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 0x4721ad49a94b5f8423a6cea1455ddb21e3462edf2a433307700ddc3a03e095a8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ccc8ff8-70ce-45e1-9b19-20220d5bbe36.json and https://artists.proofprofile.net/proofs/artist/8ccc8ff8-70ce-45e1-9b19-20220d5bbe36.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 0x7bf6adf54f4383bb2417ad76794527a13d669248554c1a437c60d98e1af817a5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM24S2304716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc89b4adacf12d47a413ef7b4bcadd73ae097acec8a467ced7d9da95be30225. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QM24S2304216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e212ad1d4086519fbea3d1247d7e1ce9d11f2e1de1a9b10dd864e5baccdb03. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QM24S2304714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784142577c3a59838f6889c182fe9876572a4863302cf1d3f00a1c825d2f7d5e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM24S2304713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23765d8e445200b938c1b449b02ba82a20972b4c7c5733d85d04587ad45cb2a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM24S2304710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74c0c59324dbddcb67fc33e609515c8a97bf9e651199331bb6083337a26a1c7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2304709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68554fad2ced89cdeff3edac7632e06d07ef3b06353854d3dfb51187d8aa912. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZWDD2368507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119e3542465be65a7741ced59f307c6839a08f8ca6d6b8a2e88ff9551bd2c5fe. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:22:17Z), 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/QZTB52377897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13b4be327d13a093dc6fb1b48d8d63c6cdaa6e4e818931538ef9d54fa7ec245. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:51Z), 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/QZDA42438937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638edb3cd8ba63e1aee29440a424728adb7cc8631b183ade6e50a6c1de0fd6a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMEQ2461432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4568c6cc707ec22703f4b1b7e4b075dcf7669c2dd859ff35bc9b6c9bd9700d1c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:41:01Z), 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/QZNWY2444541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1ce6f6db8f2392f710d516c1b9367f9198cae49677dccc0450aee06b0ba53d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USLD91763421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609b0ed73ac5d829b3ba7265c1f21f68f27c265b5f8fec3d098f0f0f5d98263. 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/USLD91764875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ade82db99a1b175828ef069624ea2fdca92c337430a61dafa5db2431f7c2f3. 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/QZ5FA2450122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cfda2420d993957c4e60a73c61af565a961313ba7723bad3a959b02c83f045. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ5FA2450123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929f6cff17fca2100a91a9cf23881bcabd345a1a45de00ea0889cc4fbc9f2c92. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZ5FA2450124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96387a852014b370b9f333d86fc99a2fe26a7554199acef13768f92706edc643. 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/QZ5FA2450125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134d794f3070a5a042e76b2c08b9f8ba503d8c44cea94ff2b2e5ff4ff9882604. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5FA2450126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ceabcaba82222368b0a8ed30bde4a0adb6aedfdf74691c867d660afbf6f9f4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZ5FA2550016.