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 0x93f02f771ce1690090c85ea1cc3ecdbac3d417131fd24069f32c27a9732824f6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2512977-29de-4225-8fe7-fff3a7956820.json and https://artists.proofprofile.net/proofs/artist/d2512977-29de-4225-8fe7-fff3a7956820.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 0xfe26662041aedffaa80f67b8c6e0d94ea94368304d5030eb1338cc7027cb5237. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCACM1677506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1220205a57b2402b74ed832c48ebc9f0f9bdbeda2b4db1df2aca8bdbaecba455. 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/TCACM1677517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9535e2a0392bb93a8385497a04b9ed9d99e9378226f311cca62ac7c378ada0. 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/TCACM1677531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f44402be1c96be670dd0cef5b149f1b5947f6e7f1082f34b98f54f3d2a8841c. 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/TCACM1677536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e86437eec02d2a72102b21d3c895c73f33371ec58ac2e066fb67692a7bcee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFT2168660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140d84abbb3369877a585813f8f47cbacdc51419ff3daab18530a13fcc2dd6d9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAFT2168661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e3b8885273a40d25d6f1ffba06e291162e613a9bfdc0f5daa2e333e0a70911. 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/TCAFT2168700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a9fc82b431f2e6db6ca4cb3c24d2ff8f18c5581772e68060c0e53de23f55ee. 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/TCACL1614420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fa1afa7c314067e71149c883bd3d4d185be6175dc611c37db6ac19ee72dae8. 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/TCACL1614421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a7e2624d33e5be3dd8bea953837b124735e4edd81b35639f1c7fa6af97f79. 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/TCACL1614423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb360c9c8a71f6e5c88a001137f1b45b43a15340191d4a1d5dad3caf879f1d0. 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/TCACL1614424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2389091377c33f595bcd4286e18c4a77e92d137e3acede394266d816e3bbe3d6. 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/TCACL1614438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0051a4b9203b7a58f6dd7ea29b7022ff03065d38e601fcbf2d4ec8e666224a1. 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/USDY41515426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb86cab49d79049802be0380c6f9033b7a765b0284de3c693545951e9cfc222. 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/USDY41515433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7338d1f443e135b1a31ec6cd963df7f50342ca5b8e95e91a999396702f9fc0. 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/USDY41515439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a46b33b8f404009118df104b31e52fdc1ffa0d4a943960eba30638e8fcda8f7. 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/USCGH1747311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0461f95a4608cd518091d669e50441c5befb03bd7b404e02d6678206df850e37. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDY41712186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c8cdf87f7306da181745d4ef18ace64b967619011c75045609b0b346e2dc68. 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/USHM91671108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9bbe21fb0e6aa443d278a51eadb0f3a90e9dbcda9076ec0a3c0f3336d85d49. 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/USHM81789319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6189ebdc85f9890dd640bb0f8ee59786d8291d2f07679ef534dd89d90e6869. 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/USHM81789320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b552bc6469f88744b3346f1ee88e840451e778f79d7a59b452dc747d14c3fb. 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/TCACT1625726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795243b97aae6070d5a5ff7bf5129a3f3c6a3518288bd0127efc286cddd56b0e. 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/USDY41712185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e7e869c8f633e7eac5e94377b0a452186a16dcceb5423880db723a38c59119. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM81789326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357181afefe7a45a7558c8f7045410ee7858bae8d28195eb75cda9a4c0b1b8d7. 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/TCACI1506883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a470083434909767ef55484921440404ae84268c6f701619a561944a2f65da1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM81789324.
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 0x894d7f6865ce11e1496856be6a2fd5f5f49556967d9a500f0d88ef102a245de9. 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/USCGJ1738987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c8e77d300c3ee8ca59e363b620587af5a226c514069a7202a27e8aaf08a9bf. 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/TCAEA1995230.