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 0x9fdde67aa27791ecea07bce7bfe3f3e248eb7a939c08f80f2be9ae92aadadbba. 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/3bd7f414-0da9-43ce-9dec-495d93d0b5b8.json and https://artists.proofprofile.net/proofs/artist/3bd7f414-0da9-43ce-9dec-495d93d0b5b8.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 0xce41e7220b48e6a0cc395a884b9d934310f134be2e693594907ad4a3f6a85b39. 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/UKZGC2402666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d108763698a9b230bc5df8f08331d625eabdb8b5469e3e9200b03cf299cb0d0. 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/UKZGC2402667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185a389f63fe9e3e34acf5acb305c3e37371de8f96ee1f1f6a55427aba917790. 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/UKZGC2402668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bbad66792104322365b847c8e9dba2b1e80d2306544c753ed14bf998307e40. 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/UKZGC2402669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1889a45deb03986d054307ea25f6d171b6204a5a72d73404adedce37e1312ee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2402670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b59a186312fd0d83a2263eeaf156d2230df59e5a9e72b0cb6a6276d79d0a995. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2404593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5aad72df57f158b734ec8867e56ac7b672759eb0825defe5390cd7ddd6514d. 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/UKZGC2404596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51336553cace7f649c0255c365cde9cf11e2d432b4ef2be2375650a2705bd3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2404594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec394af6d83341df445fbaa990f2e3a389914507184462d9f496c360dd9da0ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2404595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c97f5e784b65449846ebea28bdb0b8eef8f98bf0d6932aaf26671d068d4fceb. 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/UKZGC2301811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10494cfa1c60f23881865575813d234f597be5d21acd60b7b29f96b35e47488a. 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/QZN882133345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2c0e56706b326bc74405ac688b70be1cab0490795a18077f6dec1361994ec2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2200545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c97f5e784b65449846ebea28bdb0b8eef8f98bf0d6932aaf26671d068d4fceb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2301811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd3a265aab33b7a47d1905f1dba30dab7547035f27baba3546c1acb9c3e4d0c. 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/QZTBB2222710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce41e7220b48e6a0cc395a884b9d934310f134be2e693594907ad4a3f6a85b39. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2402666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bbad66792104322365b847c8e9dba2b1e80d2306544c753ed14bf998307e40. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/UKZGC2402669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5aad72df57f158b734ec8867e56ac7b672759eb0825defe5390cd7ddd6514d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2404596.