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 0xc805da15fc61ed9db73a048fe5b44280a642a09e9710210276b48427fd2cb162. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7f0780c-fd2b-4542-b6a5-1ec12fd67227.json and https://artists.proofprofile.net/proofs/artist/a7f0780c-fd2b-4542-b6a5-1ec12fd67227.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 0x9b5ac444eb95b6af2e72ccc03d8d48d81e2a11ea2e012ff3a9c9435b36e915af. 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/BRDZ71300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb117c595287c9969a03084d450ef19e1cd83111046eb98632e159e0c8b0d4288. 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/BRDZ71300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5527791b8ab0d4ec9f5c87a58ee294fea1d5f535da656a8b2efdb3b6a8577a. 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/BRDZ71300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5127bb23c431b78cb1ca80a0efd19c33ffb7ce49efb7ef8402d438345ee4eb1e. 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/BRDZ71300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072a073afd1e4328286bbd594ff60f70afc27cbc1f5ce1acecda1487c832eb4b. 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/BRDZ71300003.
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 0xf8effcf2bd0c64a2e59e77b6068fbcaa085d022b1cce7d199f141e8d8c0e527f. 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/QZ5AB1848917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa143530bb98dd71efc812eed71f53a0daf833dcf318d115ae9ac6c243c32b7f6. 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/QZ5AB1848919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c1dd19c79e2ff41e1660bb8392a08d5793fb49cfa1c2e28a514011ec4406e8. 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/QZ5AB1848920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d806a7ead6954153480f136628a8d497aef2c441ce2c240b539b55442148a5. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZ5AB1848916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99aecf474f693424bda3369125f93b0a21cb27166d2af354a6a0b318d7a4b85. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ5AB1848918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e57f4088f78642a26305652a4e4efc47ba6cb3d31e7a77dbd80ed4e3f0b633. 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/QZ5AB1848921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b8c47bba0b3750cefbdf190eb10e8e54ecc0b27b58d28ae367664964fb9a3c. 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/QZ5AB1848901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd3ce815f4285cadf15ca6acd8ce8fc7d2263381bbb0f5e83208f1959cf694. 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/QZ5AB1848903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247c2b82f0075afcd09782ff7a8974b0cda32716c56b5adef23687866ed75660. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB1848907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d416eb71cee7855b6454fd1cb72a2f2f477c333e6c111a4e6131c4ab1b88e3. 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/QZ5AB1848908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb9247ac458960facb29fd9c3aad36f4492ed36eed84f9820021ad028b5d9dc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZ5AB1848896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4978d4fa323d531b7b716e9fcad00b6f15f07ad943ad5ae2feb4005e0447e61a. 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/QZ5AB1848897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf40116e46d560fc1b204cd8520bfff2536f5e1ebb90d04efa5f0995bfd8b26. 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/QZ5AB1848898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7465b7a2686457e75819ea93945579d23d4b072f751e226d778cb37a05e566e4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ5AB1848899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f7cbe83f30bd2ef0ea95b38b0a19e298fb4d09e893554dd53a625b21d2ef56. 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/QZ5AB1848902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8918e8cc6c419b6c921e693003df73cbebf34df360cf801c38a560328e1fa3d0. 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/QZ5AB1848905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674852e00f4f312de58c6d333f9d95cf92fdbd4f56f7a31c7a78636498ec7ba. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ5AB1848906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352aa3d836923b74345e6caa2ba4c220a3cd13acf8ecbb9c7b5e448c56225c85. 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/QZHZ52014927.