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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7ee95c1ddb20a75009a9eea6912d5776c2d6db5b939640ce204c9b30e68069. 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/7164c87d-59c4-47b3-9e60-63a67285e170.json and https://artists.proofprofile.net/proofs/artist/7164c87d-59c4-47b3-9e60-63a67285e170.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8564b6b42d77695c86281792ff2106438b37e6851d08518898486ad741eb55e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXKG22302013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b86bfffc2fc87508d07cf42e39543758e5302e370c65ddad41e3c4c95f0c07e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22400990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a4dc7b91b5002bc542ef6bcb8aa304f86726351200493eac7383f18aa88cb6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa58e294bdc134890b9ae7672e2709236a472cfd91fc2fb354fa8bec7a15d2b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXKG22400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1063e3318a5a714c55a7172d2ed56cdca0adc5780012026e08af39510d8e93. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKDFK2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6b01553b1b743c4280ceee8d6d54a8cf29f09b308dde0d0ca3295bc683c31b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXKG22400521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349b349ce7964a50c253348bad975605aacc55a876a6a252a3489e9df97f816c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKG22302668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f29bb7b24721f3236ff5862a3e2574182b0f9d059a46f19c910c18b41986efc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22302344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915f83d7a0996c90bc52bc467b55ccab70e79d8683bf766cdfd0ffb37eb45a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22301926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37715e63bbd007a09c9b919aa6edce7f20a3cb5b3dcfa6ef96aa86741d4d4bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22301835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd864ad2ce434a735f8f5562469e5743c6eb2c93029188d5bbad4f961c1b3a3. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BXKG22301834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e41fabdd1324846bf8e2120b262224588e9554d248c5f70cb4c138e5e4397e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXKG22301544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafdf302002de465cd9931e30c941a66a51903eff0873569264ed7940f94e5d6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKG22301548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72662fb3ae11e1cd4b826acfedbccaeaa73596c43f75f827d3ab7174bd0324ce. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXKG22301659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeba3079476172428ef7747a1b597a98c264f7e6b2bc43e9dd83eef48ff092f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22301545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322c53c704bdf75efafd65d493090c729cdc87a574459f8bb48d9e3486c34cc4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BXKG22301547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bca584c39a78a8c3e2a36f00c2416495b928f4915271010a7912abfc37372bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc7f3e592a7b174449d7aa404713b4a37d0c9ada1cbd1a6890f7a3481751cbe. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BXKG22301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d509e01f1cc1050ad126f1dfc75b7e08e6232e7eeb7a217b6dc1da2216e7252. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BXKG22301543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a25ce82af98b902d727ba2c7904d8e1201d4cec7c765ba931f2d184bf637b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22301542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409c2b3283b6db1bdd9d779b9e8cb293ff2b8524e6b98920aaf975f56e10bfbe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22301512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb659475ba9ff0e4da824551ace1ada63a5feab6d5c24fb760015fc0096e852b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKG22301343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9276a77536b760c3dc49c9bbabdca088e0c9414659cb9930462c6140781edf90. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZNJW2336998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daa065d54062661e39a0dddac66a43ecda96cc29c714e6c3ef1d4fcb298cd76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22301096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ecf4c0bb1bcbd3ad019922d31d1142af5f8d0483c74414dfa0f364eab7acb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22300944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6673a135bd42bd54da080d946c05fd1c290a8c5274a3dc30846648de70654a45. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX08N2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51dccc1625d0e533da6caa38971bf01154e2f92210c159ce84c79e80d8719c8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BXKG22300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db4c29c6cd3ad0041f34da4d981f499d6d963afd0fb5984aba1d24ca4590c1c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2322743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc32e723255ea267ce3735d3ed3d673cb652c0814b7f0eee2fa8db545b43e23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKG22300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc496e7c74360015103961691d87dc1026c15724bb1a63da030af98367ff40570. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22300291.