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 0x8620d7882b172d017e8149fa26d78cd94832b018bbfd3d0e71908cd8d839bb4b. 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/7ba502ce-f4ea-4c79-a56f-0d03b78daa34.json and https://artists.proofprofile.net/proofs/artist/7ba502ce-f4ea-4c79-a56f-0d03b78daa34.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 0x427ffd5afc75a7c491a95e59a61eb59eb67037a912373e0c57efefcb237848fd. 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/QZDQH2383870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6636667a550228fc95ec307831e2388f049ec649695ba3e754b20aa918e37c. 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/QZDQH2441049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044bcaa8ead6ea15c7f719665bc23405c6d4bb0c86bb3b2a988ab1c88a4a3465. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZDQH2441050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448b80d7aeff23a099ad6beae40bdccb8ba9c8627ab92b237dfad09ca18c65c6. 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/QZDQH2441051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4a2fa44e35d4a3f7ece7ffe9fa4d7397180cb67e4eae9aba3ea5c7ade25db3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:26Z), 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/QZDQH2441054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b35048abb4e72b227186493e35f4c49ef4ce1a17c3f17b6b52b34c018086eb8. 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/QZDQH2441058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac44f09e01401469bc0fa418ccfa1b9207239a51b0c99a65f95a0359ac5035f. 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/QZDQH2441059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70d4aca65339936c8122266c15c99dcf0e03a62736c614f76384daf907ebb5d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZDQH2430276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5397a910116d49a68c3d8522880a6bd3f1104b746ed41256e06a8e0b6526f72. 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/QZDQH2154692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09474abe7bbb9dcb1626474400065ecef7763bf7fc3ddbf45a87bcb235aedf7. 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/QZDQH2501753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8165adf42de6c499b18a95a0b6161e48ad2fe1092ef8906749c0d1686146036b. 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/QZDQH2444666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11097b6b39b860f24705cabfeebb7eb079d84214f9adc2822dc1b7440448dd1a. 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/QZDQH2444663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8991c75b5a014e5272d398052fc2dfd8fcfe200c06c89a8c3ee178c8ce10193. 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/QZDQH2438567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f67519ca15c45bfea2a9bd01dfc4f54777806d9d92a5f485e9fbe51052def2b. 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/TCAIX2462747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82375037b3defa47e20774f02f2cb8a83e2fac68df09cafbdd311ceb7569b4a. 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/QZDQH2427461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c29a8330dfeb19267fb0d2aeb06df6f9eec8cc19feef890ce2e2e31e49ea8f. 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/QZDQH2426689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efaf2fd5a4877d2cfc003529768d4b2d92c3c559aea712376de3cba0a601937. 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/QZDQH2423925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc690cef993b1dad616ac7ccd22a9292aa8056e4d88fe021feb0ee04b45b43b. 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/QZDQH2416334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb136a0f2cb2ad4a949bf18910957f3aab6d6c32250a008b570349c4117717f96. 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/QZMZ92422426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392cb5f7063211b3b0085c456af1cfcf1a8f9ee8ccb6cb8b656034bedb22dcc. 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/QZDQH2393817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4678eef9cc8e55b5f48fb0699a4b19fd5fb9b07442809ccab866317bf0b70e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDQH2389570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1df3f74509ccaca82738f856437f1bdc62e6d98fdaee4612dff6465de17d74. 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/QZDQH2375999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5cd3275a7752ae0cdd2bcd2a9491b6b38b7bbc45e0d56353c9449d4eac153d. 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/QZDQH2368204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf509c1929909c466d80badfa796eb5c9fc20c826e2a4bd472d40a8cc42bc19f4. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:34Z), 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/QZDQH2358986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611c0fd2b87f4cefbbc155cb4121de37ad71c47e95f40863c489fdfebe383d09. 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/QZDQH2350809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fee81b79dc6b225944e4a8a7f318d0e764df282bce9c334c29368ad3387321. 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/QZDQH2398090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e89233fb8f0c11f9b9fdea8874741b721cc3293aa18ea40149cc144560e5114. 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/QZHN31952969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e2eb510c102eda363c4359ebd1d3dcbb89c22186651ca68170561a4762c392. 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/QZDQH2158072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335fb2dcd7dbebb039acd06219c7160150f67a9fef0eae0468511871c669d56e. 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/QZDQH2255202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cad0d0866f1319ae71b3e27ab7daab7859248043876e576100780886e57f37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDQH2147567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d055a63d397df77b983b2bf94e0d8e255b29c024bcf7a5b23fa01cf5e0357f. 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/QZDQH2147108.