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 0xb5a28d37382da09c576c3fc19de3c4d53823eae7f244a5ee482a6d6332efbc0e. 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/614dd284-b2bd-4e1f-9cba-3b3f245568c1.json and https://artists.proofprofile.net/proofs/artist/614dd284-b2bd-4e1f-9cba-3b3f245568c1.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 0xe2fa31e584d5ed81a2facc3b090e81b0c3971e1f450f72770705f0daf8f553d4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/EGA1K1914240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d8063d4cb161da24fb9613f853006d996d500d35ad9cbc9229cc8453d8475f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/EGA1K2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb1eb3e7179e06645ad07577c5ced71a7b46ff75a1850fd6c06369ed83edcd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/EGA1K2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1615669910f69334ff3d6bbd259884624f2b14c39782334ab43d8c028bc981f3. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/EGA1K2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79f9b1c7de17ab70715f89cd5f99cda8df59a827887b462da30a2996b3f7b5c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/EGA1K2300741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283d9ac5fe466a40cb0b7cab2dd859a557dbfbf95991ac2d56668019beb976be. 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/EGA1K2301650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924a972a734046906e10b956d6ecf39932ceee11a43a30c7989e552bd6b12b56. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/EGA1K2301966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963bae57136a38603c9d861e3ed0ad503735de2be13691a73ff39a944c159a2f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/EGA1K2302301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705384765b4b9f0f2d292cb38786afa8738b4ccc2f6fc64c446467b87ad1189f. 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/EGA1K2303001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f52dc2d4aff45a05a0d58f19863cbf33acd1fdd0ce656652bc3467bce250083. 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/EGA252400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4402fd7eaae1b59a4b9157f5f4ba4be7a837ad80fd6d6ff498b20db7b824fdcd. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/EGA252400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88447b1fa5590ad5d30c0eb8e67bacd2bd02019e82992e02a0cb2ce061eee0ed. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:04Z), 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/EGA252401246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1004f06fe95b040509d816c075700d34405ee2a83413f2fb507a792e55e041. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/EGA252402567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeda70f9dcd246230d422dbda9a518b50dc5f3483e9f77458b5f20d21bf41f9c. 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/EGA252514990.