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 0xe9542068e2a31ab3147c990dd892ddef987637948e6f1a78b0d8f3d97becb422. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dba150b6-b888-4af6-a2e3-2a6768391bdd.json and https://artists.proofprofile.net/proofs/artist/dba150b6-b888-4af6-a2e3-2a6768391bdd.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 0xfc313d1fbd1ef9ed0ca9d5f8f6072509da34302fd60e3abb497e24d9ff253b78. 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/GBK6Y1914101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8651f846dd2b22742f8571e72f1adb4667c6cd7f3ee701a8df8470e4cd5925f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NLZ542000324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196d424678191863eb7fe93b9538bdea735ef3e87c3d339acd5328592b9c49e9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USLQ22180342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765f10447427b7b26d2fe48854889db96e6f76d2c160d9c078fbd8edd47ae12. 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/GBTDG1302463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0745aa53cf135d281ccf5d8e8911e8224c64e0f7fc86f7cf383441e87f66632c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:24Z), 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/ZZOPM2226649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c4a8d604b787697e3fa6ce6c6888c53360d592d874cecdbf5088255f20c0a. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/GBK6Y2251511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5cc0f4adce59f719fe026b751cd2fe5f23a9be805716b0dd649f5b9eaa0067. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US39N2307723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7265d5ce623921e5b68390aea854a564ca00f184ae8bdb89712688ba0dd7b97. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBKQU2314263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9588a4b91fcbfe6d9076b824db0833c93c1b57f8cc0808d048249453c96022. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:40Z), 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/USLQ22180604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e836c17b374b6582be17ad212192c062054686e294c414948a09e89ceccc22. 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/USA2P2521677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe783fd4cf51a3205ba9f6f7a286fe72a570f8707a888934a58c98af061694827. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QM7282588037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0698f8739fa9df6917c032813452ea037c9a5e1493f9b1084800fe73c003fb3b. 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/QM24S2106775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3c3f0e1dbffaa55f27b4b1cec36569db202f4c0a6c4f233c51fc458041efa9. 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/USA2P2471092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c9c20e59de12c4a0ab0e9b5bbc724fe0eeed8dce3211a869076c831327b16a. 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/CA5KR2515158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00876954b0d5bfe43993694d0a70f627ab9010c5252eca19ca47d03628deabb7. 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/USA671500344.
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