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 0xd3b43b6fd1e3034af868b9bcda9dbf9b5a073d5a9d5f505c9a3ce3c3ada9732a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa7e8fdf-d8cb-4a63-984a-53a0e3c53e53.json and https://artists.proofprofile.net/proofs/artist/aa7e8fdf-d8cb-4a63-984a-53a0e3c53e53.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 0xc69b5d14769807c433b8906289c3307abd51f59d60c183b86f8473b5b16f4dd3. 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/USMBR2014258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75244befb6f0e6c2ae2e6c28092f55b9201ad7659ee04fe885f5c97c21b56f4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USMBR2014259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096ce1096eda3120589efd2cb89665284af3fd7715da1b3dd99d1a0da79ea71. 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/USMBR2014265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56f8b89143a9dd32590ad07ecc55c54f63ce7c1e23334b81461fee3ea367412. 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/USMBR2014266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c000458e4051b2255330248d1ea88b4f717ed35803d149421d8cd139af4036. 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/USMBR1712189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fcfbff9b805e8ba118af35193748a4735c33817f16d40d8caeeea6159dc817. 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/USMBR1712195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa894b0bcda99564a62937b9cc2ad677faae154c21f9d5b2e0d718b4dfba2428b. 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/USMBR1712196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d45c53cd250825adfa81943fb50c6858f9d70fa65a1c7300c62923c95a2fb7. 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/USMBR1712197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452e9b59996ded14a5bfa046026aa47d72e84d4537909ed28d7b3619fb5f35dd. 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/USMBR1511472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93031f6a93ded6d7e6c65095eb414e119fa5f889178c8958f39372c6c44dc607. 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/USMBR1511475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13776e4754e95ab120eda645332ca8611a5d7b1059f897d455ed3075f5d23de5. 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/USMBR1511478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8681ab54723387bc0283db47b26439fac9a1661e41a6800c3c080270ad8ed7dc. 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/AUMJC1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d784c8bb20c859c076d5d7e031c5bf95842b336da8eb73977ace5a4daf00e7. 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/AUMJC1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efda144e3893c3ce42cab9f19c762b760de61facd0bad42b812cd7bb1dd4aec. 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/AUMJC1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35687054cba28ca24ce7a21da1f214baee8bb5ce465410e0ce9ffd66eb0eea8. 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/AUMJC1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1356960c1b5be11378680b3b3886d414c3843c65cfeaf6b01f6da563d8c339. 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/AUMJC1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfde842268595dc2a50668bc7f232d32c4ab5efc33eb678e861812172388eb24. 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/AUMJC1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6c934e1f51df1058aa125a4459d4ef80c944835f4442e31911d818b6fd499f. 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/AUMJC1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69b5d14769807c433b8906289c3307abd51f59d60c183b86f8473b5b16f4dd3. 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/USMBR2014258.