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 0x72f26426fe051bb8c6dd14be4a275353bc797f157d24182ba9fbfa994adeb7b8. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01838f0b-35c9-4eed-8875-4dface7b7f04.json and https://artists.proofprofile.net/proofs/artist/01838f0b-35c9-4eed-8875-4dface7b7f04.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 0xc48be5f5a5808906b9d9c70696c490383eca8bef6f06fa276f90dd461d2c2438. 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/SEBMC9435070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f16de3c52ea05eb6136159caa9287866f8060a1c870fc7b2ee0869cb47de3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEBMC9435010.
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 0x25812884019a2d7dd2f864e0ee689c070084b5a3b0d876205763fa280b95cb93. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEBMC9435020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88f85b870f0975bbea7d04550a57efb97018ed1afe923097a9f3267d003bfdb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEBMC9482010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd69a4276234dd6c01e29e1ddee20f5eb7ebd79e94dd6225d671f53b82e9cae. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEBMC9435040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b8a70e79f5d57e0d4d168d0898ec69c50f4b41e03eafc364df929fa2f32cf7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEBMC9435050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571de803ecc66c4c4bc1e724cbafcbe2a50b7e9c075eff66704881c08ba34cd7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEBMC9435060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b87d1d5c2f96c1ab2a954deb9ee4bc07b0cc34300a24ddf6fd56ae6fe37c4a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEBMC9435080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6568bcac101a05c6cc6419e374d420ec23f153b842c6069ad1b49ab11dae43. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEBMC9435090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d4aad770d8b780047c7039edd50a2dc57ace405a958e241a561df12b94422b. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/SEBMC9435100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5272c5df8028e98e9570f72eb29ae8d0604c51a2162a62c7b04df6b71b83fdb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEBMC0600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d05ae51ccb5281186d1b5d5fad4321c66a9a0c2aa0ef49684138db955aff1c. 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/SEBMC0600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8a1c7c49ddd87f6f450180617f6258f0bf6cb3edada79ded6c015608d858b. 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/SEBMC0600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277af47525936c2ad702b6a6c216f80b50f68a69a0e284752a62ffb504beca68. 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/SEBMC0600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bc9aad5acbda10733db5691246b2ca9e897f40b66b37efec611a961c1da893. 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/SEBMC0600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde54ade4e0031913b5e7a939f662f9dcac93ea66456c761fe2351d70d3a98b21. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SEBMC0600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39c9c7a6c1a9224d4dbec83604f985b8a0f34e6c85d9e9fcd10ba5a3b822c18. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/SEBMC0600082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ee8fad9e3b656eae17d4de1f4c4b1488bee2da45267d3cef2f4bb74b7b7ea. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEBMC0600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1782e3de08e109101cab524bc1b0c75bd96a4708d3794343693aada82eacc8e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEBMC0600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1d8e4b1adb79a824e1e4f3d0bdea5283bb66d84d4af73440620a71a4175c8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEBMC0600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f58d56e2c21003b1867adb47644aaba9bd7dca45d379a00290d1996305cb18. 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/SEBMC9030010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158d878ca240b9bc9f793d840ad3549de14a51c5dc3ee363251795746758aba4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEBMC9030020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886e3136e7f6ac8cda52c44a8edf1df434311f25ed954d4652a71013c56cb3da. 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/SEBMC9030040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de431c282680201f2eb7d4bdcc920c49ce3dc704f3fba9a7928ddfac1cd220. 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/SEBMC9030050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb22389f22c8c451aeee0a9826dfea50d2d74df21b184d919c5a1e7c74f4bf4. 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/SEBMC9030070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0a12e6d50273e90d3a933f218ad544d21cb81157e1d74d1f9d99be15d38244. 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/SEBMC9030090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2bd0e1fb033c59eaa0d026f29fbfeb2f9eeb2e2af40f4f8e989272a6705f89. 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/SEBMC9030110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc582538e39940bf70d672846f1745b3afb428334d7d07844d76ee753b0264e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEBMC9030030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a67124b01416592d8d6ee89336522793d86a01d4a77ed81704f41a448278a33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEBMC9030060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71511d8c344cbaa959cd9e3c270e49193840c0424f8f2e0878261db8ac1f5b93. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEBMC9030080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e3e31bbd8ab785827fd1c6923942d3ff6446d91894338eca7174b8e9f1132b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEBMC9030100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edb1dc21942afd06d1eb76b7788565c0e48cd0d556e865ac44ac5363d018d77. 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/SEBMC9030120.