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 0x8a64721f5a817324ea5ea7e63a06ca0a0f76fb089d20b27c4be30509b6718a87. 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/c5f3b621-6584-48b4-94db-bb74d09e4d7c.json and https://artists.proofprofile.net/proofs/artist/c5f3b621-6584-48b4-94db-bb74d09e4d7c.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 0x47cafe6b55b5d76950e80c593dd46f294a00dd5b463cd502fd3808c1d151d750. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN72139633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b39cea9b59654521995a1a8d9f9e1cbd4071f029669ef31fd29476740ad5d1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHNB2109009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37c41aedddd0af2db502a7dff8181f5db73a24845d31d5f731290b3d3ec4e5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6N2111368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60cfc33d10b7d562bead403c37b300fc203dbf25c3ab016ef6f0f756d879b14. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZMEM2103961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd42f381d85b6f2829fd04317beeb7b4f37da1ba164ca1a93afd4f54c3457875. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:03Z), 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/QZMEM2103963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37c41aedddd0af2db502a7dff8181f5db73a24845d31d5f731290b3d3ec4e5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6N2111368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf490f4fd98507dc303cc0595e8ffb1473f261e2f1a3c5c9b72819084fd7d01c2. 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/QZK6L2160684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3706f77fb4b509a3f4985154d62fd7a632fc74816ce6fd07fc91b820e92235. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZNWU2178995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b0af9a276a10a56a5feb52c513249f24956ca7384bf0cc93bc0e7f6b3e4a26. 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/QZNWY2163465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955b14bb5c95886a2f132d8eb46559fb87c699379d2edb513964946f66842747. 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/QZRP42106636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f46bf09bdc4fa49da186de767b368a2396d5710c8aa0ae410bf9731a54f0dfa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ42220248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93793a7db39ec071ff41062d9149427c0aa15e8451da10824d07d32245c08ba1. 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/QZES62256560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32978a03cf49f35bae20082e22f49ef7f7d39816f8b98817f47b02bc309ac0fe. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6N2239934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d6f2f0070661de2acd396be994b7167a274597900728fdd19ec712752cad5. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZMEM2221606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c48417616e964c05634359cdd9b9b296be776f1a4a2dc06c608c091320f4c1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:04Z), 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/QZMEM2221607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394b4baca0d66d4970129384a353a49f53aa2900b5d722597a062d365612bcdb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEM2221608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00342e950bb51cdf978e4867c996a9bf9e1605093dad46ceb3d91082915107cf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWR2220429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f637b7ca02c46fc6c9a569cfabe7d926a6be38d2e41907f9fe1ce5fb68777cd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN52314502.