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 0xcc7432c885e727abfe3e2d08db58ce75c464e04bb74d6351d444171d50a30151. 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/4e83d09a-68cf-407c-ab06-9ace5c987c89.json and https://artists.proofprofile.net/proofs/artist/4e83d09a-68cf-407c-ab06-9ace5c987c89.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 0x5f0a47a2cd2924e3f4be07fceeb8cf6ab96d452147c05db621b7508fd53dae62. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/PTKH11200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d079ef520243bfef92953f46f9a5b96c7a27e6dfecccf58906505feb2e754. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PTKH11200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246e61b474063b89318afc8fa15932b4bfb8a3705e9d16b356e358ee92d4077. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PTKH11200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7240c11e0d0edf798bf4f35566b65938dcc7e7931860270151010232963798. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/PTKH11200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b18f80fe97105e06d0ace5d4e36e61b03605fd9282041e725f87e9b072a3e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PTKH11200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0a47a2cd2924e3f4be07fceeb8cf6ab96d452147c05db621b7508fd53dae62. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:24Z), 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/PTKH11200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c76b1c9d54026efbef0ad94904b5a959095289f738bd252b92324eaeb3f334. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PTKH11200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ffa926652970fb0f8c60f5f69b8124dfb3a5323d66c9dd8b538f9d9198cfea. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PTKH11200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4962c8e4489e170433fb1206a89ad6a731182ddd78a63e36bb8a48c2894cc34. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/PTVC11600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c625cb70d4e34de06106fe4cd620abfb546d4f3c5931f18f80287e405133132. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/PTVC11600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed50959654493bd0fc73fa31904efb2275db884141ab2e4599ec68559f4042b8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:24Z), 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/PTVC11600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bef141a9474fca41523169c7fc473822f0f89bfffe9bbc424870add2b2a63fe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PTVC11600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9720e319ded3da1defc7cc344f866790e5a861b9e2e8a6755a71def70cbf49. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PTVC11600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d079ef520243bfef92953f46f9a5b96c7a27e6dfecccf58906505feb2e754. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PTKH11200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246e61b474063b89318afc8fa15932b4bfb8a3705e9d16b356e358ee92d4077. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PTKH11200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7240c11e0d0edf798bf4f35566b65938dcc7e7931860270151010232963798. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PTKH11200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2997c1d25b7c9aa7187e65382117ed6ea3f9e31a2c502a241fbc7e72e8bb0c2d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PTKH11200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e68193e36e34bf3693ebf4e23adcac82567039b9837478e92088cc92293c3cd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PTKH11200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7b3628c8de180cd097ffd527f0383d5df024ce61e5631dcd45878ab083d3af. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PTKH11200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe916c34bf125e4b77a224fa528ca6828a456a6b1dc9e64f46d823ac63c60bf5d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PTKH11200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1238d348a77f2fb60b9a352f4623c1ae6ce2c6ed33e1c4197a1d9b6e94bf7f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:36Z), 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/PTVC11600009.