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 0x5155df5894706e4fa7387d8cbbe991b6b918c81d7dba06a07f10b67e9b87787b. 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/316fcd4e-3150-47ed-a668-f334cc9fe659.json and https://artists.proofprofile.net/proofs/artist/316fcd4e-3150-47ed-a668-f334cc9fe659.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 0x646ed64c18ea669e73037a707b46fead78592c8de76b05c6ee9ed7b53a98a8c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZ651209055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca387824a39ecc7242b1db9b386ae88b60ac27647e9f7c4d4a23188567a3723. 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/USDY42004078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e50418841e2adccbcce473701adb9d882e85895f34e4746ed56838b45e59e78. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USDY42004079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf587a433363c1ed2efb32d19ae69db9839567158dc33e6f038f4b2145f153f28. 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/USDY42004080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a1a3542cc6538efccec89d17e7a72547696b11d134d8bcb88dcfb786fed0a. 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/USDY42004081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3258ed11a7d776abc69b67f4ff85337e57fde6720fae7aa0fe534ed0b39725c7. 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/USDY42004082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f2aec3ea2cb7545336573497a739ffd9291903c61272e750f5ce632a5f75d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USDY42004083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183884f9c89c614faddebaba58211442f60a014c09dccfae0456a9ff12afd961. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USDY42004084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e4a2db3fb8b628ce2268fcc4309d15ce1e894d3413466fea9e4c5681497247. 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/GBSMU2071443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1631ab5510b6f65e38f6d792f7cc8585a2e8a8ba70f39630271ae1dd2a34f5. 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/GBSMU2071444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd5510697ce0b857d1b1c644e6f18cbe474716814c5ec157687a1e3c748c817. 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/GBSMU2071445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5addec143978cd76bc765bedc79cb9478c23d6a4c3eb84d58c5f4cddac760f5d. 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/GBSMU2071446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f0ea976788e29dc45f9ff686c75ff0f155e34701f5df993176f755ad709b24. 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/GBSMU2071447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ac6b07c731bcf0b64364b68635c1f1f1265c6c33b509075922ae8e1fb4841. 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/GBSMU2071448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287211d485b29469ab27e4d637cc06a48fd0d8e2177f9b4ad83a260fee9ce381. 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/GBSMU2071449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664636f45ca09555f94fd81c6cb2720387a8305f8012d8c12ed9c63c64d4488e. 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/GBSMU2071450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5e64f4bd5b12c832fc96c4e5621a2912bce07a1ed02c7dbd5575587db42377. 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/QZTBB2355106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb715f3ab91b23f32b754b6b8130a8ada0c80b6367b839b04d5826cd179adbb7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBB2355107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716817fb805acc84e80532c194854a9bf35b2896e810c066c06fb904f9a2b082. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBB2355108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e764fa4aa533b975c6a18309958c54a0f78e91ac43ecf1f2f265c1ac671c6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTBB2355109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392bc9aa7585bedecda72121a833b28bb8aafbf95d7a0ea9ca9bd3dd6baa9a5d. 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/DEZ651206137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7dc2a86dc6e2e2bf9eb9e7fa71508442b7065f13cb54bacd89e58ec9e02e84. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEZ651206138.