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 0x38b4a1694a0971ce0217aa25dfb777a4dd452fff03d93978ae8a7c71e5240da9. 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/70efdd45-3a6f-4451-ba39-e2f3034aa973.json and https://artists.proofprofile.net/proofs/artist/70efdd45-3a6f-4451-ba39-e2f3034aa973.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 0xe98a8079406ef4f5467e0d7c0d525c95a20b474967b06cd00e2b2d75d899b52b. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/TR2081501619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892c2853987ed5ce5c66bb8ea6928ddca7554b277a3242c2bf6cde8548443169. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TR2081501620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cf4263e7f76e879c516e8c505e16424b70f295ba6883a5404f0eaf282cfe05. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/TR2081501621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd57e32f534ed58d575997842d61110d9f532da7e63fdb6e5fbe81280a2114fc. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/TR2081501623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e51b48f422ce4498478eccb546fa1dbebb3afcfa41b4187a542e7ca40824ed. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TR2081501624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc764e8343b7fcf2441a55569f3a93fb09c0f4815b7e840029b53626cf2556. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:40:45Z), 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/TR2081800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16a04d230a7165cad4733e37359bcf4d82de1fd20a47b4c3908d264260e0058. 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/TCADU1887638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c834c1113be8f8fc00f97302f377f8c5a05309c076bed11d37e620e419bb34. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX872015694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa808ef225903a1d529f6463e309b2f34dfb1188e110a91d0823981396097f83. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRX762102803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04d9ff99ef215bb1cdfb59510093848d802507174afab5fe201868bf1efc458. 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/TR2082105023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbe88948138ae8ff8739d7d5d2796821dc325eae4c85857f30cd8841e8237cd. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:06Z), 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/TR2082105026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ee4f47f4ab525eb10451335675d5b45dc7ee7ccc457b92d2d287303f2c7b4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR2082105027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c3b1978e7668980bf4717648de14e3f294f366348e65350e2854781df43de. 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/DGA0M2414483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c728f22441e7be147094acec47d1a5553fbcacf9366dfa2a8f1666b734bb0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA0M2414485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff806fca3b7ed6fc1b92afb27a08f9b57edfd4705deec6bdfde516b700f1b1ff. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DGA0M2414486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe507f3e3da9e7bb4369ff100f0f4961e1588a391bc48f2ada311a642c35a0fc7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA0M2414487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f3ff8e106ea0cfbf5d52c480ac9fd0eb03d12f9fa71fc9c8518e81400a107. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DGA0T2425927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd585369dfd6a67c96873280c85042eb132d48028efb44196bec1f78aa8def9e7. 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/DGA0T2425935.