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 0x86a9829a1ebd2d517e841fc6954469f5203c73c9d08e81ceb970a7d5783370b0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e02ba3d-7124-4618-9c5c-a0fead268daf.json and https://artists.proofprofile.net/proofs/artist/7e02ba3d-7124-4618-9c5c-a0fead268daf.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 0x6be3ab9c7482dd243c62c5d5d0726bdb0cef0ee6b1904bad140aa889a8536d5d. 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/FITTS1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbac12cd341de2028b4b40e6f435ccf326e70bf3780ac57f4de10393149faab2. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/FITTS1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9a3ce49198695ef22fe54132aeae1624a02378007f9656abf4ce36268cb601. 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/FITTS1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d385cc058578f6c2609e986e372191e95011cb221f0ce0871bd2f378b2095a1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FITTS1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0137bb85c5372466a28d5b9eae4ee7d07b5ffaa46e931a69c2d03640976d2efd. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FITTS1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3583afa41dbaa678f8c6d9e7bb835034de501fa3250240fe0acd8cc84f9104ea. 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/FITTS1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716baa010d324f51c0dfaeb1cf867b4a7a1ea36823c26e85de624e7a90b578ba. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FITTS1800131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd979b74c8342ff5cc076cdd13182b1fa5780adb3e5c92bde50d5111230a414b7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:54Z), 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/FITTS1800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0a75b4d3d4243ea0a884b1aa0aac74461e08aa9c0c71a1ae517e4221b0e705. 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/FITTS1800134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf19cc5e370498b086d5c15363fa61cc493ee8742ffcae231dab6174d532948. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:30:55Z), 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/FITTS1800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4963f21de278905d2fcc57e7f96100f5c4ad6b71fdb14a8d467efbb7072600ed. 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/FITTS1800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7312f850e56b25c8db15feecf0b4f376fb9048d63114f60a8f2dbbb0a5393d. 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/FITTS1800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2188cb9ad1dfa972e28bf784da393c385e5dbf418b60e85e38c8b0d8ef1a7e3b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FITTS1800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d606f5eb4ada370cbc15a1610ae0cbbd3031c4a73dbe60a933f5acdc86a7617. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FIBR12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac755cb6f1ce40f49ddb5215d27a3663a337e068c402a0a3e3a9dbac22d1a628. 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/FIBR12100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b53de5c3d0e509745c1d331d9338313daf56e2902ba11eddf8530cfff9f1ad3. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/FIBR12100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f08e00f668c9527cd63385799e2091df78cfecf25372e138f20c29afbd5091. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FIBR12100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd016040847a4ec6c4c9497bb0576754e17c895120cc56a69936a23342bcbb265. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FIBR12100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dcf0dabdfd7cb8312e181c68bba40d4c2bc728733cbce326d02e2284664cba. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:27:36Z), 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/FIBR12100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fe6ee9fcba312ab91a77d3efe749e210619c8e258a600cb67aae302ddb9bf0. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:44Z), 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/FIBR12100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbcf8628bf94360324671ede84b153b2c6c94e9b61f78f5bdc82faac35544be. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FI5ST2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf70d9519737e710475b0ab669f993a758f9feaaa5a530f78044540dbaacfd8c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:34Z), 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/FI5ST2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa908513c7ff5777379155c80aa490ea4d1eff9f48887fbdff12d231fafa25d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FI5ST2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269f4232ea385af77fdc0fe3bec9133350851bc29e377083561bfbed79bc0b29. 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/FI5ST2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31f0943d9ffc1db9c30b65f44a4d4c072365d245d9f87e30092a30aafadecc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FI5ST2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42afdd08a9c9481ebf4a7d0c8d840bdf75cdc7caf55eb25e277f3ac5e779b6c7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:13Z), 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/FI5ST2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d0357ae51dbe8de90791f9769140352bb12d5f71c4d75ecabb3ce325a182cd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/FI5ST2400007.