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 0x6d2ecdb97a8121ff9fef0ee6628cdc5d3d7235532514f54540d0a9f71b874232. 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/facbccb7-e9a5-4947-ace7-ba464fbf6d99.json and https://artists.proofprofile.net/proofs/artist/facbccb7-e9a5-4947-ace7-ba464fbf6d99.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 0x283844385fa6f421b44f3edef5f07208f66a7830377f38eec77678db02be1963. 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/QZNWW2418062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7843ffdfc97b36d889f9282c64569a284d1cde66505075b651b466646400f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWW2418063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadca072c0f3399a68e63ce24f6a3e32b1adc809cceb1824712ac0e4c192773df. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZNWW2418064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4ee42776bd4a21653b9e99c16bc5815312d4dbcbbba7cb2a2d40bed7d79aee. 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/QZNWW2418065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa8d1252e60bd772325d97b623a05b4a50345133b6f41a5162f67162472d6d6. 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/QZNWW2418066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdfcfc3c1559b7ac678be693ec9c719b52a769ce4af97ce3b998d94071c123e. 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/QZNWW2418067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d96f778ca700bdbf91fdc16dd5d2d37910766bf7d770ac557edf11d9da4b5fa. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:41:45Z), 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/QZWFJ2469819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3a3ae049540abd6bfdf5ebf8e52c84e6f6fe383a68ff1056432f90ed8349cb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:07Z), 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/QZHN62595237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b46ef72949954dce26bfa89d938902435ef19a0f47ca0e99bd8914ff0b414. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:42:56Z), 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/QZHN62595238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287f62194a25154668bcb2ffd4d2d367ac9ac2fe5d854561f7b17de980f6e529. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:09Z), 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/QZHN62595239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e1851970bbc05441a02e45dbb952fb23ab2878bce7ffa03fa69d1c2419c8fe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN62595243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd485a5876b3ca9754bdb5ecc21e5c6d99eb68bcbb9ba2211d9933a77f0f1262a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN62595244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e732d6533de22d0000856e7a6d5090c3524d8fd835a0eab679f5bbad9e6ca2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:04:00Z), 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/QZHN62595245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0bda638325d9c27ee039df85779d6947ab02084224d25133389d3bf11cb7ae. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN62595246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52649a5c1ecb67f3ce821736a4d31a5833fe8ee8b41e159d7a347aeaf01052d0. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZHN62595247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf216df2a8e286e2474f1e911b3392190490fa2e2cf15dd306df97e67553e11c8. 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/QZHN62595248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d54c6cec1a19cfede773657e03b468971e0c2623ccef79eac3673cc0c3ebf3. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZHN62595249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f8e5b7f8c4234a2d7c657b1c53d4cfa09bf0bf3064408ae4c95f63358f70d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:51Z), 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/QZHN62595250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b00e7f376f22be0b5c1438d40941805c54a9ddacd1cdb32d764fea0f8e0cbd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN62595251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b23b2d3872982d10e88da81b025b64d82d8794b849bc54c535c9d732c19985e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:09:08Z), 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/QZWFU2505243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4471b23c58cac616302f1e98442631892d46d4315b7a82fb11ca8cb9f33371. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:50:12Z), 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/QT6EG2567138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa902e82191428c8f34256bcfec4f24d9f4708c6cfbafbd7d2ffc7d86a53dcc2. 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/QZNWV2580263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1914a8625c3d5429b4e53eac35250c0474a31142edd2910209061c3ef5da17. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN52363150.
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 0xabb449803bd5a567521e773709efa71d7d6b0da795387ba15dfd4a2b2d6a9efd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZK6P2195604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c28b31d398a4df3eeb7df49fba9f1753404bcd0f9d04e02d17db8b958c48220. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNWV2580258.