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 0xf9e667b4a17ee577749c01d0a275176b7f21bac2c985e8cba83b13981d2f0dca. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24bf1eee-bfb8-4724-8397-ec6f0619e195.json and https://artists.proofprofile.net/proofs/artist/24bf1eee-bfb8-4724-8397-ec6f0619e195.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 0xc08419fe7d5428f78d7e6dd04de801090812cae93c068e9451830e5b3ae4601a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGC2227712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986a40bf8eb1ab711297cd067b65047d0d3438799a1e596a0dfe8280d45163f8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:27Z), 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/TCAFP2110797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74f3494ef703d9994d448702d7e185917f44d590185f0cb21e65c5ff7ad1a96. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAFM2164023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f8f5235d487d17f218791b246a40a3976d5668f45a6e26b53f8dbc31ad97af. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGC2227727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b91aad87b1550befca30e288407c813c4a62e103cbcf3e322e8558d5e73b180. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGC2227729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc450bc5933a4d9f14a6c11ac5c9aabd6cae6bef1e651974248c97cf6b27df0c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGC2227728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9c9e1c4f68840f6e9e9aa5e86bc53837769b672a7052b6b62b8772fb17a489. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:45:36Z), 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/TCAIU2417936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ac791b18716d56e6bad4b27335cfd375e7a8481c12df93af6e09e8479ac725. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIT2487513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe206856f065adb3851e53b9a5660b756a14c0a4d9d6b55cf2ca9cac73a1c7fe3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJH2528142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4034aa04a87996d7c1e9f8a710c051a683e2a134c8f13d9b9b281e34f9c377. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHU2496054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84af144cc10b262e43e3b51dd73b4dffd987dff5a6c835a32829b21342816c4c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJS2589774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe965e848cd606a68388acb3790c77fd1c62ff2be4499bdf1f7ef23ebdd2fe63a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJT2589789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5161ab9c762927287c07346ae5283a43ab04fdb3e873705b45853f09e32d1895. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJS2589801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ac791b18716d56e6bad4b27335cfd375e7a8481c12df93af6e09e8479ac725. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIT2487513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4d1fa21c55a6e2e2b91929fc941b4bd94ed52e2b54a94fed38c96447d1f53e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJS2589848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe206856f065adb3851e53b9a5660b756a14c0a4d9d6b55cf2ca9cac73a1c7fe3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJH2528142.