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 0x8e702acd37470084cef80ce934a4e9422c5b4cb36b7985cca97f66a601394244. 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/78a35f8f-a5eb-4a04-a9b5-cb89b470945b.json and https://artists.proofprofile.net/proofs/artist/78a35f8f-a5eb-4a04-a9b5-cb89b470945b.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 0xf23d8fea899e683f9b01773d044ade109bdbcf8047c905fd0fced6380b0988a5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTAY2265031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc37b7f0f222056c90ae122fed60c252a2487988e8c3af99006a0d0994ba65e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZDA72316254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c85b5cbac6c2c3a0b8dddd33139a0017d1c3a4cf1cb9a9263023695c44e3b9e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN72466941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c85b5cbac6c2c3a0b8dddd33139a0017d1c3a4cf1cb9a9263023695c44e3b9e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN72466941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd38dbfd057a95127ea23a5400f00dc418ba4fa7d019355ba29934e49791faf. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZNWV2486354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15e6da2c0a4f929043dd17d2249efa28cba700f12cd89f253eb1eaf629d5452. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWV2486355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c85b5cbac6c2c3a0b8dddd33139a0017d1c3a4cf1cb9a9263023695c44e3b9e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN72466941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6dd56eb5de4c803e372da904cf74f2b8592a561299d9b7c79f465355ce103c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZTB22412009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0d3afd57410e1f19cd654cb62976b077969c6a3e8381789cb5edc156e5a57. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFH2468756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9731235abe9e2d56f11cb69deea52832f1442b9442ea27c9a0a9c0380f26565. 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/QZK6L2558821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2282cff717242bb3f4cd41a7af252d7f6c2f824373bb98711e0358f8abefd36a. 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/QZK6L2558822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6dd56eb5de4c803e372da904cf74f2b8592a561299d9b7c79f465355ce103c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB22412009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7f344b6429033855ab710242c3323f25230fee465554fb6f4005bd5123e617. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6L2558823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cb72c0fff574482b3ce2182c8a0c7af59edd491a048a351a9d9dea2e6aa009. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFG2401769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0d3afd57410e1f19cd654cb62976b077969c6a3e8381789cb5edc156e5a57. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFH2468756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6e1f80c65829a0b142cf99858666d8dfe9ad7d883765a8b5275e3121960701. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6L2558826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea76b1e7b9805346049c9d5aa3fdbfc78a76f79e944e989daaea1fa1f1f24e70. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZK6L2558827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209c42464498901f25c7e49f3b9786f8a657744d75bc5533d764b33d3d390a8f. 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/QZK6L2558828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb636b618ce61b291f71ea37009e788a4133ac222d03e0668c8f5686e87efe2f3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTBD2541457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856294a46aaf6b5024614e050a547a0bc7c0ab34802ac626944d9df92a9a4584. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTBD2541458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec6809904c9092ee8379f38357e374cb4f07017aee07e0416b267c2b50d4c2c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZTBD2541459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927d451b731b64934502ee7cdc153fbfe797e6b30d92c3c74d1354feb0f74660. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZTBD2541460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c764bbd86d730cb121f0a9e9eb2e2d0967481bc2bc61de5de620a56231c5b4f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZRP42597602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaca586c0d803a796275902a44fb609be54624b7dde1ad5cda4ccdc29f17757. 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/QZTBD2541462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb796368f259712f3ab5e7588758569227a18e038ae378aac46f5fc5e2b9140. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTBD2541463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd165a8db8b824684342a5ee58bae60698ba312f8cbba80eba91af54f56a2907e. 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/QZTBD2541464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27b0fd25b046b3f2d10c01f26a9d23a118f0482ad2b1d1e4fbea8e8cc89bad. 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/QZTAU2575403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9dac9365bb4f549669665b9c6e096784afdf5d0089ddbb46ce25ae765a9c4c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTBD2541465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793e9ab2874a96b4011ee943802a81dea6d9366ccebd2ba0db163e49fd1b2e40. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTBD2541466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7b2a9c822d5d9788b5e3a41a431111c2631d58adc20266c8236e1855412da2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZTBD2541467.