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 0xad5c1cfb2d950f822eddef6fd3a89031ce2766fb49284fff020c6508774bb0cc. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac8095dc-3c7d-4369-85d4-d30317874b78.json and https://artists.proofprofile.net/proofs/artist/ac8095dc-3c7d-4369-85d4-d30317874b78.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 0x0a1385d2a203cadf9d1f90edb408a4bf183f087f8f58c3e6f0e41080dd0a98b9. 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/USJ3V1815865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b2a80de3ebd7219c70d8b9a03aec9ee7a3a79b295538cf6a6c194d0ccc1cc6. 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/USJ3V1815869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eab03240d2e737979cf9ffa2d4c282280e9656a4e9ea93f337b8734df16632. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USJ3V1815879.
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 0x97a927231ffcc47ae9020efc887c74c78569d3219b532797c619a56ee79cd02f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USJ3V1815884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dac193005464606f7a2a317d5c0a954da27cb5c86b82756ad26746908e9e8e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJ3V1251690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4506033b3c483b543a1f08ba7e29d91f27c75efeb536b43e94229a094a50d7a. 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/QZS632128668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3ec2fdfe6ce8c253b239eda476525b8ff6b1aa5f1b04c2d1a939bd8a2cff8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS662170864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e208fe6582c9fe7e46ba78fab8d29dcbe30f951c8abd6940a02b6fe3d971d0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS652100798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77006e3260c659a43927ff4551fdd8249c5d30eb58425a808930e63741858d85. 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/QZS652178665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02527049e6555f5a2681ae7bb80ba6b1b97def188121aaba093d4bdacc90a1d4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZS632198024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e860507cbdc9fab41223d51b4d664e14ce8bad3549cfe8e2b07fed3a00fe2e. 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/TCABP1364622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f43d1b7473ab1089fe143b293b78be2bd84b6f03ddb5ce0c2b0ae647899619. 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/TCABP1364625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcc8d862f50de9b0688b0453e33ac51a68d3c9dec6f06854ea159f0d8a6c79b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCABP1364628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e66ee5a54988470d0e38e4c8c2359a50580c67c297bb3efa24fe908c9d2c25c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABP1364629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23fb9d59b55c43e004b9de7c7d91b3a381ed3b5792eb6e51c9e112b2dc92067. 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/TCABP1364636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7f8134279131ad7619ab01c08ebaf45f7f97628a6c1cc0e5b5554f87840a07. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCABP1364637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2c48dbde0354b8bab78be0a4dc6219c33269c63b8b9eb5e74688c86264196. 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/TCABP1364641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aebda8ea893244d85a7efa083638992bd0390a662bd259906b5fb22ade456d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABP1364642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56a8a9f76ec457ac1e1d4b4b80bfb7e44e72f5e6532d7db4cb5129221fc9e4c. 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/TCABP1364645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce0f6fa8b07c54848da175127cfdb9e558274b4743656786720704834692848. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABP1364650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197d801693e436a012cffe2002092a332d5cfe981b74d51c701553c171ef110d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCABP1364653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f250cd7bc93f5f032f9d64baf729f6552605e5863cf3fd5c99111cfc09df447. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHK2079478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5b86536845635b85c7fe315f931f37696a0f3f510f7982cb28770abf986399. 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/TCADY1864933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe946d0c4140555695e17b51061d725cb66ca1b5a7751fbf29b98401b99beea31. 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/TCADY1864978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfbbe4976922dc6b5b563984123c41e42b19ce9f51c8cbda31e8c7ed6155d0f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADY1865052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba52743cbebd8c1c8e911910d5ef945253a0ad37b151529c769d90e3d150b4fe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCADY1875620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b81c5331c161267944d9f8aa41a3baf1ce107853a4c66bd781da2fb903d3d1. 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/USJ3V0905454.