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 0x995d5dc49a46c9c624831e7a665b72fd9ff16ce8a8e21cfdb612996804bef023. 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/ee5a57f1-22fe-479c-a8c9-325c6024ef60.json and https://artists.proofprofile.net/proofs/artist/ee5a57f1-22fe-479c-a8c9-325c6024ef60.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 0xc5c8a48d659b26a531f62366e217f060ec68d9ae6d5b822544573ff709a4097a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:05Z), 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/BXG6R2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5e1f210a37c285dba62f27a1caa03e4407110060817861e1e956edeaff33cc. 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/BXG6R2400675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c77b6558a3268db88c1ad3bf47f7373e26f8429f0d997cf93767d48f92865d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BXG6R2400746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776a09a32c5b2a66cb54fcbb9e3051d3780aeca6b551ecc5c157de7540456260. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BXG6R2400909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776a09a32c5b2a66cb54fcbb9e3051d3780aeca6b551ecc5c157de7540456260. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/BXG6R2400909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3821260e2316a986a990731f85fed14e34a0122b800c691fbca11cd9da22417. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXG6R2401068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72e3d5c6c9eb6bfe7cbb762ee6d6855a76b648cbe7169351905c3ce7ff50b58. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXG6R2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d728c88add5f84b0d43a86044d5107b864db6395db1a73f3dc33a21fae289. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/BXG6R2401073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ec5cac912f3cbd01dafe8e50ac6243059228c2618b16a91279302cef9030a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BXG6R2401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d0abae2251e6a0c8fb2e32b1551e5d07b1cf731b9e5f071314b9e0cf069014. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:38:57Z), 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/BXG6R2401081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a6265b0a009c0acd2f997d9058477849453fb1037636fc39fc66cd85bdfe7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:53Z), 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/BK4442400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc9df76767ebd00fd966e504414c9a8c2476c68e1f4671ebcb343837bd5c3d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BK4442500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d344892be78e85154c6d9000a4391d32223dd0e183b9dd6d11865e04ed97121. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/BKQT82500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd184c472c40eb0af7f27fc71a7dce56bbc8ccefbeef371e5015479478a3e659d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:44:16Z), 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/BK4442500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe55836c7d23bcb6eb995c1ffc98a07c1b6a47adbd16ba264852bcfdecbe06e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BK4442500468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de92b5a4efca6ace64ec24b621e9ef8e2f75d5825ca009550edcf3f08a7c42d. 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/BK4442300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804600989f01253b53ae50f2d6e523cbc7f0f8478c4e96892a6c1ee92bf50d20. 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/BK4442300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aaf428e431a9033ae3618b4018635ba70cbef9005b7f13bc1c1c33f1fd5fe9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BX7P32300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6276700c56280c0d3728ad09ae3cca8f9e679c2ec6674210486968431e8d3c. 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/BK4442400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce083f3ed471637dccce25c6af3080f0714ff2e3bb5006960f2608477cc638. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BK4442400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2708a25e7fad8640789cf55521b74dcf8b72484c09bca613f1feb2350c5fb203. 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/BK4442400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe377288f577484cbf30210b0bf1c868031bfaad7044bd40984740883140be9a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXG6R2300929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349971c8a0fadc247a82d858a58989cb264e41c64adfee716826f3ca4865b67a. 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/BXG6R2100965.
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 0x797aec2e370b0329fce032d4090c179e29009b25430bc4c30a00608f8e44b389. 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/BX7P32200009.