcb84395f7a4fc08b021e29dca. 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/TCAHY2493745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3836a2e30db65ec9dc6d8f8812dc1e8290911e120aa890637d508d56cea1f5d8. 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/TCAHE2307839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd773f2d2bad87d4f85111f33d2c37c04dfb45eb41b7a8eb9f2afa06d84678165. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAGR2234700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76ff1460d46098aac5cb51d97557ce5cb6e0326708c763528e89e977d229ef. 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/TCAGR2234502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec46608beabaf589e367585aca0b909c661b3c4d77596aad793665cd81d35f3. 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/TCAGQ2200334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4458f4d54c8e159cf306b72dc845819380ce55a342b313aed48d747acd2caed. 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/QZES51999905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a1744f8a83c769b19a52b03a42a77e1857e0f8911901efbdd7a2a3eabbc202. 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/QZES51999906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76176163ef11e39fd353c6b6813b918d70f62dfb9e9f3bf22e26fa2388421d85. 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/QZES51999907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a03645a92db00903b6ef5cf1248ab9bfe33d22cae733d5e4655ff5d84636492. 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/QZES51999908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b8da60d1601aeb0c6662c1b0c64a3bcb66da308e6527ac6afc7e11a0e612c9. 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/QZES51999909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eefb3d4a60c59cd6732b4b0756d0e9a51e9150cf1eabc6a04833778b74828e. 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/QZES51999910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19fa2f476566fc80fd50a921bc83c3141ae75f458cbe9cc11d97b7e41537b8c. 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/QZES51999911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16761b14eaaf9b70b47da341cd4c469cbbe4c8e90d1dc1cda71d974579439fa. 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/QZES51999912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c43358dc94cce9fdd820b0f95b3788a1af560ee68070aa92f6c734745d539. 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/QZES51999913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db95af317f0df01f33a6f3e45ce3ce676c581a0a26a6c66b8b27758ab11db3. 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/QZES51999914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579601329a6baf5c2c51830e370e6844aefd57816b6b42d120991d4f2a010dc5. 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/FIWMA1300336.