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 0xd86fabe7d6f5c8481b2cc154a5022d20b2341c079b9417dc063b4e0266278c3b. 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/17d7c409-ae05-4029-81fe-de4265c44e13.json and https://artists.proofprofile.net/proofs/artist/17d7c409-ae05-4029-81fe-de4265c44e13.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 0xf014e0a1e0f9c1a1dca40405a4d9390f84721ca30d180ff2d6331855b529d0f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2401181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f6e39ed50dcc671fde8b8a37153acab1678c05f3a7a760c53cc428c8136d62. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2401183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12465869ed9e12e9023758a465645e1824189c01477866ba550e31f2cacbab03. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2401184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3ec240463976c46646a452479e9d8d7f6006ee6914140a067ab23fbb5df6ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEWA2401185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb238e88d36b2eae9c6a326bbdff988098a26f1cb130564e9d8a6816c3876f3. 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/GBLV62313732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c5b1a90e508db68e6e559e6f301c654dd459696b970d7ace70ab7f958ba770. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBEWA2304411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff8d6cd3ae9ac996b2da2714cabaaa126800ef962c7c1f3bc7bbf193c8a323. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2304413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3088fa7c6d1410ef2aec34f946fc8c291ff4e2ea5e5f83624b308d5420e1478. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2304030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9692732b6cbad052c64481476c56bfe486a7dcde5c535bf6938f7e1d30de5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLD682302294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5eab826d1ecb7cbc2b12c535ea70c93a297ca632e6f979321b5eac925b492e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLD682201089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c70fccaeb815dd83a49e9781de59283c0916d9454d916b314abe8e7ddb0a43. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBEWA2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956a582bbc6a0ae7eec1822a1878d4f532c5545c57e9e112f00d92261a20116a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe912fa919fd0b63428fdcc45c73ce960392913e95e30c4a7397f722a1841d58b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEWA2103590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10977057dfa0f0b9959c93b9140de2f8a6db7cc8966d0aa82cb385decbb5afa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEWA2103591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50f9d33d243f3130940b8932d8da8f88fbc2b5d64689d2551d50482857b9e2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBEWA2205212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a9326ff439f8fa92d2fc0b0613bd04915c1be1a1de7919d30417198d02bb5e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89946c94de784fc4ef2a1ed16b59c91be7cd47db5e1721fe0e24b1fd78e500. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:37Z), 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/GBEWA2100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df866cb385a5b77569b4c61b27f3d8bf4d24c3a12485703b122c8a3f27d242e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2402156.