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 0x0f3afa947af7fdea8725dd4e6ca570d10559b83b327abc1f0118f871967f3ed4. 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/446b6eca-883c-420c-8776-3c5065a3be2a.json and https://artists.proofprofile.net/proofs/artist/446b6eca-883c-420c-8776-3c5065a3be2a.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 0x9bf51b45eea7e195de4b513f355e1be7789bd2ccb35027698ad1f3085d31eba2. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/FIVLM1600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fbd3ada5d35ab989ece6c108e8d11a271d89940d98483251b911d9815547f8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FIVLM1600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b92d888b0488d5f967b888c65fe39a7db2202ad16fa2ecfcbe704cc5391e39. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FIVLM1600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2e16a056df79e01b068bdac7fcbf2a707441172d2b1f9b619c5eb3288858df. 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/FIVLM1600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19aa6dbd3385a71ded150cc9bf60283e51ad8f05cd7507be62a85030ba775f4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:36:49Z), 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/FIVLM1600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf98f96cd1e70248b17028136f612ad9d83878f3107387a1c5627d322b74f706. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/FIVLM1600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e91f923d33bbc493280fafbc8d1f2e696eb2e93e5137933d9f1a0e57e046da. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:21Z), 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/FIVLM1800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b0b79928a0e97ae74e22fe84c0ebb9bb4c54048d50cd80f055e5279dec4483. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:11Z), 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/FIVLM1800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517f2067d326dc1b544d327b306e34602f7e1ec0b0ef916659fcf5308824be96. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:48:35Z), 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/FIVLM1800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cedaca2fb74a737ae0d8e5dc0edbb036afdd13ae5d0612a04f001144d3b3fcd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FIVLM1800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3aff9b311b9cd389fbf6d7b01066b98a2113b17f9c81396e443ffde1bc6563. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FIVLM1800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54586191d773cb76b239d98dc79e0ca940d91a7e1f6d754e5efeea1360f679e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIVLM1800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cfe0787deb949e02cedf1f9db6106415bfe178be7dd45bc4d270da04f5df62. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:37Z), 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/FIVLM1800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae35ccba6d897cff6286bf22ea8cf71013d2ed38a7b5e24d6cce603c313441. 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/FIVLM1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df0052ce63cc5b4387371b3f716e872fba4991f4e83636b40482f84c4ea095b. 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/FIVLM1800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a0fa1e0525cf70ac4e09ecd56f6348163572f8e9caf34deb8c897ba24c4436. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:17Z), 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/FIVLM1800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d1d1e64f3458e4f6d8f088e7b31f69f16b3b3176d9299bbf9542ea332817a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FIVLM1800105.