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 0xd1e3c1673ef0ef44c9ea6da7e89fde09290d071a34817bb63d79c264887b1765. 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/64862a2b-359b-4e70-9b02-6202ea1388a5.json and https://artists.proofprofile.net/proofs/artist/64862a2b-359b-4e70-9b02-6202ea1388a5.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 0x3ea03a6365b3c7ee11ec9cf007ea38a028570b73552c0c8938f4e4a5848ba482. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE52N2360806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f8c3cd141b45c7f106eca21550bd54a2ab4ebc5a046e7fd313a3f223b4ee43. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:26Z), 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/SE52N2360807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69e9c36c7e5cd50e5d046913e1d099d5226aa5911f87de0f7109d9976406de0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INN242401474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca6ee3452d6286305299eb4a716e598f44691f20cf82bae6c110193f9a2b073. 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/QZZ8A2408024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000838898573cbc37f8d3ea90ac06be942199373164db2b8d3f4ac59efa4d831. 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/QZZ8A2451774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfc7c61496c80cf6e241ffb4406c0784b3078e2dacce0af128f4dbacb0e8595. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2460600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a69d84872381dbcfcc4c849dfc57d7522000c18cf218f59faeec39cb6c0c41. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZZ8B2403259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9b39160dfef603756bec7dd14cfe74219db225f9d8377d6384d126385fe2ad. 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/INN242429372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fdb2581fc1d41408f38f5a0dfd2922e7a2c8cb07d9d0297f1798345a30a09b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZEB2401363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33cd9783d0e5adf852c6a7ac9c0d82ea4b1d400b81affc90b8cf34e804ec28a. 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/QZZEB2486313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c1f7d048b7f509467ae2f270345162ad5621504a57ce9996efa3188886d151. 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/INA7Z2308789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd3870df9f24dd66030188f9f8544eca4156a0f19604dd93d76473cf4ba8ad9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/EGA252506496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71c75fe2ba05bdbb3ca3fdd58bd71f948d3b850135788834a5b2fbde8b6cc6a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:25Z), 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/USHM92505849.