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 0xe44175ce1fcf214e088be6e69b2e8c6849e9357179aa186319f3fdfa99a2c71a. 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/bae7a06a-689f-4c62-8308-df023eab4b67.json and https://artists.proofprofile.net/proofs/artist/bae7a06a-689f-4c62-8308-df023eab4b67.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 0xb49a2970294f31b5297c836e9140c33ccd76bc843818b14a315d61a05daa9383. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:34Z), 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/QMBZ92478577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c28981681d368d1742369ab40faa20f42ffecc4f6dad5c2494f698a4675e54. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:27:08Z), 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/QMBZ92478560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9110a3f081592238eea96e704014a852bd0a4d932305c16e5be383b6ea9547e. 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/QMBZ92478573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469ae87a4c4487d5fa6b79d245e2cc51030806e9552b477bafdbd3aedcde9f7. 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/QMBZ92478582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ef71748b502799fe9f5e177e50767a2e25a2e54434ba61bfd9cb47141cd37. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USSD10104739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394791dcf199e800f5db9d4452f46235e79a99c5861a063c73b74021eac640f5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:33:42Z), 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/USSD10104740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5630dd9dfd3f3a3de2a2d07c67b1ab8cf4a47906f5c9793679496e15cffbc34b. 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/USSD10304178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922793b61fcf1505bc21eb83975438830455757c44615f3e740636bccfd8c6f4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSD10304180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c71d1f378e0dcec63659a43388949faf7dec4471e5e0dca91d494c526c0e7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:19Z), 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/USSD10304181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c3adf1abb9506398fb0ba57fba3c00feefa6755b1190fdea211af4efe72cc9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:43:37Z), 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/USSD10304182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e53a47465b051f1a6889ba6de76d26c964ad038412cffe50dda07d53de9e7cd. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:42Z), 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/USSD10304184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9550b447d8c951884ae0c3c09da4932966d53d13151696ada1faff6317968c2b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USSD10304185.