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 0xc48115b109c66dd9b6eb6ae1c0dd06db3e20dc31055e7ab83ab3d423169552f7. 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/dfcf5a42-ce4c-4d45-8a55-b9d7505d089c.json and https://artists.proofprofile.net/proofs/artist/dfcf5a42-ce4c-4d45-8a55-b9d7505d089c.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 0x09ff0df1c376699ef854b484cdcf1d4440c32bb9ad7c4fcecb5241aed54a5ae0. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZDA61873961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5c5bb4f5631cd288735e50340f50b5ca3e32d5139d0bb64034a85d54ae592a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:41:17Z), 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/QZ4JJ1836849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5fcf843d0093e946a4937f3f562485ea8f56465fa4a892a6a9a9712057cfad. 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/QZHN51940185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0d60920363e9639e551dee5edef936450dc316bf6eafa0e095483673583d2f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZHN51940194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f66e6aec7c9d359c379fc34c84363c76c139fa282f18cf31db9d4346f4af4d. 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/QZK6P1976917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddac5ace74a13cdae3c0af626be004cfd59b69bc4384c77ec7b9152e0a9d326. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6N1959928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ce4a9344aa9ccb24ea38e85afc2c10de1ffa24ea5241a6f8cc28240064cf0f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZFZ72087174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031c084e223d0c85c1b406d13e6cb2f196e04ab1a3c5261cf1d9b57c9183889e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:25Z), 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/QZK6F2036173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c35f69f8e9df72dd49bd6be025a26510b5d19548113566f18b15c930b24a47. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZK6F2036175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb60e9c7d14e631685e3ef2aa0958416b197af8a91cf3ea99fdb4ccc2677ccd. 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/QZK6F2036176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba52fff1c9a683846a9a3670e1cc03b3b2e3d3e8c8bba581b99a68d0b5ae688. 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/QZK6F2036177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3371453174a91ff24a6c912b4b90db2dc705fed295c9637ea84d88e4e4dbf3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2036181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f1b4253af62a1a5f70bd7aabd191a9a905dd75a6622b311a1d4c523b94f596. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6F2036184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc086f07d1c270c4ee03fdb117b293173fe7bd076cf0aa6f321a02005d7417f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZK6L2119969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343c4a06a6bc7b3fe7f459366e8d920a1af193d2f8e15a260ceb3c1d54bb8181. 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/QZK6J2123709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2db4fc8a30350dd78e4a1fed278c9ccbcd3933332c648714d58b479f57fdf8c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:07:28Z), 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/QZNWX2266408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932ed97678cad411375c5df9d84d54f277c0a8ced911b2df50807cd35b9c988. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZNWU2393573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e04870e6dc385aa3ccaab85b979f02b3e8f9ba27edca49ccd4f3dc17e5ad44. 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/FR9W12339073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307439e123f0e5643669ab0c025022e9ac1adace491c2e7f2e81352233e63268. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFF2461898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c2a9be227f3bf13d973fbcfc159c4cfef4ca20b93f3ca5be0d40d6ea4c7f7a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFF2461899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251dbaeac952f3a38835301892bdc5d632f0058a39f884e221a0e047ca966ff8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFF2461900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd26efb381a5d68af9ad1da26ad2b2d1c8acc520b9d23e86bef080ddd8ae6b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZWFF2461901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb917b205d58d0b8706a16dab7475f7cd421c00b7d3d5a73dd0a73630390087a2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:53:48Z), 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/QZWFF2461902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9231c6fa2b0b2d6607e5ec936f0d3a63230624327e43378f39ad489b49a0bdcc. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:50Z), 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/QZWFF2461903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa69b2871cade5115fa0fcf428a33a9d1be7aeebabb2b924bb05209ae1df4b2e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWS2558310.