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 0x82bd6716ab585643aa5851655a2e70bf24bb3350d3cde3cd3fea21bdff3c16b3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7673377-bdbd-41a5-8754-d7b9fcd6a5d8.json and https://artists.proofprofile.net/proofs/artist/d7673377-bdbd-41a5-8754-d7b9fcd6a5d8.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 0x2e94f293925495b972221d67896bae3503773126000d219fef2b83770d92fd9d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:19Z), 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/QZNJX2073637.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5814af07142d30a5c8bd162f780ff333b74687754d4f76988ab45b32751ab3b7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZEQU2114606.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1741b2aaedb204b6739203539375458a896c2b668a136a8dec512b6dd693415b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEQ2102698.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd143fd7a5cbb06bbaa12ab3e10e9a8556caeddb0ab16c30e7f7662a21045e0a7. 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/BXG6R2200810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc16ede21c97f6d0898837c56b62c69f0b2bd453ac5bf76f6066dceecbf6151e. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/BC8182300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd5c2b1ddc493ecc34361a01718323d6917c7f2e190772738b2b96384dded45. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/BC8182300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b99be1d6b90fdde70af44423afdfffd07646105345098e978918c47d00d03b. 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/QZNJW2315757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1481839fca011ada56486d422c619194665e467b805be8e10c78e6ac9a6f43. 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/QZTPX2346175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1b5870bc51298905404c552b07772b8acd1f541452c060c9af619157e1998a. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZHN92466881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21210c67b713992fab69993c59e5ece72ac6ffdf058af5d3b026af2707f47877. 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/QZTAX2488806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c1941423bc8de3adea61b048f8ae9ea8784a795123e00f154a119103921ec4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTB82479324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ea57969e4ad070fd96b30c368591cabdad350f1a7dcf91ee0b8263b930bd0. 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/QZTB82479325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c960178a17f6d764d967de314dc0c4ca2169a8b69bbb052ec5a70e99e1b8c37. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ8A2472983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d61fa1c851620e6c7ece22edc0f2aed8ddab163847184233f581dc3a418f6. 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/QZZ8A2473012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d15dd95024ad5d4ee083135947209929b2d16499f2917b1d5852e9b15fd585a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2577922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0019b4e7896e7859c1a2bb22b1e23e0f7c6c758deda58fa088d6a4932a04c8a6. 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/QZWDD2555245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee579ea894eb3b8ebb64704d5db7ab1b6884162df62e2b8d17e9e9718998dc1a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZEC2302329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0803c2d2c8f2ed70726b55814314cb5ec92c48fa37021776f1c77b16bee105. 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/BCE7P2400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b9eb486a4b84d5573322cc3db7e9d94c9951f59c486f6fc0f9259b88c38c28. 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/BC8182300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbfd863fd4754b40614e3e7f1e9fa645d6600e7d9864fdfb67c2657cbc1f8ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES47F2300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb835e683b2ac3133b04fc6ea1e4f1b2994d7e4630282c88e32997668fd4d46. 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/BXG6R2400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6236145cb8d830bf9f8d64d9bc1aee765edad7da22558e210b7f5fe0866b9235. 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/BCL2K2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd97bb93cb74b010435fa0363a46a69385afb3cb672c04db174c265e61583a. 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/BKP9L2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114fd1dc2323872e68d81c921f995ba96fee9458641387897d05aa25ab9a7dea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL8RL2453585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd97bb93cb74b010435fa0363a46a69385afb3cb672c04db174c265e61583a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKP9L2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef18d4fd4273202d8741bef87afe7961f5a33f38d38435094dc6d9a8bd3fe18. 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/BX0412500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a58ed5f0b71b93b1988803be46a79d3584f21e1401f4e5d1088df1008561ff. 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/BXG6R2300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e6f6abad5a40ca122bd5e49ae3575f6325d4d59111485bb9469b392ff15fd5. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZZ8B2499891.
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