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 0xd3e8f18238d0ef538e9bf6d8dee650eb5fda60ce8c5c4f8c6df00796dd5b6976. 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/db52dd72-b870-4221-9a2d-1fab9352822e.json and https://artists.proofprofile.net/proofs/artist/db52dd72-b870-4221-9a2d-1fab9352822e.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 0x6b8dfd1062db8b7acc6ddce0bc9111d8509680a4da5d1fcee0ceb399c966db82. 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/MYUM71501225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aabf2b1ac2d35c94faa1a63ac3c614d804c3c5e11adb19da3e7ca8e737196dd. 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/MYUM71501226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bcd23017d2b053619f8f44b0985b06ea9fc3e88b2fab2bb370d24ddf2380f. 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/MYEM18700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda785de0205f1cd1f37f92fd292f87390a6580b86ab020d9db7d152d90f94745. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MYUM71501229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b563a721a8aff7e2e2f79b372651ec1d83f59022f3c4bf488d166badaedb924. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/MYEM18700010.
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 0x8e3bd0aaf557bf912f007b9b0e35356cba995e3de3313b7f898ebd99f218beb0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/MYEM18700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e90bdba5e20d657aafcc0d3a315843fd0ffdb6203d646470fd655e4b7b3fd66. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/MYUM71501227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bffbe6c228d48fccbf9d7d835e3e65b36ce63f945df7801bef435579dcfeee. 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/MYEM18700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c62b05bf6995e4eced28ecb4be4915c954d2033847acf3ac3f40679cad02cfc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYUM71501228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb25310f1728a844a4389ccfec072bdcbb067a41e6eb16176a156b9ded3e55c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/MYEM18700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd5c70e4c7facd15fb91d0b889e5675c2ec9ac963c2a098075f337d678ab2bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MYEM18700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf75a51ce7d319925a9c8099adb142a0c3b0cd61285a3d83261887ef09052ca2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MYEM18700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c40d5f6d2d628d02e1ffdf85274fe59e616d61fbd979e2215d6341212c7848. 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/MYEM18700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70f37ddc5807e3ec25263bfa8c6f1014ecd02ee01671942b0d6e1ab88616ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MYEM18700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe271e998825b8a94ad3865b4616c487966fe13fc0b20e70726076edc91dd330a. 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/MYEM18700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8943ad725a3d16ace1be164c5d23d1818e47d76528effc2c3388204d31c213b0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/MYEM18700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939cec08896abea57330c6c9defc26f4e06e73b059ef836fa052cb0b79d72d24. 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/MYEM18700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b540a7f342cd35be54d6d4c3266fe85c04cb7d7b848f3b628d98dd7143c4a0. 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/MYEM18700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefba877509b33e55d0004cd02ebb778bef08b30cf4982877ccfb935a60cd91ee. 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/MYEM18700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81e2ace99b64e277ba373e1cab6ebbd11cb0b352e37cf1d54c9c219634840a7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/MYEM18700009.