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 0x0d4da54d0378e56e29b9b2e115bb52c5fa7c171f9ca663988290c4776cf225fc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5023a551-ca1a-40a8-94f1-e007057597a2.json and https://artists.proofprofile.net/proofs/artist/5023a551-ca1a-40a8-94f1-e007057597a2.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 0xfe37691c8f493084acdb24b524d74d03da55cdbc597e1033c9968a5afc2fc820. 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/US39N2310768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f47e6afdc998004c9923de13fca8ccee547b6169eaeae1f8d1bf58da4c3ec. 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/US39N2301586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fdf16a558ca7df52edf7a8c3db5a5ebf4c71a056277012d5af8cb8cd7be725. 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/US39N2301577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd52e24d00ad3906a348707d9873d213c32b4eb3c4fa8c960ccaa92859f0e3d5. 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/US39N2301578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23da867182f8ad03547bba48af6bb6efe4c4eb6b166859e1f552383e172c282. 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/US39N2301579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1427b5a5d491349b083ac1aeae30fe661e07c16a8677fe3c05c8065123eff9a. 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/US39N2301580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab23394f6a22e4f20063a14bfd39ce4454b66900ef1edbca5cd57ab8eb4ec4. 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/US39N2301581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9296ae25a141ca8f42e56f187c946daaf27822f3c623a039f471facdbf41c885. 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/US39N2300870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a46f5cf22127b80ba0009f7dcfdae3795390f3bd9eb348d0d022fe7d41e9b9d. 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/US39N2301582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f47e6afdc998004c9923de13fca8ccee547b6169eaeae1f8d1bf58da4c3ec. 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/US39N2301586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbac229e40ca166747379da893575ad172350b02797216d57b21d7d9b21cef1. 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/US39N2204441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9581b7224ab15f3f8727ee81e73688774e1344de3087a9650cbd4b2c226aa139. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US39N2301587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7e7458da0687f6797729e1bf1c66a19b7091bf14669846faf8aee860dde1f. 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/QZTB22386741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23da867182f8ad03547bba48af6bb6efe4c4eb6b166859e1f552383e172c282. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US39N2301579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9296ae25a141ca8f42e56f187c946daaf27822f3c623a039f471facdbf41c885. 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/US39N2300870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbac229e40ca166747379da893575ad172350b02797216d57b21d7d9b21cef1. 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/US39N2204441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b404a0622b85720257a2ee1000cfbf8fd07f84e0bdf6cb4404172e221ca8110. 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/USZ4V2100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7171371df3478f17c7aab68b20e82fc2b9bccc83f6d8b244cc689ff43fc264. 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/USZ4V2000255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe875ecc15edf9b57f2cc454fd90ca978502b4812bac695933554c7bfe77810d1. 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/USZ4V2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c99933ea804e3560e7894ef01ec48a57514450e2d03d2e125f5c5044a9dafe. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/USZ4V2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d51e51792577e079fb519c6a995da2464563201a730fe4b8688ddb6a8ba0898. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USZ4V2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c99933ea804e3560e7894ef01ec48a57514450e2d03d2e125f5c5044a9dafe. 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/USZ4V2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7171371df3478f17c7aab68b20e82fc2b9bccc83f6d8b244cc689ff43fc264. 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/USZ4V2000255.