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 0x7f7de577f100d64ae20adee9fb71c4c674c4a731edd17aa2a82404dfff6066a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea569f76-92b0-4a74-a78e-060161bbb1d3.json and https://artists.proofprofile.net/proofs/artist/ea569f76-92b0-4a74-a78e-060161bbb1d3.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 0x46029a9d72b43827f1bde06a4486df36f18bea54594a581d6d33c528a04a5dbb. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:29:03Z), 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/TCACW1729381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fded9a22acfad086c6c68c3ec4b16d2a0d124cfe4ee8a67e638a71e6a956172. 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/ES6101800184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487f9cc11c157531308fc33e34874cb70190f315e5ca041c2728ebd9b1be7f0. 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/ES6101900472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59b65db832d771a88c39eba998ffff88f0252742e01f526e27a83c7cdeaf30. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92083866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1184d6f5b4fe1462074a8f664ca8f78aea411415c6676fbcd1b4f667cc7fd68e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:31Z), 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/QM4TX2217900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1778854136388ae40f0d16a6bbb014eef2f5b1eebd8020248577706ad3b1bd4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2253811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ab7e72ef7e9291caa4c798a635c156268fa2585ff69d80815738c37668c1a7. 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/QM4TX2217886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59b65db832d771a88c39eba998ffff88f0252742e01f526e27a83c7cdeaf30. 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/QMBZ92083866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164ec5508cbece3b0f0e660e14dcd75d550e8aa6356eac4fed3202d3ce9ca682. 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/QMFMF2100803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53235b422913d4784804377b8d9fbb8888bfc4671e1510a006e3fa8c99d9af0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TX2217897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957eb94332180c48b9525d93a3e985fefd16cab86f600793eb4109b06dceab39. 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/QM4TX2217898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6290a4f5cb93dd476f2c1b5b0754e6eae7ed2efbe1b6d3560ea80d240d1fea41. 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/QM6N22074117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc7a5101fe3b3080d966e7ac1f74258a2bc6b9cabd88263a474ed493e5f92d. 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/QM4TX2217905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18731404e97aa4e973a59d334861ae637998d81e8586e9b23b19c6698d5a4bb. 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/ES71G2043226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207d2e69164ecf14dc690dc27502c9f88e823d4ad772bc9801edabf2d550e3d0. 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/ES71G2039116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7db51a5eab91010300bf1923c5d1cd320f93ccd6a230d8d671b9b824d43068d. 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/ES71G2011407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeebf51790b09651472a3e0846b76f0e1abe46d1c85f36c7b9a705294f5e631. 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/QM4TW2112161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b11e71333808a7e511e7211768432c4e47fd45bbc2f4925671680a308d03c86. 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/ESA092334053.