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 0xfe106080189102fabaf93f4cf45f547155db9408b464438eb30b3c1dcd56bd01. 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/bbd548e4-3b49-4392-be28-08543ca27648.json and https://artists.proofprofile.net/proofs/artist/bbd548e4-3b49-4392-be28-08543ca27648.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 0x063f7166e9d642843f4ac5ddff188b117e3251cf666c6f1d76f70e41e3ca3a32. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBKQU1562076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc84aae442d0e3c31cc95fcbe589c8277838d537f90f6a2315d0621562b9d79. 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/GBLV61623905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b1553442974e9a790c0a545be966b486328080dd38ad0fe49bc96e873bf0a1. 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/USCGH1795355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0eb43895e54d0b672002de3cff1dd31d4e74e11d72295a2ab30d1dee5e0f4f. 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/QZ5FN2055705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b365e078a92d7f9a4c100a1f6a1488686de63c807221c6fad456113f0c1a6d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKQU2208848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9f26d3c1a852585ed6a9124bbabeeb73c8b8fb22fb488665977f848e058e81. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBKQU2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233627fdf87394a95e30c78c7b21c04867234d3c83994ac5e07e46c7cdc964e. 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/USLZJ2309092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad0d778b7ce2a67968fd273bdf380158ea654e0fa7a7830f65c9b89aa6cac93. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBKQU2352697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73244e6b8a9b2640915384e51cc9bb1d0ece8fc1b9fcad9e8d5460203d5c162. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GBWUL2405144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c968ad3bd1db8d80eea1bbf60b15a644dcc96e4e54ce37566373f9be8524679. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKQU2392980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fcd0140506c016e8027e3a0d175ada5fb96dbc1f5cb5228c1f7efc1ae4c348. 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/GBKQU2404964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe0da2d07f69d34e318419f407f75a05be5646f5c744c15d3bcb134829c2b27. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GBKQU2405029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e18d28f6902277c8622faac60658f1e8b22f966ad12492f9aff30b11056c80a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GBKQU2488030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2460f83bbec79f90eb21d64e2c8a252de145b5a9ec2e2cdd639b9690cfe7991f. 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/GBKQU2488032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17d9be3d5f6fab2553ee6f1001a41f27de9af17c68f10582c5ac0f81db9dfc3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES8742431206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8cc59987bf9c4cd3995b16377491abb126e6d0e0ee4558d8550bfda2670011. 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/ES8742500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd165ccc31cfc2086c81107a88de144102504a3b0a973d935a5d29d8a175bdb. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QMDA72547419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ecb6ab56ee17df59c8d85cef0563073862d9ef62cdc2ba6a2c4922103b8a96. 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/GBLV61501408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7daa78ec556d995d19940b78724c547573a644ae09b722a3b5fb04e880c1d83. 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/ES8742430205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233627fdf87394a95e30c78c7b21c04867234d3c83994ac5e07e46c7cdc964e. 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/USLZJ2309092.
Café del Mar Ibiza Chillout Mix V (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bf6caa514144946b964805bea7bfc9ac650e9d4aa69cc24534cae6b368e514. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES8742501103.
Café del Mar Ibiza Chillout Mix VI (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ddddbba299c3f05466f59414fcfa4ae65bae977c28a1b6547dbe5796e96068. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES8742502103.
Café del Mar Ibiza Chillout Mix IV (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef09f0bc3844db85c77348de435189c37c4f4e3e506ac0f152671269a972f45. 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/QZ5FN2055706.