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 0x6da93a74b89c9e1d8565e517c7a865f5a4cd51198d5ee2b82c4ece3c02def631. 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/d1664961-883a-45f8-82c5-89c99c2c627b.json and https://artists.proofprofile.net/proofs/artist/d1664961-883a-45f8-82c5-89c99c2c627b.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 0x6e532732d82d42025a78fc0a0f1b0a02c422ecf497970bfa74d22f7497cc3e72. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DGA082239274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cee68f35bca9facae85952b619b35d7f066ddbbfa7742c9617d2ca63f64aec. 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/DGA082239275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47011109071373db58ff78b40c44cdd258b52a585292e7fc918d29bfa64411a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082239276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f5079df6a518e618210abab686821f1c33a4226c6a87df11eeb36e06731e8. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DGA072289854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b9fdfe956d972e0b9702288b0b68cfbf4ecada26146ecedc102a28ba853ec3. 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/DGA062291199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3b393105ec6599ecf7273dfdf8d45429321269cd23334f9dae2adb0c630857. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082239277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fa3b0f79e0467596d67a64074bbbbb93f0ae37fbbfc7d965fc09e833c4de9d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082239278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d4c036592e15623b6ca455fae0b46cc29f3a5c7f84749dae069637c5903dfb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA082239279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e403d40abbeb94b8e9261ef172c42ba752ffb4d558cae12e2ec3d7871ba0455. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA082239280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f19e38d5aa30a5ad78ba92fa8dd1cf81e337753deda45ab07ed33ae0f806e3a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DGA082239281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ea9bfaaa8e711134acf9c151f8c1af2d7e54ac2099af9fffff47de6f308205. 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/DGA0Q2315334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633889529410ed03b037494422ec7ce91001b018a81597cf5b4c892bddcac294. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0Q2315335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de865957ca9daacb18c315607f4a7a6efe6ca7663e3199cb145d531a8db7c1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0Q2315336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9f2adcdfa01438898a66a07df5ff3bb2d99d2e877c06319f6dcbbcd7ff5315. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0L2373716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca60d4b516258ed6f31a9eb2e9813c93cde9e9c2f1d0d591682e1f5a933113a. 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/DGA0Q2315337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf9cf607b1a25340821966c4af33a5decc2a0586128787b07252898574947fd. 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/DGA0Q2315338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a6a3efa8b7a89c6785125b58f0b6869a50800f5a25d8b394a7bc5d9a83abdc. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DGA0Q2315339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780575eacf18362b4f8db3d6be929da379fec367327c8f9a0bcce23f6770d9e2. 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/DGA0Q2315340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89edc64fb6add1fd04ec107b2b1c2a9992069747b6bf5e0cac8929d86a72b71. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0Q2315341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231cb91b6e7cf84a6dbb482e65992a458875ccdba7c318669659fb022ab8bdd9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0Q2315342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c0a28d9035c28cfd0909c8837bbf8b421a5fd61ed9ffe8202b16c769a8689f. 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/DGA0Q2315343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb087808af98670fc51b72d91cdef268ed0a326ca52bc8d143873ca0214c87fcb. 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/DGA0Q2315344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8633841c87d727a889d6462f84257c28d5a287b1976ccf2ebad1bfd3c504165. 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/DGA062411876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9f2adcdfa01438898a66a07df5ff3bb2d99d2e877c06319f6dcbbcd7ff5315. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DGA0L2373716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b9fdfe956d972e0b9702288b0b68cfbf4ecada26146ecedc102a28ba853ec3. 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/DGA062291199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccc894bb7fecd052959a85c3e583dc86c8fea6381c1016cf3d3533e41376aaa. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USLD91730590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee9b9af5b5f54897869c7cfb10c41e890c6780de764530a929e43960df4bf06. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USLD91727034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b39da0a03094d5b71d05945d8528062fc52f78b61d82166eb19c7d8326ffeb0. 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/EEHU32000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c0eaf3a552ca920930fdd38cefcbcbb980c96cc157bf040a567df198e846e5. 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/EEHU32000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60a465b49ec0228e9ef7ff6d5aa8f74076f0e54ee62670de86f431012a3cb09. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/EEHU32000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3546af8525d2281f0ba5fa8369338eb054e0c231daf73c4cc419cb562fe9cd. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/EEHU32000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab67f5cfacd36fc4bb57b03eb22956afcfc25e16cece02cc7f2661cceb21baf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/EEHU32000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38431ca8db44ebfd4ad4c9b3bd6867135fcda647dcd32d847706926db18e7add. 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/USLD91721105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eea61ffaedf3723b2c96ed9c57adbd69886e6b215680f6d734f60c2c31c286c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ21989587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacabf6729b34687d74eb06be504d47c0e8440999d497b457ffa7eccea758e643. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USLD91730756.