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 0x1da79532d3e45d1bbd84efd9dc82eb208033222cc6303cd7305e580ff7bc94fa. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d89cd190-dda5-45be-83ba-10165503ee36.json and https://artists.proofprofile.net/proofs/artist/d89cd190-dda5-45be-83ba-10165503ee36.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 0x2d8347ef432c4032fb3d907455eada3ea5906ebc90e71cea2049461dd2a58d89. 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/ARV7X2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2426a0094b70f0f42306d0e268876647f33bc8cd3810eae3706e488b6773e2da. 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/QZDA82024890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426dc0f7daee63dd1a2f31071dc5118443421fd64978284bf3aaddbd9c28fdeb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARVL22300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5449cfcb8cf4e40bed16b9fd2831323c3e7bdd85ddb5dc7c49de02595c0e2e. 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/ARHXW2202549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fb7e07312a690e3f1af12ce985bf3fca3e9c4d3fb1ffe8e9dd0d904684fb3d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARVL22300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a19a7e9c0d4c6761fc35df9c6b25b994fae3e3b40dd0015caf0c306602adc59. 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/ARVL22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa009f77b3fa62a622a2e934f87ba32e80483de5476c1bf75bc1edcbf099d7481. 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/ARVL22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9751d05084719e27ec0fbae7152044659b1089821abdaada333e51f09c4da613. 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/ARVL22300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c00fa526e3a5ef2430ec4138e4d150e8b0e3560be6ae1f481107795b5674437. 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/ARHXW2105675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16e5c3dcf573be7b5627b19e92def2b6909c226e81827ce318b522799a229da. 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/ARVL22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8132b81186f1c6191789f177f2b57face764dbdc76b6cba9cb208b1808262010. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARHXW2201254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d4723c1325db440de12289df251a7906a46d0cafb650d4394aea6b453a4f7d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ARVL22300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8132b81186f1c6191789f177f2b57face764dbdc76b6cba9cb208b1808262010. 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/ARHXW2201254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf937f33ec59987da74756304076c30d2f0e537bb59cede1cb891387ef426e7f. 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/QZW9K2481235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98627fada08ed809d962452ae502c2a88f1e8113d46bdd8a059a7ea758fc5a0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM92185969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7dac8a685a5195eb19ae5fea39e25d26f8a47c64fba89d59782b6108b02f05. 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/ARR6V2100316.