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 0x1df04f4e1129d6a92d3ac81fc60465170fe597e5f9a1403da4a1ddae50f6af41. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d8dafb5-cd53-4ee5-bedc-199e280f86d0.json and https://artists.proofprofile.net/proofs/artist/8d8dafb5-cd53-4ee5-bedc-199e280f86d0.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 0x37092d7216a4246839733b849a10b9b3c5088aa65d4c1c3ff8b4e7153acc6961. 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/QZNWS2065877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87471e3d72389aa955ecb55010aecf196228eb7b06669834038617187b59c4e1. 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/QZNWS2065879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed5308d832a54c0e649672be4358f2f2ff68dca61ab4cfbe2ec5f0d1f95a33a. 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/QZNWS2065880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0daab6337d4b61ca59c7c13250973a1abef3fe93e2e01ef34c77348346045e2. 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/QZNWS2065876.
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 0x219a653f9f15bfb90d511f8e8a287054da54128780e3b5c4eb2952f6ecb5b4a1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZNWS2065878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e33f53c9a19000f4d68fedf491d94fc057c81425f56f6d376d495cae90ea75. 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/ITOGB2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6060cd28008ea6cd73de5b794c38fc928ecfe9daf402f7587e93c5b1080b3. 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/ITOGB2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc0b2ce1e90a535611aa8a2476ac3fcbef84e7f74a15c961c8954a4bb3dc59. 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/ITOGB2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15493eda983fdb7c35063e28ae9fdcc8f990fcb5b5f196effd60bb437aeb97dd. 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/ITOGB2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5311deae38094679449950d26a5b71bf7b4055e3bc81c68e26d360155309b21e. 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/ITOGB2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776096ee90caf98a849dbd40e2d1c290d97c28f063685118ab7d7aa91cd59e91. 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/ITOGB2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a09ae104965316fa89886fa6e276b5361fb09ea72cd49469257e05db93fb03. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITOGB2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac1551c6c97fc02720ff4eeecadf357787d3778c031ee86e8cb254d6774db90. 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/ITOGB2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49be4556c88ac507aff66d518997123ca7c9775eb134fdd9a2a96d094e0b823. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITOGB2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf583063f301f603f89714a0832f61dcd8171b45c7441ccbf3488ed2c85b7ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITOGB2500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1d90b8bef3d3229cb38bb0b56d2780c34ca48299b9b9ad393b3cac09b67dc6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITOGB2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac2f678f9e5581500baf053e6f9e4d9bae181dcc0766eb54d71e49cec021f22. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITOGB2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8557317a5666c1d7c3caff2674a0850f209841ef1eeac5043b32d0ebab74fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITOGB2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edad699c1957aa2fdc4c8bc571fb11b678881f6feb7d0492b4fa47d5c1d39fe. 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/ITOGB2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383c99178f582daad722d1ebea778d493eb14fffcbd94c45e26ad9c94005e1d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITOGB2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66153443cab4ed45a885966903ef3105e66f3b93e5d8a901d167e05a156ec866. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITOGB2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6680560d4e11b62269e1dfc2d4bc7c66fd8620d52c686fa214d5f9c059b37b54. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITOGB2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8e27f7173aeeed7b8ec49f5662a16fe59239e8a2f016f5890af0e0bd7f8c30. 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/ITOGB2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae035a79b550df82354f2057be23b178dd06da72a62df862969915fd24a5808a. 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/ITOGB2500055.