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 0x39276553fdf9477f0db1124a1a598e8ecdefa6a2077ecbdbd19425d184b87a48. 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/413aa45f-ce80-4ca9-b1fa-52acfd350531.json and https://artists.proofprofile.net/proofs/artist/413aa45f-ce80-4ca9-b1fa-52acfd350531.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 0x6c0a88f5de2bb5899f7d3857e410333b7aca77cd5c70648b81635231247e9db6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZMEM2246014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c848024d6ac63e29b321af427d405390fd4400be91c880ef388a7134c219099. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEM2246015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97679f4a2236b325ad108f18bca008c2c6929007bb7d6a32869cc2dbf3d3be7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEM2246016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88edaee800cc854fcdd490dc5edfcb623854f61f5088ebc7af326dc3255052d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMEM2246017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a64ca12d1d4d1775ed4330b8f78eb35e069c4b9df94b4109eab458eec461a39. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMEM2246018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52473817dd39390ca9acab5fbae26cd63a044ecba06e3a49f3e113083ed9bb2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEM2246019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2696f9ae8c2934d0ca650872f750a56cf74f3749a1e69a898aeb4e621c67b4a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMEM2246020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6497051a0189b78b00959536aed78dd7496fe918a8cafae75b1cd72b179fc3e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZMEM2246021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b345cf705a42a3e1d32da16567219dac304194218431d8bf8be361445ebd115. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6Q2393241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa411c567079dd64e7fbc2ff44257b1394f68273a5be2848da1aa46d68a3e915e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZK6Q2393243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76fcb5e966b1dc7db2b1528649c9d64d50710fd819ae160a38d9f813a7862f5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6Q2393244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2539ba930d90016e25a46e83a7dbca0319afb9e060be37125118f9ee285e6a4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6Q2393245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6def860daef9b923a03507ea73cdc70efa8fc56418b79d8d6bc46b44d3a5de. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6Q2393246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c698b760bae94bb607979c8839e5ccb328186c67ddf6fca7182aa759a78937e. 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/QZK6Q2393247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf464492b281368df3dd3665ee642d9d03b345cb0f7f8f6121e2756a64b00d5de. 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/QZK6Q2393248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4f032b7fc4ebb4d7ab3a93c1385b21f0b206aa3f647bdde1a7b382ae09b298. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6Q2393249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d3d038ff922ebd7e0c1c39d28c946126ba5781c32924e0b1e2fef196c36f15. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFV2485324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d02d13bf882c95f68b5b00cc43353df0e5cb1b0fb092079d018fd12635f68. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWFV2485326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3753a0ce55705f963ee1e8a32e2236043a9150c46acbe05763fce23f1296b7. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZWFV2485327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea83ef11e32310a0bd42a38d901cd64d9d0f829817b9202e10fcdc5993e636a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFV2485328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff287c9cf262e8397825625989487c69f980279b26c56963c3c4aa5be69d5bc2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFV2485329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c3ede16e4ae9ef941719cf5a8f6605fe3d03c1c4d353466ede31f9c43010e. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWFV2485330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d9ef9549f2f49961855b22e56a8f55114786fe4478bf4462452f9a926e0548. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFV2485331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240ed8c0773dfdac9b85b2b072951fd69f460b16caec86f4c01be05bec10ec54. 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/QZWFV2485332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2065d3828fed86cebaa8da1ccb29c4670e961318d340abdb84bec04a2d05e83. 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/QZDA82526498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09fcf1220650deb4db3f95cba99cb53c48bc3dc894eabf665435b6cdaafb7c. 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/QZDA82526499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3daccda5eeac80e25b7caeab2e35eeb19b01b685519fea37bde808f8b9754c. 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/QZDA82526500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa245f2baaeda3e6578ecbd8d320d5948a249b5f999d1cd8adb3dff5635a1b355. 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/QZDA82526502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8674bb9dcd9d5dc32d8dc086578d1a09dc9c9dc0f4ef5357e31f911ad4974b8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZDA82526503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0945bbb869be2719822a5c9015a7d5ca4aef798ad5cdde24ae88309c10e3ede0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82526504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74bdd8610bdc5816930c588c3aea040ad82c707b0bd1256262968c81f0062a0. 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/QZDA82526505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe270dfc726cd5f35ac1aac5f6a9f1dd37a5e0dabf5c43471fc40687061944fa3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82526507.