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 0xb6482f3fa775a7d0f852cba686ff4633ca716cce84cfd42e4a862e99b1fab1ab. 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/b41517a6-731d-4d95-82c8-c1f032fcf488.json and https://artists.proofprofile.net/proofs/artist/b41517a6-731d-4d95-82c8-c1f032fcf488.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 0x2bca3d60e69f4e9c61a8b5156b7108c5cc8339d66550e7d8f789fbbf4faac2fd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BRBMG9701385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865222d85fa6dfea8e1d05d237c5f89dba46f0a75e9c13e2029df0067d7ac610. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRBMG9000688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeebf21e5e5ff7374aa98a544214fae4ebed7855f4d1154371a2ad71094fb322. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRBMG9701393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490c166b3302e91c31e332872a8c41bbae1a64a0a9a3c73261a6386a1a6e2cb1. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BRAEM0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc37a4bc88cd01896a6c02f86de32a707b16ed6c9b9dbec785205f7d652e8254. 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/BRAEM0700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21737b05e6e1699f12cbbebd3e99b4ae95b2a818a3ea57c3a827ca7832358382. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BRAEM0700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dff08e1c7b687d13e19c8f6e6a56098bab3f494ea660999a1a9818a8d1b9dd1. 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/BRAEM1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ede9ca3adfc20d25b325a5a3d90f4568cf8381fb67540a02ccffb730b02f21a. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/BRAEM1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c039d40d3666433fe230059e639763b7655d60f42e504bb804cb0163edbee6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BRAEM1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d09c3077b6198a07655834c1a74a676172f1b5eae83185fa8b8ff37bfb4aa7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRMAX1400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4d1729040dee00164fdb5b69411ebff50847f87f527c7fe882439389712df5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMAX1400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ace986e5c6ca72e02f9dee2c751f3adf1915665cfbb20ee7f94b280bfc509d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRMAX1400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8cba3e27f73448ab6c5fc893df087782142e091d6a2bf5ef02d7e3db468849. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BRMAX1400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9501bd076027dd598092732e394f5a76ed8d8362c93ada079eeef50475cd8b9f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/BRMAX1400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfda0bd5b771dae5ae7f59e29122b142f09ef4a621e3dbe17684cd3658ff3e45. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BRMAX1400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e19d2f7f1d2ba90bb7f258c53c847f2be129e4288e6c540beed5572e0a53e8c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRMAX1400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041cc2e285510aa6d5855b6c4d9efeeee7bcbdb34dab7d5f28f0718a0c336ec1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BRAEM2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e0fcbe9d1852a6df4c60e75c9d5e8f1b33733d50112eeeb68f0578f374195. 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/BRAEM2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c3ec498d8c27bacb013b0fbb283c07d1a3fe9f8afff9d459024a881cb1e61. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRAEM2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7807419545eb5de0ca2bda0f68f9199bac39fbdf09afaf48723aa131d32f60a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRAEM2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe78673c7ee645a8b4f49ee84fe4f9a9cc68ac9f339e568a6329c53b60e3c542. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRAEM2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993a16b92e089dd657fc67e93b719f7f4b83a04fe5f5fe8af5a96181b138b523. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BRAEM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c5b282dc65fe77147df7adfd59bef404cdc8cb098bc433e400be322e770ac. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BRJL22000004.