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 0xdef95e58562bf48d1cd10adb58d8967ee673ff1a683895d521a8649eda85e122. 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/c970122b-e76f-4d2a-9a8b-b62fd85ecccf.json and https://artists.proofprofile.net/proofs/artist/c970122b-e76f-4d2a-9a8b-b62fd85ecccf.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 0x7b76cc5a943ddae1288c904362a95ac8a9a0122fef48256ce03dc5ab5580fc03. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:44Z), 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/GBM5H1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af236d153b49968d755ef57d4001517156331dc2abf8cea26ec9cf1ea8c1b7f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBM5H1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a94dc10510a956329acee759fc7ff01d3974ac3ea40d40906cc7fe05d3e338. 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/GBM5H1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dfaa796cba51c1800f5d127d67757753f9e4416ba5afdb3408a2f1a8901092. 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/GBM5H2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c087904fe92af208c782eed5c872d9898c7dfb56886b597e58136e4eab12de. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBM5H2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15fcef4edb30058d9f0ed756c530f5ccd9b5acd6481fca17140ffbd8db07dc0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBM5H2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d98b6c1e359a6ae09a482c645abc1452b14730dda8e83446d464dd0739d459. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBM5H2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7047df607d229db52cd1497e822ae2157d6f10fb0727a5010679c5ce1c41b1. 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/GBM5H2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1682b999d1131fa0418086b59785b466f698343b50e239166c384b932724bf2f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:26Z), 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/GBM5H2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc341ffc5d361fcca0c72c74512efc3d00a7871d9b75a82dbc76a1ceb86146630. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:56Z), 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/GBM5H2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39909fa443e4f96e5375ad13b872ab93ab4b778db8af9e766f6b35e6f6546823. 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/GBM5H2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7b5a1e05d0ca4072862adb009063605a470a0742d267f7d6aa93bc27466de6. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:31:39Z), 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/GBM5H2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3b59038c091725bbfc296ac47521fb8f077b763d2bc1f38221ec4e27edb4b5. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GBM5H2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf7ede0a4c7175ecf4a7580a3180a935bdb99427a8ed5403b411001f6c43798. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBM5H2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1cc1c31a70b55d9fc6e01a2eb37f950c1eb6596b62a15581a55fde2cd72839. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:35:25Z), 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/GBM5H2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d8b019b9a168c3f13da518b79f8c461a6f23abf3818f79eca5d0d3c4abfd7. 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/GBM5H2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d2e2f31ec072ec111902a0d5aac6ccbd8d0e27fae3bdd7a5d3a843ad06bb5d. 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/GBM5H2400052.