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 0xe61bfb816cef753b8ac2d375de3b80e8087ea027e2eb8dc7d8269ffeb03c62af. 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/496b0831-3d7c-4866-b2ec-e64213d848b1.json and https://artists.proofprofile.net/proofs/artist/496b0831-3d7c-4866-b2ec-e64213d848b1.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 0x7aba65b191f33421bc9baeb8e3354d36bedce77b6b4fc3fea4d834172b25f2eb. 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/QZNWV2070241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1379579604ebd2efc8f6e30cb91c18b6b81cc41f1c775798c687238a83b1dd67. 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/QZHNA2192782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495e0e5cec6c64036517f4564037f9bbd1c9621af751cd059b9090c368df2a7. 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/QZHN82244860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4310e8f9f9314725f94db8f98d1d0a754b55a36355a5aa23532319eab48a1. 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/QZHN82244861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed223cc5781aab1eabdaa1ebab4691d19a786f97d5be3e9f42783042d62bbc01. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:54Z), 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/QZHN82244862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e28af469175ab669a5031b05522824a7e4fcf125890e9f7f422d0427f26ba50. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN82244864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31743554a4f7d785b8c5afe412c28b8ecd9c8dedb3c7353d1c17caa0033c6de8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:56:29Z), 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/QZHN82244865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c5595eed35faf41252f71c653997913381256e84e109eb9c79b9bf9561ab20. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWY2368782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2ed8283dbbb4f4fc3546121989731d7f5a2fd55df8bf174e71c39fb2a024f5. 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/QZTAT2303666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcd665cb655fe7edd84d66b3312288ed5094380a1f5d6b7092d81da4fbc6f28. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:13Z), 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/QZTB92343783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe063f18a19ca23f754271728a21d46471e81321cb2c6fff7083c1af6b82047. 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/PL2DY2400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8553cc297f592989e58b86e45b6a0e72390a5385b456f3098b634ef8e16eeafd. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/PL2DY2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea832513e11fbf6bd7ab664012379a059ae78768cf11392e90841f91ed4109. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL2DY2400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3531a834767654495ce9c2dd658d4a182b0d6e02fd7019569870031f6d273a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/PL2DY2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf934ad632272348cb683c4b0cb94ba60624be099e02d2e3d27a64dd249eaa2cd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL2DY2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d2b0e2cc851cd47d8113710a43f24512d0db9862b2b575ce5d3e69ea99470. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL2DY2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f1fe312ba8f0d47a77c275298c0c705e1c8f8bd6a99ae63d7df371a814149d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:04:28Z), 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/PL5D32500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8e972b093beb6df90472ec260182884ce2f8a6444f5a1b05a76c6ff07aa4e0. 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/PL5D32500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a7dbd801648c74bca08d7934e4bf7e445d18063b118f11fc6983cfc50eb204. 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/PL5D32500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92861a8ab10dba49f7f1cb22e0f3e783355c649d0eda422863d65b8ca121e8ce. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PL5D32500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0e08fd809c000913daa72fee7fd613dec368b09454796713365ce3bfd671ad. 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/PL5D32500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5b02fa7b077d746be5159792218099ad5e6b045085c6fbdb32e6521d09af32. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PL5D32500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb07683ef2eb905963547911285c1c762a81c2deb91eaf99fa443747bf0b777. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/PL5D32500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c787b853fb864c597fb7e1dd45a3c8266f4830f47dd936a586b5322488c678. 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/PL5D32500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b726b0d81760c1667ecde11a0b031f0d769cabab68dd12ff657f51e8e5add8. 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/PL5D32500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c538eb3c7d6ae4dbe87022a59a6dd76dd625e797ee6365b0838a5e1ce076f42. 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/PL5D32500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3289a602abcc5d4487db0f5a226dd0f17b4d988aac73eba92d4e1c4962f6c4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PL5D32500047.