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 0x6a4c89ceefd0e36e6589da958b87f14b79822dd62153d51fd6087642e1e33e68. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3017e18a-e602-4b76-96c4-3c9b568880ee.json and https://artists.proofprofile.net/proofs/artist/3017e18a-e602-4b76-96c4-3c9b568880ee.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 0x702b9b127fb4a1f4fe8cc451a7ca50a95883b8285c4e7b79406eb4a6b6a13a4a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5AB2055227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215b677c5cd96b676b64214cf48f87694a1234793411cefe68ee7fa6f78d1e6. 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/QZ5AB2055229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dde0be3a467b660b6f18d9e568c1b1f3544f80aca0b90c1760868fb7448dbd. 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/QZ5AB1942888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c850410156be12c91420a5bf2b497cb1172fa639f314488b6e6eed4f7dd6cd1. 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/QZ5AB2012279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb7955e79a48df0b1806947d51071d90ddaa1d47189eedb259df945ef12852e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB1839161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f024e76d6f695352b20a492e2ca5377ae8f7b9f2ecf0789d338bbe98435274. 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/QZ5AB2055230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64a78c7863947b85c98285692629f85351e6af22bb7e2b42fec2782e64984c. 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/QZ5AB2055231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e036c39f35e9aad8008c48321ff412b34c01384611c087fac8f2b6073d68911. 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/QZ5AB2055233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace8d9242cb6db504d8890942db77d50b97175ef3a45f2819a4d5d21e379acda. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5AB2055234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f3924c58310937eb7a2a593205926d8a68587c6f6a981ba49cf07c22346e5f. 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/US7VG2034111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18e4cfa454a132ba993b436a27d7fc2429e1d0bc7b44a99d2f82b9c69d25d2b. 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/GTA0A2410774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d4a25da7e27a7bdfcbfc2f720af0309541767dc781d4f5f694ebe5e57788db. 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/GTA0A2410775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c52c19d9e2e8122d9956a10e97a9056865dfacfe256604999cc2416c2ed46c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GTA0A2410776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe910f62ba10b950e5a8f85e494ae483d8deae26d5e9749dce28ea0cde5e487. 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/GTA0A2410777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3684efe36bdf9ddf2d8861539816c9d63dd8b175da221cae004eae3245dad0. 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/GTA0A2410778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf80b59b5a1e87fb020619b4d11f5b99eed1e72364336211eef82cced10c718. 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/USLD91758774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2067dab7af6523f96acc5edaa988639ff35d3bbb631839369b7e323e12dfcef. 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/USLD91726731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97286033c5a7bc0d79d6467b30a50b9695ef475122d031e04430e6557706c73. 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/QZL382283732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd908de59898f8ad4f6c489e36931d9c4c5143043a9cabf07e9b0a09154500b74. 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/QZMEV2100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb157728e8b471765987293293e82abf4bee87e9bc86b1e26a34779d5c9a23bb3. 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/QZNMY2105628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6470760d69602b0c241e1a7360b022e142abc809e7340c4324f37c34f98bd9d7. 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/QZL382283735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5546d32c2f8eae15b22028864acd85ac7e41f27283a500c68669bd89907be7df. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZL382283734.
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 0x6baefe11c8515f2e6566b62a5e2a95dd36c1eba8ad4a16a86d952ec1686ae1b8. 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/TCAGU2342662.