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 0x42acc69748417b833735b12a0840978c331fb005e96e1c17214eb7529f50d4b4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dadc253-9bf8-40d8-b3e3-4d1284bcab1b.json and https://artists.proofprofile.net/proofs/artist/4dadc253-9bf8-40d8-b3e3-4d1284bcab1b.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 0xd37f23d4687c833c8a16cb09e8cb596c9393f600cdc944a142006ac9ef14c808. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV61412821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ae7ac66220b4411f08a59ba5b27278bd2abb10e0c7adaa2f4e59b4b329bdce. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLV61412824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c03c83dec56fecf9687a4073ec62a09075264772917da62fc0fbebac8420c5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV61412827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f23564a5df49c6bc631774294c4a5d84dc417b72b4349bad08dca44d54ed404. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLV61412829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc758e99bcc87971ec195c6972896e2b4e9bc17afca1ecd42bbfc7404beb628f9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLV61412830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67ad7b106f5aaca1858e5df5411ea496544fa630ac0a74be3a7df8fde95d03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV61412831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb662d296798c303c304b561dfa7ea61242a7d11c9380b690762944061322169f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLV61412832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7483c132ec2f22e190d8b622deadb47c0d627d6cde901b2ce728cf2ec625d88. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLV61412833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d06ca402a14ee74ebe25d5ab0ae755d9e4a74b5b32eeb44bb14852e1f5d444. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBLV61412822.
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 0x19c6e38a5ae45557ff15d6a87512c631d7c5d937f6be1562f03b87cdb1fc4e0f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBLV61412823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59ba201d9210ed76e526b7d1c43f791cb3ea2afaa4a2752c346f7bef2b67033. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLV61412825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9759a8f702fb9b13596031108ae40ba450d912276b1df7137831ca9570133d90. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBLV61412826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aac430b4393f3e95ed9eef6dcd8b3d89741cd670ff9702c77e336b1c546d34. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBLV61412828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b157bd4009654f8677dd0cb4ebf9732d29f47a1a233e905c0464024c29bd23. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBLV61412834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c61876f033a8f3afc2b9d5371f4a84e22e2ed33cb2414209caaf3acabd156a0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USDY42330744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af14001c6b741274e0809cdc2a2770ba95eb454dbe4060cbc5860fe0e11249. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAVWU2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7ea6f43895cd2a813a2f3711790594bc67167edff1c687e55acdd7830968ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAVWU2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d968c2627714c828b49c41368a78133cc4b8065ac29a93cc68b5eb445d476b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ZAVWU2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41456dd0d5e1cd7a7489ac50dbeab7b17178737a03a6c7f5360b7cefbc001390. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ZAVWU2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0464fa38af151879af3bacb866e9a23fad8720b6bcf8810c1b93c074801c1f1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ZAVWU2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8172e39519aed952163315e3dbe3d4a10ee579c8f26b6cc58abe1f8b1bad29. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ZAVWU2100035.