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 0xae96e00559f99fe5b4604a3e96667f585cb30b11b4342aa9756d9be1f88cac1b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74ccc167-60dc-4d6a-ba9f-950bd0fe02b3.json and https://artists.proofprofile.net/proofs/artist/74ccc167-60dc-4d6a-ba9f-950bd0fe02b3.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 0x1e64a82705f455b8a2017e453bf885ced212e03b57ae2e2482e8c5cfafe3ad87. 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/ES71G2412543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde442bae240331b8b48127ddb8c0e101bd3325bdadd13abde6eecbe2ba4da6cb. 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/ES71G2416883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64a82705f455b8a2017e453bf885ced212e03b57ae2e2482e8c5cfafe3ad87. 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/ES71G2412543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30064762be0be12d59e5565004cbd34020ca6b08416bad44456cbab555a965b0. 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/ES71G2410997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fb3ba176b1e7c8693e0414e11b18cb81a1ef9496d5daec7368674b40a0c0d8. 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/ES71G2407754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f257c9abd00c8b8f4905211179e967313abf4e5c951527d1ecdf153f12746ce. 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/ES71G2404965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc856fa8407d09937a7c892a2444755f17a0728129b914ab00ad1fe001788e5b1. 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/ES71G2335299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677213b940341bf0ea66857c404213953f2d7cefc1c5ed1eb7badaad4c2e2ffa. 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/ES71G2338266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822083d4d6f8ea32b7d9440f579525c6385da9e1a5195d62d1b52c5c8079002. 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/ES71G2338267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc856fa8407d09937a7c892a2444755f17a0728129b914ab00ad1fe001788e5b1. 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/ES71G2335299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eb482efe59195dca9bba7eacef5a92f9d249d0614737f73ff4b1c115587471. 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/ES71G2330311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b80fa6b2ee64920ba12f42aabb205cd0934e0e122949881829210a0b93298b. 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/ES71G2329707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3b0b1a700fa77457a8ec5c5376c91680515a7326d6440ffb6c3db83e47ba1c. 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/ES71G2320014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307283023f893db1ea569dc89815282f8b5958fc8c87753eaeb0db814827d7a7. 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/ES71G2316933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f5167ca3c79b68de69be86a62272e01c3cd1765a3b2e9b34f14a38205d0d16. 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/GX3Q92363633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a84a460c067e4e00a8a538ba92b80c3225641d73f8e6037c912e68daee1041. 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/QZDA82143591.