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 0xb0f4355cce57da19166fcce22a9611c2d55f245506e248973cd6ff4833ae9f5d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77b6f87f-db38-46ff-9306-3c548ffc4d47.json and https://artists.proofprofile.net/proofs/artist/77b6f87f-db38-46ff-9306-3c548ffc4d47.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 0xb835cfba34e95b50e47b90b68e9a36f5f3bc929f8dab4a0aa1e92f756ad70681. 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/QZGWW2106166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3995f08d42eb26077237e5dd53ca680d4332c0283a9ca40e5cf46b5cdfcc3c09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGWW2106167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6044c26e8cd3291c91a3067b3f1194398d8916d7507142366dc16c4aebf471. 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/QZ22B1887049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11583be35ec876e4e8b5d519fb17354092bc484c9313b5454d3078374a38d462. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZ22B1887051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e9902d477170afc6c4fdc84aef2d4a5789789952fd80a77ed9572364bd5bf8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ22B1887052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e09f6b677d5499c0513fba7e5e415440ae608f50251b196c3b263b65d72db. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZ22B1887054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28939390da6b5f0afc6bd36fe132680e3ee5076994d4d7fae4faa816363cc2d4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZ22B1887056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb4fee2c3e7fe24c635f87c3c2cb1529c329bc7ca1604444e4e51b187b042fb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ22B1887057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272895a1bd06cf61fd4f2562f5cfa96bdbf03704aaf234f59d1c1a61c5aa3b5d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:29:51Z), 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/QZ22B1887059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c99146adec99dd27623e7c92322619a6c4f9b5b99291ca5cae73d773f076e. 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/QZ22B2056331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fbd2658480da9445681114ac89c5a0fe284a330068d7bbcde0bb3c4a0bd6a1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZ22B2056333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8929081f8491cec8f815ec0e7752c1611c1cfa638e4f9b232f9ac961bf99a6de. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ22B2056334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f431da13a50c54fb2f5b90af29de6a7c15f952c7b05f9d0de2430c0f3afa1e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:41Z), 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/QZ22B2056336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6a33f0202580d9c563d98963668f5de2d2e61e7b3809dd444997d278d1ef16. 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/QZ22B2056338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c54b6527eae7f2aaeae5ab581cdadbff6a71cae751efe582d53362d8ae953. 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/QZGWW2114195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5709bb0ffb0c5d3b7a741f1d5d69c8fe5074cb30bf8a016fe52f7f2cfc5043. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZGWW2114196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c10a406faed41ee07c89a813a3048f12a41084accf40ae0a40d4c578e29e830. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZGWX2086194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ab1a20cb8928d18cd210b3154844c1986cbd1b07f0d42fc6909e62e9295b5a. 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/QZGWX2086195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8eab0ecdcd8e47583a71845c93af1c4c0f2c73def97b8c3f1f30cf824fed73e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZGWX2086197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879a12ac0d105a9e6479afba2d12a2c7623b7608f3570c964b741a04a0fc0f91. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGWX2086198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146c98e28f00b93daf7b1e09b1eccbcb4619c54d85d722a91d617bf5dea3e03b. 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/QZGWX2086200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778e02bbf86f5c0b78bb94ffbf6f29988c6d20964196329dd5e0a5f93cb490a0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:40Z), 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/QZGWX2086201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238576a7b6a6719e9c5e8a9a920bfd7a7c9649b76e6e1f2b8c5c91302fc1736e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGWX2086203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd09eb4d150618e490bc37583224870fc1bd6fb3bc95b5fa516cd51d6433e555. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:56Z), 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/QZGWX2086205.