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 0xa4363027e024d9af4f7bb15be0770fcb62821cd2e20976e384d783151b1a1779. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5987e24-599c-40f3-b1d1-5713b28c712d.json and https://artists.proofprofile.net/proofs/artist/b5987e24-599c-40f3-b1d1-5713b28c712d.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 0x92c0c593093ea4541998b832575cc0290412ac2efa760e678a0be2dce93d135f. 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/FR6V81758488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe67f79ee2617ec391ab5ca50e0c3dc2e66de611a780530b3ee79aa78ea294fe. 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/FR33T2112606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd09926f68e992c0f2ec1d84d4da998c080f0d2db74b88f5513ac922aeb79cb. 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/FR33T2112607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c6af2e2fceac2d32058732a13e4405bde4cb63d23055d44f397ce776a86aa8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:34Z), 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/FR33T2112601.
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 0x1a0ad59321f0ca13203ae89fd65d5c8835591573cd4277e6e5dd4d69704b318f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR33T2112602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac851bd62698cc52c00650299e9828fbff8c7cff5d1ece5541d8f00b8516d86. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR33T2112603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bf19d4da1cf4cd32518f8f1e6f46ffcf5a9e755cb4cc38b4c4dca78b1d2722. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR33T2112604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343741bc7a45692402931ebdabf745483f5d5a821c5c2526d64b9884ab079c2d. 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/FR33T2112605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc247ac6dff3a1fca9675b667d50deced5f00f1ee098f001fcfcdfb6bbc5d9b8. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR33T2112608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8280b5f247ad3818abf7c7017203b986c0ddc9df24d52bae4b80c0da17ee52f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR33T2112609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab20a7d35cfab51723bf8607169ac55e614e3c9141282f760a921264a4df635. 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/FR33T1182603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3438b424b54914c9869743f6c76738eeac6224a0dcf6f3e2067c3fa0b202c8. 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/FR33T1182605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7f1b3792e95a2f6f401e525ae6ddc030fb96754bd8f74d89e098fe144499b8. 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/FR33T1182606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8527f46478ba3a10212438ccee5d434b36d030f37a05e9f0ed6f3454481ef13. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR33T1182601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405e585d125378096fd6bdb785f0ff93a7f05bded3c6a142451dafb1e21bd5c8. 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/FR33T1182602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e9118cf04c4e570ec92f88baf2bb284e28300265e26577417e55d3cc61a26. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR33T1182604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc2501eec6a28bab2a4e1c9d4bfa5945b33767b83b10ac123e1a523bfca893c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR33T1182608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7db35aaa679519f12092e473abf1d1cd97a5514af83b1158619609351fcfc05. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/FR6V81461534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3491dffc5a3e555aa616388a8abc60ff36e8c438c236935850a732adaaff8570. 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/FR6V81461561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993fbdba3e4bcc75e5ed7628809cefad4a9ed21a666c153c645f72757a5ee8a3. 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/FR6V81461565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337f216986f53044409fed29d9dc4de8e8a3a84d6dfdc38faade16c9611c897. 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/FR6V81461569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e9efe12708fe46cceab37fd957a185bd5bec512971addcfc9e719d872cd00. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR6V81461559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8f047013a6e80fcc340c3383673f0ad4d5f4fae6066eb21cf7ed3d509cd538. 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/FR6V81461563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07df45998fa53e6dfe27f092753d22cc719546ca0c1831ed259a6a1482e53088. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR6V81461567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5511c7055ded5b1a3ebff5278e429fec7cff38ef6fcb3c5814e1b1d6df29e9fd. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR6V81461568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e736debe8168aff794f83347b95e097cb5f3a49c4f9d1f0ab6d78edc8e66842. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR6V81461570.