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 0xb0ce53b05aab3deb9b6418e36be53c4883394f58fe17c728103315c735ef90eb. 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/bdaf520e-1b99-4e49-a6b2-5064ca56158d.json and https://artists.proofprofile.net/proofs/artist/bdaf520e-1b99-4e49-a6b2-5064ca56158d.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 0x0e863f6a2308e29ad4aab10a45427fda13ffeda316759e4eb226d6982c205f19. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFZ61993160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7bec91889abaadc6cb0421b6fc6d7ff55d08f7cc9536d6f0d99f02d02fe4c5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:34Z), 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/QZFZ42004776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd811a070befc0127eebb607a34f2631f3cc910b026aee54ae3873c77416530. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:20Z), 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/QZFZ42004777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd07a97383f86aa741de5c1479bc6d14b7f5a8537950f9c34fb8a97bdc8f849a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ42004778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d918668125cb66f4050aec07889c452325f7b2e0ca15219863425cf666f6405. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFZ42004779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097310d5b0278936dcc4037957156e6afd76104f3a91e08375ae1b6b730ee212. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ42004780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fee039096e5b6024ccfd72c2def2a0bf348c59b825f4cc805cdd0a1960a3f68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWR2078107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64100843c05754acec4c4b4638f90a72021dde5d0efedc579e5eca153f342749. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWQ2056730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939b030b16219dc73fba2668b4087403155181229d59dd4e474cac1b38c25ad. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWQ2056736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f901d67122a1cecf600554b339481eab372ec4e8e628f53ebac23aeaa656760. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6G2236287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ccb5cf5685ac837ac2f50457b8edc0b41e1388fab592de1dbc517e96e2af77. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTAY2237873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d424f85400fa7d54b2f35f667e23f58a48d7cc4bd62972e432a1a3643992bbb. 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/QZDA72375945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651dc2c33bb3cafdb1367e4e640a8bea3aa995f429d193a31daefc247a23e8f0. 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/QZK6H2345340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a876f7edb71111b8ec7b4d6550201f17e7a754689d6240c9e8ef28c0aaa9ef. 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/QZFZ21920867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f42d73001875b9ea7bfd715ce0d9520ec0c5f5c6e45ffec70ad86780ba3231f. 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/QZTAS2314967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7add2af4ab183092f972ec9618b3183a116f7d4d73dc737387a14ee15ebe5d. 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/QZHNC2335223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c3537f980208503ec5e7a1c8ddf6951c6bdc9a5257d31079aa4e1df7291c87. 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/QZTAT2130208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbd0b6e7cc345a7908b130d4871756777f9e46b290eaca54ec57caa5d435a30. 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/QZTBD2387928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b69d2a15fe8b36f7f556883aef4a4d0eb8e763a23a93bb58a62e445090ed2ec. 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/QZNWZ2034827.