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 0x96d50960a921e5c7d288892232d293a9dfa09eddcde1163c50d67c7da15cc504. 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/f46d2b2c-053d-4f63-b85d-46e9704768f4.json and https://artists.proofprofile.net/proofs/artist/f46d2b2c-053d-4f63-b85d-46e9704768f4.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 0xc1961c44f55967cb497d9c03b885827743da0f33b7fd25a30bb459e2639d0f4f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:41Z), 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/GXD7V2205102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08df2fadfa24f1f5adcc9959dd0cfd4b4de29cf63275966197351b3a8655b42. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GXD7V2210779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e3db0aed4cadc7d8bbf69de03298ba0d4f8a1d1b6529fe47fe110c8a15d1c8. 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/GXD7V2204046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd620480a83ae121ae3cec91d952ade08260bdcb83b29254b2b753caa834796ee. 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/GXD7V2276302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3bc7f1603e327394154024a2507b41c6a0dedb1bff40fd6c6661db066034a5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:11Z), 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/GXD7V2281202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd07ac72c823f93c8ae626c4e10f443f6a95c64bdbdb0fb7555c590f2f3e90a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GXD7V2471529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7731918b6c44268057fb9d85bdf01b01888f99f4914a30283e7df44800086d80. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:33Z), 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/GXBAV2588548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683a2d518da96f953f14f426696f17cbcebfb251d8f3622ce66662fb7859c88d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:18Z), 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/GXBAV2578421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd491ed4a5fcc9acbe2003424f45a14d761867baa2999421939bc7cdb1aa3a02a. 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/GXBAV2501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a41793e2c33be557fb2753ac20e30905bffdd4d32f3c6b6852522157ef90e45. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GXBAV2595155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcd9e78e478ca565269efb52e553e9268e2da88dc27d18f5993f76744690131. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GXBAV2557515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8fffb7d3ac339b9f9aee664aea333d580bf559fafc4ac346cc766d741f42c4. 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/GXBAV2526069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2be8cca9ad7e741d011b7729b4d461f61ff6a2b5987c0f4bff5c9bf18d831c7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:50:52Z), 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/GXBAV2539990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa152ab74707e162d5e09dfb530266603f791857159fc1930caa2c0ade9e581d4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GXBAV2534223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af2376bebb5fe659feaeb7acbbd9a1333a29752b155debdbea3c632eac94d62. 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/GXBAV2543822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8c20eda1c714ff06a2c64bd78fd0ba14ee268fc89404f33b445bed9de0d16. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:08Z), 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/GXBAV2523789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9d76979ffb81befe4f678d1c123f37034acf90e73196ac1e0e1d418597cc21. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GXBAV2541172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c7ad2805cdbb6b682a60c1f73802ae493efee801b9d6061ec762704203db62. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GXBAV2553310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbbc8296a52b1350ec2501f4d56e8a5ac9f77f01b4ebb578b50fc3b5589824d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXBAV2585827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677d58783a531a703c82ab0afa6187ab090dedf1f822f03d10573b25f5b4fa2b. 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/GXBAV2565959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f1ee12b046622ce5ce2b907e0a5bedc0b9ae7ac968c82e05013734c2e36e06. 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/GXBAV2586131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea90026178bd2548829cf30356d66ab47dda005273d59f5c09ff8468aeecbda. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GXBAV2573207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf546b2ef01805db6046d8634841bd0fed31ba27d06343e5c95face56fbc3a3fb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:27:47Z), 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/GXBAV2554759.