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 0x15a7f2bf1b31aee2cc4bb0fe4c42fe99cf9fc6a381d75efeddaeee445a9a73fb. 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/eb5f2d45-4e54-4f1c-8a80-d3a7bfe63116.json and https://artists.proofprofile.net/proofs/artist/eb5f2d45-4e54-4f1c-8a80-d3a7bfe63116.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 0x959317e311e55598e5155da6057a2cd6fcace0bd796dbc19810d19eaa23b9806. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM24S2105509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f519845bba6bedb7103cbd1ef11a0c9941a3b404f0686ecee2beebe6146922b. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QM6P42203876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587c8a1ce006b8c3c9f544230424f9f7971a082c868f1003a280064701f61caf. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM6P42209629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f3c195bd3bdf807743be2851c531a51f37e33be45d17d9d3c9b0fa2c5ebf81. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6P42203985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc006052749063ffe14a3493cf75047a46a1ba1308fde5bce8cb3ff896a42b58f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:29Z), 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/QMDA72265806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb3e5c726eb7fc92f13a4f72f547ba75b9e690162c13524bf2903ffea09742e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMFME2230178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dced20baca884c526f708a75e0f7d0dd3829511d10d79248d04c30973679863. 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/QM4TX2372584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f79d6acd210f8d207739299ea00386a9501291d2597b08f10df07d3fa5068b0. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/QM4TX2372702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dced20baca884c526f708a75e0f7d0dd3829511d10d79248d04c30973679863. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM4TX2372584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f79d6acd210f8d207739299ea00386a9501291d2597b08f10df07d3fa5068b0. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QM4TX2372702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea820f4a7cdd6716d649161753e61fc00f33564cce01beb0dfe57e64c888c58. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMFMF2340095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43153c3432d77978c2a41ecae598b98421fa19b35881aab090d686ff737e9b2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:24Z), 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/QMFMF2340094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142abaae2131c51429384a0ddadcaa289fac95bdcb6635cfe19c2f8e35b648a9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QMBZ92447882.