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 0x3be85f09c1fcf61c50890501f941f4af3c9cd8b9ec942ae409611f80dd537d1b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a579bd14-7304-4ac5-96dc-21457af769a6.json and https://artists.proofprofile.net/proofs/artist/a579bd14-7304-4ac5-96dc-21457af769a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3d05f914dd310bf51c0389d79632836c167e49448b572b932953da5fb9910bf5. 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/NLH212300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6991923e6bbf620a7001c354a2d05d88fd3ab878fbfc13cae85ad0ba787ecf2. 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/NLH212300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70685da6273b831a6646b75bd4ca636b7dc5ec8c36ec6a7a1bd18ab3ca71813. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/NLH212300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4f63b70ff9e7a3d2261515a74615a6d039d6f10bee52bdff8296513420935b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NLH212300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac16860f2b6a176778293480b54371eee3fb9b41dc203460fff5f9eca094bcef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLH212300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc1876aa80da1678a9f3ef0fb824768838ae45ced20033f755fdf6affc469aa. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/NLH212300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566bc72b303d5f1b899e8a4b5b6d68d834e4ddf31f85c5ac2a209c507b7deac2. 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/BRH6R2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959fa774f1fbe15242e3c99cec67af47a16a2007ce90d52d64ae9bcd55163011. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRH6R2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2f5d0f76636a02b2077c4be50d6639a1d13f01fe82bdebf0fb6f3c5ac0fee3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJY2516026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150b55df49e302a436e6b27b52e11f702b0a6ceef682525ae84b4a1c3509658b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:44Z), 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/QZNJY2516027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6685b72e935b9c6f2141249ccb74b223445bc36ad0cbd216eff478718a57f66. 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/QZNJY2516028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fdfdabb75d35ae3c6af241bbe8075787fed77a870cc2f934046d8ce1b29a9a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJY2516029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bd32bbd72186316b0a93853856a7a85dd148c25c94449c4c38c85d2b088b68. 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/QZNJY2516030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6604ba0b8c6a601390b08d8d703cf32887d1e480f356b98e83bd58028117e8. 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/QZNJY2516031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ef06d3c8ffdd8078b2c29c6bea85c27bd8a5bc591b8fbb13cd12986ff827ee. 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/BR7JX2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e4cac5cbc94a417f19bad0d11f1cd24d0b2501087f40fd524912825a598164. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92485684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c1eadf65c7de6b22e064b38906aa863f59dc40c077aac7e9dd32fc1f68b798. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCGTP2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9809ff77fc39507cd2b69b7181b49cbc146798db3cd065cc75c31345517c2107. 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/BRLQ42400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4848fefcffbd5f7b0480f85e9f9fdb2324098b5505559d5085f14c8d6388dcd. 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/BRLQ42400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe668f4193d9c21bdb9d44af6a1193fb6dc76317754e7d8089b203d125a329050. 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/BRLQ42400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd083a1ccc3e3f8dc5b6b39bddbb408a678b036dc95b20fde71658b5b150a89. 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/BRLQ42400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ac3b7267c967ca503fe6b072c27962fa53f4a96eadd2f35ebbc5889d4b75fb. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BRLQ42400004.
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 0xb52bb1e3f0b72f74b6b0834d0a1f7972767d499409ab0afb57a27b90da3f6c48. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BRLQ42400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d8b430e6773356644debfe18a303aef1f79919d11c7850a4775a69f7d75d7e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRLQ42400008.