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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e29df8c825bd075211678d6e8b47aa6ee26a509609d6abe31fed47880b8944a. 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/b8eccd11-6da6-46c8-bfa5-cd16ccb6b6d4.json and https://artists.proofprofile.net/proofs/artist/b8eccd11-6da6-46c8-bfa5-cd16ccb6b6d4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ee60ece11bff631d35c0d48655093f82b71e52313ebf9c7dbcc48d804bbb4e. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZHNC2267576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11594576cafef3bad0180519c62f7f3aff4a1a36d2aa2d47a0b12fb36a6683. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6F2273348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4497daafc9f097567f6e2c82aa43ea54648aa2d0c0f0af801f8bb96bca2b9be6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMER2233453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4460be7e3d2994c3e091ef98161ec653596eaac8d28fa291ea6cefd6fa7745. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZNWX2292208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf18df0b72631b47543b8f9d0cfcc06dde246098c843bb6f7565b53cd015a1b0. 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/QZTAS2283610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4705813da25b7d4ae89fbb5867d05080f0314ba4097a5457077d8e6f540fbde0. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZFZ42335662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35170b00c0b769a6712d874b69df7e25e0cc7a99670ca5df0ffa7fbc65381a95. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES72337880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a4992a7f69f81b74f94174e2f05e29d9193a3b082950c29d9f9fe0a8c0e0e5. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZHN62350173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6e12c48bfbbee2c5f0fc053caade46b169b305788ec69654d47e268b5eef77. 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/QZHN72304881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1a4ba6ce5f09234056ea2aa7d93f825b1b3aadfd16321c8c84f04f466c1757. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZK6H2310677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492c3794efc2441b113676f534327468b8bafd2653c5446b30272bfb6d41deff. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZK6F2313185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f4e15af3457213159a72ce55dae80e71d5257844c96ed3532a27a9a610e9e3. 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/QZK6F2313186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f07f83d8db772d9dd74f63dcd9add73b325b40a736c91c798508a078f6dd27. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZRP52366398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7503815d3889268b20485621b2e806d2a6672adb98d14b0f3a39bb53bedfd2a. 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/QZTB82457503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d10d94e71f8e53e21879f031ff69edf648de36fd3954d2a6351e4626f102db2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZWFQ2460522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf6541d21ab49910b78b4ea62cc5d19be8612a0827c69205d59d395ec11b1ff. 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/QZWFR2417972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32af551c0fb924cdaaab57e7e5a97b4120462fab1d18148db4d892048b9abd15. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZES52518769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455fb6d3ad04221a8b56f62bfd85a4d22b6b827b8e67ffd901d08c7134281825. 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/QZES52518770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5f4205e5c59a4fd709158fdb339745edf173abde8c4f8d0041bcd1fad51a9. 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/QZHN62570787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801ef9c76c0ef1e3caa209ae296060140e844a55196d2689069cb77c6a3fe7d4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6J2579834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa8b527c6d061abaaf5b420f953b59808bfab932cc579198f0d55c65ca1f71c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMER2515391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161f3fd4292d31b6f35d36dcd0d5b97c51f9031b350fcbb6bdcad50a926a4127. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMER2515392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b7f046ac1f41069f75cf525eedea315c5d9f5e3d86bc1952b63c9b810ba026. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZMER2515393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc7440fe748309d4230eb8f98b0c66d8625192f903a661ed82f4bd49b22568e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMER2515395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd7c2ee5367238692a9fb8e958e4edbf090fd74d8f1daa4b5a29684cadafcd. 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/QZMER2515396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54ff7cf97b0b30013458d4580b123de693c0fa76b3d57cad03a2891305b7c4f. 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/QZMER2515397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d7f32d1c438951f966b68fab333755663334e4ff9d271e1e20630225d1de5c. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZMER2515398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dc98adea280c99737f522e1ba6c83e388839073d0a765df21020ac258d97c2. 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/QZMER2515400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa741b87f590a00082441480dda0d6d67a906e5c7fd8903ef5aa4a9b226c077c3. 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/QZMER2515401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c71ff522a96d4ce95db1953085e650dec17e751dc474f766fae2ed79d4ecff. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB52526826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89eeb40bfd7fbedd107d9e9b03a48eaa4ee2326e458a8d5f9efc7e8b8a0362. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT4K52583789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7c4ed1408ea85266f0d19b4c5aa5f1b0d4c8aaee218e114467bf7bb32343ff. 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/QT3F92582431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea59cbed0052d1aac755a7b99c950dc748eff12fc2d46bfe8a022ad1708907b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDA62593771.