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 0x82b2b1b465979e751405221da77b4f19d8bec99ee57dfb9c183050d63f83fd10. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/648902c4-af3d-4c99-ade1-37490cba1a6f.json and https://artists.proofprofile.net/proofs/artist/648902c4-af3d-4c99-ade1-37490cba1a6f.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 0x5889e7164b37cc8acc11b91fa64294dea92903f5c1bd5644cc01c4f8372a5270. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRMDX1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c701a4b7ee48219f62a74e0cda06c5829d4f535e2a6d95a1ab24ac4176d7d15. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRMDX1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f6a5134c48291ec5f709af939ac97591e2c81e8d86b2b9f7c5c677c184a18d. 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/BRMDX1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950962c290184991058d5b45e80cf923de8cf7b8c3914e7fe8e93717ac2a666d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRMDX1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2232a77358f1a447f10c6d29baf4dbe6bc1c317e6c617cc7b7ac5ae4244a3ff3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRMDX1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166cd41b142fdb4c6bd7aec83d19c44ebd8bccca7fbf73c916b15f3e50c85fb6. 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/BRMDX1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5cc89a3d9e04e811518a42ce06249736650ef1e7479ef49494a45fc84bbca2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BRMDX1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e5965aa22b454a24175d4b1a8384548a73625d518976add00bb37192e56fde. 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/BRMDX1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2601e2cd67522143fb42e78ee65b78467cce2b96e97c20ac97e8b9476d9360ff. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRMDX1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9051f1a2efc29aa4a516d49599df121d9b3687a7e62ac54d6439e945e7268061. 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/BRMDX1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346c2ada2364d79e4d73cfc554a118d5c67668bc4b54e6cf925abbf4c2ab15b0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRMDX1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1560c6d5e2af8e2c400a33adfb141bb79f6f93432f59477e10f9c62c81630562. 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/BRMDX1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aceb9fc3b2c02d2caa0b7ca0f81d4c4fbd20ba643a1c32c93e008e87eefcdd. 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/BRMDX1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91532857c7231c3a5731647d8d6e990414d90c999c2da7c563ea0069cf35d92. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BRMDX1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c75160c9a975cb42bdf605ec7ded1ae30f5ea040b6ce261f707ab86b04abfb4. 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/BR04O0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcdfc4f3b98e364e9b9853ed0b09bc7484a446c9d134e17b5a0f8f105070c5d. 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/BR04O0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf479e4a056e53fc1d69f2515b95ba42ef29efc6e5974c00cb2292fa881936d5. 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/BR04O0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5b26f0a42fa5088198d0d21c5b08699b83be84cf702f2add5e7207c8ec5281. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRMDX0500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f1e8fb870a021453cb587e74c7815b21826f5e44f9770aee37cf73c63bcb74. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRMDX0500006.