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 0xb2fd2406957578b22ddfb65fc739a506352eb43f6310b34f9dd209bc0766acec. 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/2a34389b-a85e-4330-b980-8f26247cde44.json and https://artists.proofprofile.net/proofs/artist/2a34389b-a85e-4330-b980-8f26247cde44.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 0x2144540746ef6d87971301ee45995b7f6166464d44f565f0055779a3bcdf96c7. 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/TCADO1836268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd410f1b761e8b5682b156942d3f133a7900f2a707773e7e036d6d5afb6d5b4a4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IDUM71900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb06f46951185a33f73ec14ec014a96fe3950d260b7cb553651acd8f043b225. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IDUM71900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76d20e986e5216f9e6f5e1cb68261b6937681df5bf172d0a9647fbb10fa8ca9. 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/IDUM72000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b547f2513368ab52532299a54766aab69b0a73f7ebf610b171c355f4de32a3. 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/IDUM72000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0610c40acb01dee5dfbc6a62606f3bba01c635e715c593a35dcafa46ca85d0af. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/IDUM72000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955031967f2343bd0fde0439d1cbdbb994252922bfac241928ba7a9a71700574. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IDUM72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2e1b48756310ed5e82ad1a5481e4751b42723f030f63c4e785fafa3b77b1ae. 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/IDUM72000016.
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 0xeff613331844548621a2c14ee7d8513b8bec3d5a8866dac6ecc1bd45ea1a4382. 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/IDUM72000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d01e0475c25e02fee31501d2b66a0f686ebdd22fa87ae1594ef16d75656449. 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/IDUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501d5bbc37671d49e38bb2acbb88584fa37a7f5c9a8d9a22b672856120345a93. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/IDUM72100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983f6a86c1b4d9e20e2c36d49b73989218cfa4a6010c39ce78b3785f0ee2a956. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MYUM72100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9819952b6c3a7a7cebb9ae78950f252a836cc981c84d94379337707cec0a86d5. 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/IDUM72300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9819952b6c3a7a7cebb9ae78950f252a836cc981c84d94379337707cec0a86d5. 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/IDUM72300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9310f3eee7f90a0c28fb9edcc0015bc371b46d1ec15109573ea3ef44b227ed. 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/IDUM72400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22086f179bfca76545e4bd195d8494ea04ee8325d4e4f957974eb92d453fcd40. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IDUM72500278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36082d06997985e38830c17f2483b656d649d4f8ea0c36f6749330c79700a055. 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/QZHNB2220639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cb1905cdc59bf8c3677fc004b0aa867473e80f92940cd0ae647a8fd3deba11. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRS182072186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8477e2173f1f31005b625d3067fc9175aa89d24d8f3918e023a66782f790d808. 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/FR2X41928998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9f2fbc9b640e59058b38326a8cd9fc5dc37fb9d11ee2fc7ad3084b06f67fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDUM72000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91f9c77238cc2ea5b0b866582121f6066b7e7faaba9cfee3b3306dd5f181212. 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/QZFZ52065819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf2dc403dc26597338bf151d0a89830fc554d014fff41be66cb5a88bd798458. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFZ52065820.