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 0xe9d378c16d15752ce15883d9f4c05aa7aa83853b626a8170096ce4ef3ec84929. 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/ae657edf-afa6-40a3-b6ae-da7bf4e25af7.json and https://artists.proofprofile.net/proofs/artist/ae657edf-afa6-40a3-b6ae-da7bf4e25af7.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 0xb6e973a01a41580320d7092fdcf502fc29372ebf1da86de9f5f1314314cd1cc4. 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/QM2PV1827804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6661c2fa872f7f5cfa533b99817e0ac56453c6a8298bcb6d51fecfe0b1e5ea85. 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/QZFZ32017621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee2e7ac312bbf0268499d5f0ee7c7d7f40d65b47306618155fe3f4db4254f8f. 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/SE5752443260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dbaace26d580131f0603dfcc1e369be2ee104eb7a8f7b4411850efc235c9ef. 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/QZS7J2421654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25c4097c3506ef3eaa9acb2197b8c021a594d941282c5270a46d4a66c34dbb0. 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/QZS7J2387566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3aee814bc64947fd4d406ae79e32ff2aec495252237bbd58556476e3298b6e. 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/QZQAY2389483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c14c3b573f7a4684aac50f0b8e6df10c1369fcf274f69c76c6885c841f8c8a4. 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/QM42K2287666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906899833d14b352114a01dce254ab974d657a3dc74314621a4ce4d8e7319208. 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/QZKDK2263455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27565fce2e4ef10313d03b12524d063793db822bc691bc37dda0bcfbf7b6885. 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/QZS7J2286217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13afffebb79e79e0e94d8879bfe25d6d835041e335d83fe36efa826b769b18ac. 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/QZQAY2263209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba8a654f851df18810d245f0cc32bf9aca7736fd56adafa81f327c1f01189a. 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/QZSYP2110506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3645613a76773c1396f73e573d477d1b2ad2614b3becc3459c8031b6118bab. 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/QZSYP2190350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d12a7e53e8d826303afc2ad60c7f3610341481df8397160c2a4a9522a117581. 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/QZS7J2138332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b9a909358ae0ed766889f69d037f144846c21ca92b6b82ccde197138baa8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2157199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa725624b9fa32f56e25e5de63a44273c00a238dc1f87c16a58e37626fa7f4f30. 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/SE6QE2147530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ca136145d7e14d7d480b43180c72970e68ce44a8874c592ac7c37c9da67a11. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6QE2147531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae2daf9cab387c0784b0f6b166039e0206034effcbc82dd124e5909c536c719. 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/QZNWR2093996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1c29d5e5c1a60b76d88cb5aa350a90749b1d1f1232e723c8a184851c20805. 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/QZES82022995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f4dd7189ee4171db28544cf530323ee4b24498febc6c35e53e45d89e1d0079. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES82198998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423ed8b302d8ecbdca8ec310451e784f7182ed4452de73d956441a31d9884f39. 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/QZHN72081006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794f3357bad67755c7185bc250a3c8ee1c8bcb51c6bf2095bc0bb65868a83eb8. 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/QZDA72146840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba053e163968aac61f08dac59d4dccb61e60635ca7a1f0f3431fb2badbbb878. 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/QZK6N2015582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faec1e8c94bcc1a14b5f62f01534d68f45c92fdd4711002b00b0f1173b99d4d. 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/QZHN41955581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6055315c28b0e992d220907320302ab8277fcc5003991a39dbb78dc49aac3e43. 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/QZMEN2079016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aed99a41f2781f1b0e168d337a4e21112b0b38a9b5573f1ddf19fa9b0c66b2. 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/QZMEN2079015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6166ce2effc6de4d5f0bb875f53241b52296d380d0b57542950e1af97bbe76. 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/QZMEN2079014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b29ab80d14cdf7ba740fabd99228246f43d1b4917e7e1570d3c833f0638fe3. 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/QZMEN2079013.