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 0x8500358192363707548be31115a291f5e575882587c87f13ec692cc51ab9a261. 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/89414e8e-67a3-4070-97b0-5ca0b098a1e2.json and https://artists.proofprofile.net/proofs/artist/89414e8e-67a3-4070-97b0-5ca0b098a1e2.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 0x3e06c2ab057165e895ac8efcdd7a9244a39edad5115af76b8e00ff855a6518e4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/INM431600673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9902e24a04fa0a2170ccfafdf30c693462a3e045d1cc6b188b62454bbed8de4f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/INS181701115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4505fd70ee1d442c019f344bf2bc9cfdb37cbee716c3b782cccc62435a1c97. 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/INS181802567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b079f4fa10188c0e813cc720323034900fe112bddc1f0baf005bf059e82f7f. 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/INS182006672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b4398c0dd44cec21ece0ceff417a630c91c513fc9e7cdac8a6a403a5159c98. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/INS182100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4a724d7857211be092033dc8c2be0f6ef27a9402cfa61b45e9ad89832c6736. 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/INB782000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f3321eca00a6dc1b7687e4fb476cd52a290925159c70fe0b11100d76ee5ba5. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/INS182201285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ea90ce8bc7b273d5a80935d903742656948e7f2ac37b071aeba391c0d8b0b1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FRX452294339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1e3fb4b2e8f283756a2a7eb4e569bbe732c2fdaecb2db21154a88a5eb3f1dd. 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/INB782000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3587f54d61998782f105acbfc6b541fa3824396499b994b91ee47e4b516bdb0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092216899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc799cb45b42d6f765868a582ba1bfe6233addfae45cd13a662c75503db5ddf0e. 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/INB782000316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a7bb4fdfde34e0f5971c8a89a97438591efe2e36c658e714939726f983aace. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GX3Q92346676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65059ca58390c545668654f3a239bfa9aa40147add2f49052225f857065ba3d8. 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/INB782000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe712f89914b949dac67598536ad3d6e95b2986a302fa30c3b8019e072aa46838. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DGA062370241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a58c40a41d3037ff834f64f155744ce6a1a82c960681dcc6df09f46d7c282ce. 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/INS182302599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae94204ac4240c60c921641deabd8661c60fea9541017dc8126f3bc53691950. 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/INS182303007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fca7d8374f88398cbe207a96aa0985bba5358657f326d333de58134dcf2fa1. 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/INS182303707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654793f51f3be34327189b75e070e49ba55ec6a3e6696fa0b0057b0a5ac501ec. 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/DGA072469430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5713dd6d9f8c03916ea0113103cd1f089d53df7653a4b87a723353b79fb038. 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/INB782000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee344515418102c0ef09a6ee9be50269f08ba6bdd2266da03d8dbc27920c7f76. 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/DGA092479439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60596054d0903922b657af6548003aea8c7dd52799226897b9b8be777aff2863. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/INS182401744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea72d0c1c82430250aed8bac6c0d57d8f6560851a8f94bf11c547fc76c26ad9. 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/DGA0L2463001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7017604e772db4d8f2f861cfe872a6aa122c989ae877b168ab22b01375c8529. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INH682400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b8a4bdf5f3f97114cf083dcfaa9d9ac3e8412099a510a217580fe30bb0fb1e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/INUM72500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef162ed7b6b12393a5c9985a4cdfd62f99a8d22dcb99e6928a86ce48fea8b66. 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/INT1S2500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd3366b13f064f284f78a9163c0e71dd717129826c8d92be5f0b30edbaee72a. 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/INUM72500683.