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 0x7466d7ea75ba5867855003f7b879035eb4e2e8e4ecf7d2eddd56d477a7cfc97c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f6da190-80ae-4db5-a085-13e310234fdf.json and https://artists.proofprofile.net/proofs/artist/7f6da190-80ae-4db5-a085-13e310234fdf.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 0x5d5dc5ff05558e32ed431de75f21a87d7a57a9b3536ab0f1b5e6037ac96aec98. 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/DKF3Z2300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8abbae52869380239c9901777295bbc3b15ff8fb1693687a947bb63477ef49. 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/DKF3Z2300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938f138bb61ab43e7fa62665e59216e41ade230cb21e5229c42c743b9cf9d628. 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/DKF3Z2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b366403ec087c6b6323cee04966afc664ec1b206fa7ac2791ff6a7c78f50a2. 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/DKCC21600903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81471f8482197de07ac76af88ed7707a1244250c4234aabb48f358f573cf2eb0. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DKCC21600904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28941565daa355dab1cf10ece96e7e4d07af8d21a646565707571f78aed8037. 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/DKCC21600907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf1dd0fefd6bd69f6f73a7087c8dea4e5dc5c0a0992e6b7ffdeee3d4127769b. 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/DKCC21600909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889d7dba38773f913c1768c18b00594324b61bcf30cee177bd29aea844a0ad1b. 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/DKC3G2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a25cb222f4addc1e029496681129675d9f488c9b639a3e5c3cd39f2b4c96f56. 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/DKCC21900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d84bfff3fdd449a6372eddee5ed40b377fee1031b75a1882241099812cfb69. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DKCC21400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6139c74c247b8855d2c37583e6d9460836ddda168767693913fcd2d51dce1744. 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/DKCC21300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d84bfff3fdd449a6372eddee5ed40b377fee1031b75a1882241099812cfb69. 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/DKCC21400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d60af58070f80e186af70d328f64707239b50790c1fa62dadd8cbdb296acf7. 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/DKCC21300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb76be22c5862388a42d88f58d33eaaaaf424e3d4c95f6eba81384bd21e1fa6. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DKCC21200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b6205530e4b592f54224d3772361899b8a1b931b2027d96722bfce314a6b00. 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/DKCC21200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f82e4d68a2656b0294c076357a586542a9341c2b15d5ce20cf15abd775e47e6. 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/DKCC21200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc5043b06518bc9051c4df218777c7979884b73d4d8a44c070e3149b2c0aa6. 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/DKCC21200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06c87106430a540c497000c21e365d78e7ef94f83b2b9ed3a5342da88699a10. 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/DKFD51168078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6d391f3eb0515eaaa2cdd14c2e2632eee034b31e4f690eb23748aa24b0a2b9. 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/FRX282408772.