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 0x162040e7c4b44b49ba041f6dcde8348fe781a9d59b319bcacf0bc49edf3bc547. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb662485-4264-43b2-9fc2-0a14b94af0b5.json and https://artists.proofprofile.net/proofs/artist/fb662485-4264-43b2-9fc2-0a14b94af0b5.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 0x5e3a25f59e76e390a6cf5edb8f6eb8a59980b0a40f04c2d04a668ff3f8ef844f. 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/QZTPX2165565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940bc0abbbd09b0fbf3862ed11d37e5718d415708daa272c3b1d4dc0c6e1c2da. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZGLM2289736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0365c5189f5ed6a2270bb0dfa4fe06d364004ebc526370bbe8171d89e2c79ed7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:49Z), 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/QZNJW2231617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7376933d6716b176577dd9a22b250da06b541addb3a090afb49a15e4b008b64. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:45:24Z), 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/QZW9K2219971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3ac010af3b6af6a6398814f3cddecb1e8f0636c1185de532a926cd56e5aead. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:47:59Z), 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/QZW9L2292699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298003595f4272a7af2eb9d434036b97958bf8ae311d4a229457809ecbbba99e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9L2292701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992fe19c9bd6ea5602eb1511814243dd7a98806290f8d81b777482e31fc8c2a4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZW9L2292702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0b83e065e2daf42a6bc33c1b8d48f43ccaf45d3f02fde1bd73446cb91166ee. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNJW2391540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1b1a3aea3d62be503db0a8718c8d0266b42ccb0ea2d3abddb5cb374da4f1e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZNJW2391541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e96ad852c7364a9fde88a622bab0d172de6fb4ca6b1af4dd27530c749030c1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNJW2391542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aed5c0bfc121bf20de4c3cd94bf60b78e4cbf12f4d0bb3dbd23152ad69a6fd4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNJW2391544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9008dd41aa9e70a7582028a901271741ffaccf585a430bfa84a3d107b06db9c. 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/QZW9K2398929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827bb8826107d59f322f6d60c240b0afd1ccaa432347ea33cd588a3b097c1863. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJW2427210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d2551229383a8c0a3eb532b5c6ba51305eb30ef59eea337ce9bbe5ee3f535. 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/QZNJW2427211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b9055daddb20c62648d85b2f06ac24060e28e8eca722c6c46e4d797bce37e. Chain 2 (Bitcoin): anchored in block 957822 (2026-07-13T08:02:12Z), 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/QZNJW2427214.