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 0xc8d978474d16a30abb11dd7fea80e60fbe09c6d2727baa90841a2590e723a025. 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/0cc4824b-09ac-4e0d-a771-4a883d618d8e.json and https://artists.proofprofile.net/proofs/artist/0cc4824b-09ac-4e0d-a771-4a883d618d8e.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 0xdf93b71b17138ca941816976ef619069a65a65b7d478018e555debf80e0b9641. 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/QZW9K2309526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eb9465af711b8f8c02b29f5904a17d2df5cf26d7f6caf67711494a950d6d96. 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/QZNJW2403546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2048e76dd37143a1f073a7671787ccc2f18b86a4a28ebb94e296aa2d854b20a. 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/ES47E2008944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55355c30c1abf5678e5abd5bdbf377ceb5175ffd2d71633488b7fc09e2aea5c. 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/QMFME2138789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10e84eaf83fb321604733e12b8619ab5659f129448dcd2cf084c643d297feb. 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/QZW9L2343433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec8792264254b71ad8925fef8cfd2ba3e0f09db814cc7f03e11881065c4928c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USA2P2212047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9458c542b715362bac60529748b52efa46eb2ca70d9fb2dfd85f6cbe08e392ba. 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/USA2P2212046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63705703c69e317e3fdbf1405ff8091af60697c441c1c7e73aba22c8a9dc185. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/USA2P2212045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0177380cab543c825e2a3ae8ae2ebd7b68a934a3b578f77c77d8681d166209bb. 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/USA2P2212049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ed613294d9881e80f2dd6bbb6671b1f7f9b783359f73883f13883d8be3f952. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USA2P2212048.
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 0xd41eddab2fe326dc8b9481ef0136912ac2fed863cad8286a6fc6223f9cc50aa9. 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/QZW9K2438192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52bce6e1221abf9ec5a1a7aad0a6aefd9d2df0c6a6ca424a39a971aa299b9e. 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/QZW9K2494468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82c39057356976f67c3ab3bb922fabd3fd86a7709638fed5c68149bb7c33f01. 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/QZTPX2433813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7226c8134612321a9c30621d20e56ab08214d715fd68665075dc2b2fd907b788. 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/QZW9K2326670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79783e97652a66a137d50ba45cf8eff967e2c79fc624935855e45dc7dc7ed11b. 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/QZTVM2370064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54709305ef15f742dd34b4eac10e0b0eb88f76b576ab0c06572403934d6803cc. 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/QZTVM2340573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77766aa848fb9781e8bc25519be08db2485501af76dc88666468017be04e493. 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/QZTVM2340601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe036cb7ff17f48b07b0c8e927376eca7eff1be5a8a23f0be146f9b7e8db66174. 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/USA2P2308872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f00bb63cf03da69f5924b8b49fc8641d4996ac863fbecf7528d740e2e0e4f8. 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/UKXN22232808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf3a089e1f91ff1839c239be69b7920a8a8ec1e6ff0bdc59cd96bae96575d2f. 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/USA2P2228160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d9b34283dc58931e95af41f9b08bb4fc4a43668a14c2ab5c468c72090d0db7. 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/QZHNC2290282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591fc6319e0566abf1e52a87c3b8c48ddf7900d18cbaf51fd7b37210e1acd8fc. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA2P2224914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235de3fc26bba8cb69afa903d59ea61f25de0bd825b4dd77a9c69f4db697e36c. 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/QZTL92154109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681bee1be9dafae527adca72df3d316ecd7bc5d10e0e08dea9ee78efdf87a877. 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/QZTL92120134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2528bc6634f4944526476dafbf426089b8487aba32e71ff17530d1a2b047439. 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/QZTL92157173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ed69545721868964f56acfcaaa17387416397e09d8d0b741da45f5175f463. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTL92138287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876996e8107b83a244c7b25143444603414c189edcc61953544612bbca075bba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTL92119963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d362421298fe3ea68eb5f697ca979b2eca365d9ce39d0b8b14fc5695fc1cf94. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTL92142521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04667d491142c44400faf5ef0a72c08656b3a6dd777ef611bc9a27098b4427d. 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/QMFME2130144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073cd48dda9b2eeb8a3484fafad34355994ff0cbe4ed5009243798896efb6d9a. 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/QMFME2127502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec896d36dcb96ee207aac8bedcb5afac51a638e099e7256b3583ce6df0fb0fc3. 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/SE5BU2574322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f06c8d54567853f53ff4cf1e92c473815a5259f74506220939d60cb80c67a. 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/QZMZ92562463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeac75ca580f521734b53b6d7a12f42c67feb1b252b0e104525a30b1726fb68. 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/QZMZ92562337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1e0b8ec8f0b08a4a652f01eedbe77c7c9558dbe1062140d8b6b0a3383cba5e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMZ92562273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6a40d630ceae4fa7191476d20e06c41a3dc3418932093e55e43af4152f3cc3. 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/QZMZ92562250.