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 0x291e43cdfe34292a5b32fd459b0b12f928f3e788646fdcce078b321c056b709e. 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/86024d27-8665-4c7a-b280-c44dc90cd7da.json and https://artists.proofprofile.net/proofs/artist/86024d27-8665-4c7a-b280-c44dc90cd7da.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 0x9ce35a5c1ebdb41f0d72377f34575c5c12055bdfc9e338f712e437d7c74cd1c7. 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/GBUHG1306302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d8b749885b07f522cc8344412e88270d7abb5f2cc7eaa6c689ff69dfa1bfa0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBUHG1306304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892161b82f8b04b8e1a484c8af298b4e4aa005c8df621ebc48b81bfe0c73754f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UK6GD1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fc67f841b40573703bb88295178030703e7c2c3670773359b767f9c2bd6ac8. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DEH741819650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9129c8fc0883003e5295a7899c27b3ea338ad7c72091700f2a44b7732bce9e3a. 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/GBK6Y1945501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957680931b072ecb1d5b27bc2a14912d5c38701a2b6abff1a329a96d12ed55c5. 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/GBK6Y2015101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb318b2850f70d98a7583add607f7fe6896b825c31707efb9eb9b0829f037fb58. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBKQU2053247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e8f2e05392e7976903a29fb9901052130f427388f20f5319669b66724a5d8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLV62012599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8291b3b07afa53c60ec315de828b9129e2ab26edc3b60f21ad765d19a621a89. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKACT2032301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13036735f585783813557f262dbb821cd3aed5ed64a93c059303bc1d5bb72501. 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/UKACT2032302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad418f3415a502dd9945f9ea16d829cdcd87691f168b762680b04cc52d46a3d. 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/GBKQU2103625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df898cd7711c6af989990625a2de1dcc5a2beeabf5f1d4fca901e634e35d26. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBK6Y2117502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee9717ae2c529528f9fb377c9e4d74dff023b6a6607b51592a749e7a62bbaf5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBLV62108967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee25f09c72cc5e9e9951455ae8b0297e91eadfcfce95a2ba9af52f1d2a2564fd. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBLV62108969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dd6ab7d11ac0cb32465ae29b8d7f3f31079f14afc9aa7514d7290eefc44268. 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/GBKQU2297137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdf71e1e94fc171d68aaf71745b9d529e8f9b03122928a8c9a517a562b9a634. 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/DEG932102024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0308455925bade46e9776d9f500e1e3ea5441f6a47ca89a2541c3dba9c8cd1d6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBLV62136074.
When The Cheese Is Gone - East End Dubs Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514fc44b83419ff3334cfccc4b7ff52aef8feea0781cfe2a11f28ec30fb203e. 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/GBLV62400716.