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 0xeb3576b656564536ff6885825df362eef1cdcac9a6e8bfd279454f2e611d7fdb. 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/4ea480fb-05c0-48a4-83b4-c4f199facfc5.json and https://artists.proofprofile.net/proofs/artist/4ea480fb-05c0-48a4-83b4-c4f199facfc5.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 0x1923f84bed670ff767e342f940af311addd3457ebe7b82f2c50802c51be2544a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:32Z), 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/DEPI82433193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29ebfe11173a5a5f7fa79b33d5c48d8c055369a305817f0bc9cd8cb80cdceb8. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DEPI82433433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd345127a4786ec78e52479082e979728c1fac08cfd0173f167a90ed5aebd3962. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/DEPI82433721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d690918aa76f14ebe68fc4054cf02d0932f98e71902f5374d7e47f550c39d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:57Z), 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/DEPI82434007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac149a71df7e18b5a6ed0db28f24b06afcba291760bbd3ab411f3b106242bb4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEPI82434270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63692f5b38fa2ac2c49a1ad2218b46b234d1b92c6c6ea1bb0c4c8ca01517ff0a. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/DEPI82437025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93945d59b047e43f704f8b29ebb36dca376ead1a3e921560a6d8713c7bc725e9. 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/DEPI82437040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d4dc5609fd730bfc3e66b8e79cb1ef48b2447302b30f8bb3259b3a9f5b23ba. 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/DEPI82437435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9207c4add86e524c5a35eb93fb7cb0ee7bbd6ef0bc495035cfd2666b7182e130. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPI82437437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf732128fd6822b79c3d56b152666e54417d20f238007e25877b877b0c6f2faf8. 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/DEPI82437432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6380540619537d33e80753dd48d901e3ab6bbafcc895b3869b5f0c3212a521. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:42:39Z), 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/DEPI82437436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b147172397f1821e0613fab022ea462591fb4a9da22aa88632cfbdfdb4b993. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DEPI82437526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb05edff7eab7664c838a455220e44a08586ed7dadcb21d6818845bf35664b5. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/DEPI82437527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491a08f6ea6319ec808e165f1326fe18bccd0a81393fa5474b71a79100708630. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:28:17Z), 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/DEPI82437534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79129b64e6939472e9d7175fd29d8039d339a3acc06539654e1073d5b407ec28. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/DEPI82437528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8db976495c784111670e669120b0b8dc719af35f39c35c0c5a667d1836038f. 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/DEPI82437535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f4db07dfc0185718b766060a63f014df0e10396ab7ad5aab3f1a08e6aa95e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:44:02Z), 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/DEPI82437529.