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 0xe43d44d453421c63a056922f0ef93bc0775d8b48df76242ce4b14d342664093f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2170142-5f2c-4527-abcc-0abf31952680.json and https://artists.proofprofile.net/proofs/artist/d2170142-5f2c-4527-abcc-0abf31952680.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 0xa22e312d2ea139d7f12dfab6df34c18cb66ed03d3e885c4d6def0a6e43961ea3. 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/BXN7S2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69572d834fdc2c0b62b9c4160891550c32e23544fe328c654edaf13271e5abf. 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/BXN7S2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3e818b8e822ad602f9c42d88394e396d80b8986f282b11cf6487ca0884784. 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/BXN7S2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e7108455bc1846968001ffbdb3c2e76aa0ac46d9dff2dbc9d247ae1a955a64. 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/BXN7S2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3b5cb46a18b5d9647c1ba6840142cf58ae29d8c76fe3e12d088c5d1257bbe8. 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/BXN7S2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460352bb76bc7bb1abd91673001228e3e44bb99e68e9419001e3901528a786ad. 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/BXN7S2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a66b5e0c1f30b006167f07732bf96679eaf7338b29d11a61284d1f9345f90ef. 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/BXN7S2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ea3a1e154fea4b269d6a08c849f52de82f62e9143463d8ea947a7e2d405301. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BXN7S2200019.
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 0xa685195015c90e659ea0f9a0a605ab380f3a647c69533fcd15d5d29bc8f6286c. 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/BXN7S2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf238b4a4891496bb5f6fa20a100c7aeaeddd43a23b9ad0823305890978b9fd. 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/BXNS72200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25298d07132be9a6add58f76793c6578f7356dc0960cd8d96f5ab43b4f0f5d73. 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/BXNS72200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab930a199380de13a2e0c69dd7bd1b40eab0bc63cbb0f768323b51d6011e4d0. 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/BXNS72200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44026b95b096c82716c087e20e56783bbfd8e40c04164c3718fcf3d5c5e1b6f9. 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/BXNS72200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860b791b5aeb01c4ac8c84047893ed404e4e752f5fc45e16dc6e1594df5624f. 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/BXNS72200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93b69f2763cbdbb8b591f87b6839c2e558566642d7dea4bd3c7acb15a6e1993. 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/BXNS72200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa6e92db8d304fc501f180b4336273aacdd33dd9082af1c279152d492a0221. 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/BXNS72200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604b2d742bbff82f8f84e16a7d36413e23e843144f7701d006167d9d04f04652. 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/BXNS72200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c6ee3f57b3a65e7876ec3a3071e592f0ee33ef7a54750b82d1727851322e9. 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/BXNS72200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a59d745edf3e4b5dd48cb0cd4aba0501d0865e72c29a5b0039b13386a50a1f. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/BXNS72200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd00e358c1de5334cc9708460cea0a740c24e0af89f23177e4b8187ce905d467. 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/BXN7S2200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff103d1f9710434992b2199872706d8f5d3acb1002adf3bf86b052255290e20b. 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/BXN7S2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09604a391a1bcbd1ad5aa21093ef485fdfe6c515adfab1fb4a7f25f6aafc4dd. 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/BXN7S2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01affad4ab8499d9abbb62c21b9668182da31793b59f59698f2d6fd5dcd8853. 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/BXN7S2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc26062961678741f5f12118513b4200406bf56ab047b35f2065891ea0f426ab. 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/BXN7S2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaa14369f02a3b1528f273f7ea3f89b730a10e2beaa4a9b886b3d071d165839. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BXN7S2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d54871b806ef6ecd59b255a986e6ec34b97eaa4891fd9e28ed5c2596797531d. 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/BXN7S2200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b4a3f6e38f2462acb795fa60a4a5601248d2046d4658c8019dde985537636d. 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/BXNS72200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae483537db59703f3240a7fffad740d4fd47cac3c8866404aae1eaa08bad3917. 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/BXNS72200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dde5f7832cc13ee64b872f705711d2012c2a424785b10f6e2a91595c4ee78c. 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/BXNS72200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7944c1a3d0604bbddb20c945203fdcc68739ae0621b2a06a3c3a0b53c9f741. 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/BXNS72200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9f906d430568a99b235fa74577c505dc24af58f57be8188b2eac8ae5be9bc3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BXNS72200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5361eacb70e2e765fc3fac39d63bca3ef17116cb02ea7cfedef9dc1c1f5b42af. 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/BXNS72200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ce44ea8126217ae56aab4927701b5d8a7029904dfd0fab5d3253a76683faed. 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/BXNS72200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfef150317b40ccf40a6cd00a5eded8e8d92768ea3073fa165189e112fa7a404. 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/BXNS72200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312819160454da4a784ac2867624936b7f0b8479ba78be5648115f14c6592a82. 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/BXNS72200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fc8755176e6393e0f75f8465df0cd8cad99cca1f64ace1290195d9af7a755a. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/BXNS72200116.