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 0x87c32e5b902639bef0670df2b7bd351c44938a1cd26fe5f005df87f0e9c7932d. 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/be569b3f-2555-4bac-a339-82d0e991bfae.json and https://artists.proofprofile.net/proofs/artist/be569b3f-2555-4bac-a339-82d0e991bfae.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 0x375b88e8cb89fb5fac2810b7cf7b1b043138c12b7aa2b4bc6d9f8573ff800105. 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/QM7282095188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0ef674fe0b0571cd51c558fcca6159b5935950849bee54625b77670da738d0. 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/QM7282095195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629e5b351dc79263ab9cb780064b17d7099e8e0016f86cdc73d8dde53f4c4f2. 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/QM7282095199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49daa81e99f3f742bea6deed2ba9ec1dbf568634382b7e0f22f1ea029913ed41. 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/QM7282095202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd020bb68b17b6322cfd2459e9d3a5325d81c5cf9e1398d1966a3743fdb87a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USZBG1114782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e93ffd1210b4ba20b40321fb0fb017fea3c1c230e62a1952411a71d85936ef. 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/USZBG1114783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5d056298691059e5989b09284a0d749cf0399f064e8f7be82e6b522e405ab8. 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/USZBG1114784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde51c32ddb61355893184fed1d75f58dc3a3d5db30e4b90b0058963a0f637c15. 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/USZBG1114787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55faee0aa60ec7a07e2e2ab81d0b253054db2fbe4a307051ce5dd5132b89523a. 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/USZBG1114790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea19388821c44775910b4377f4f19652694f843ac422835f05265bd7b138dc11. 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/USZBG1202601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbcebbeda106784e076d8286fa6c73065a0a59263d2341de8a39394461704a2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM4TW1671759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f06f436d8e562cbaefe560f3884e38ab2f25064daf2f6a7c8fe7b35d6f010fd. 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/QM4TW1671738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5320de887f3f70e512fdca464005d63d08eb43a298df80bb356d4e8bcb93b21e. 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/QM4TX1608407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97b3daef66bf86ccce60859c8f37118e3fd0d0020633d174f89e40b4494dd36. 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/QM4TX1608408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b249ca38ecfbfa376e2d2b305d1bb623ae7100de818019727cb0685c9e0853. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QM4TX1608409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6fe273551076714dd3cf98d76f381ef1510873271d0562c68dba224aa5eff0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMBZ91664053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875bcec6e61e8799853390c8796a9965af32847f27d944cf213112094d016938. 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/QMBZ91664063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cfd82b8d2aaa3928e1bc0120be72d681cb7020b1ad3044051f62c00ea4b2dc. 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/QM7282093363.