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 0x31349868f99c0776879acf7c2b598df35a71c1777717db2a03b0f9d512353e1a. 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/ff18d6fe-99e3-4f96-a894-d3ca868261c5.json and https://artists.proofprofile.net/proofs/artist/ff18d6fe-99e3-4f96-a894-d3ca868261c5.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 0xa1df0bcce58c96cba438bbc314ae96603d141e4b1a8689f3549d2bf5cdbe92f0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:34Z), 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/DEAS80900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21fdb6c0a103e36dc00fc4bd065ae78d7592aac12e971ca6bab9146575d08b8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAS80900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb995ab203dd492a5217924913aeb32eedc1e02cb1ae3fe3cd33a8fe8d5697aba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEAS80900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3569b1c63cf7e5885d3e55f0fa69c5807a013d1edb805722f57c33eaa690798. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEAS80900236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20fa17ee23aa8882ca46d7a55867240f2a748861b1374fc30549e4844922725. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEAS80900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c3e3246a9f05f9183d87a199b2df59683b531fc3f8a1b599c348a581b3b0dc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEAS81700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb36a805f061c33982d7496d79317dddc3409d7f77b3e0d6de3496d8f17f5e. 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/DEAS81700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b9fc0b89db330d7e4198bb1119ea37a8627d9c6b3ca02e0a896d13341c1d4d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEAS81700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad97bd02010c13dcc55b85cbc3a206eeb83fed748db8cd405dfe2b88d609a8c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEAS81700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed03a83fd8f3183a2a908f33baab4b1611267c4fa431590dcece6ac97c971560. 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/DEAS81700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf23ee0e266ecb851f09d5513657b7dd04a0c2d22885b02d093919653db5b67a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DEAS82000261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe839995c7fa7b932281dee23ba45ed9415756e44620b4247ee86bc2497c8e845. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEAS82000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fcbeaeef1a754d63153e42e388a305b6fa1714a554d6adfc7c9cf840fd4708. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEAS82000331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c81393446beee0e97f8c2b70da3f8b52bc0518b6bc3e683e981c4f6010c18d. 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/DEAS82000562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff7b281b63f5ef5007b48f4a22b0fac97ed02843cc299b6ce8678c813e5b1c. 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/DEAS82000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018db8d6b5ce11b75bff7675571adeee43b33e0fbd15e86911f308c5b5c88059. 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/DEAS81000291.
Candle Lounge, Vol. 1 (Compiled by Henri Kohn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54049b62d036da4971c6736429d7a44ffc6767b6b5228ab4f9d5ce1bb7f8310a. 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/DEAS81000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9483e7e1f1853e420a183f5a9b17c60447457131a85980f74137865f9b67053f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEAS80900259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c377c863f80fccbf6e680592141fc206a582afa20567535261c6e25ef98e28. 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/DEAS81500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa9b936d183067cd84646e692900089f358bb18561412586e4b9d83effeb67. 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/DEAS81700118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210fdbdcf60e63b0be5137501223203ebef0a0f9e6653ffafa399c5514dcd0b. 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/DEAS81400134.
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 0xdada134e2ff01fc1c834a76e312de51ad2c814a3a7ac7f1bd4a59925842f6e01. 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/DEAS81400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a232bb0aaae433b9888a9172a5197ce259abb2d7b9614ac2c413bbb8745c3f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEAS81500039.
Candle Lounge, Vol. 3 (Compiled & Mixed by Henri Kohn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee19557fe884be83ae1ce95e1d7b136a129781ff986c8f4f7902f77459555105. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEAS81300017.