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 0x34e099081d44513124b62df973034263c635d9161b8d319d4a11279e9d455e0e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4e8a543-8184-44e4-b836-2d26fed098f8.json and https://artists.proofprofile.net/proofs/artist/f4e8a543-8184-44e4-b836-2d26fed098f8.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 0xf12466965cb52c4ce835dc0ba7a21c736361697287b633b092f4766a6d4be34d. 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/BRPVB0700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc8360af64728549a43044f7a4d7de10deadef7abe91ff3aa724fad32ed047c. 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/BRPVB0700157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d79bad1efe51140fb8a473419089cb9a00c7c63451d76c33f2f85f70dafcf9. 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/BRPVB0700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b74ad3b0912784308e39b25068e0d09af9dad6132c713bf2c37f0ce01921a74. 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/BRPVB0700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97497b6bbd4b14fe255a50bbb9290c9b95eff706cb9b74dd659507d0f040df18. 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/BRPVB0700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ccc5eed1fdcab2c38c82a4e6ac06fad1fa8b7a078c4067dd559839b919979a. 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/BRPVB0700161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c90d5e92091d193313873d8f8d695771dff78b2b364aeca6b18588642e9bd41. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRPVB0700163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d1121c2bc321831f6a7f19e7d148d7b2163cb768dbcb0e1dff226a56955242. 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/BRPVB0700167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b366eb8fe875312acf033745412a5246bc3cbf571e2737fdc9add51355e1c3c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRPVB0700162.
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 0xa8c7b6b854c3c042d33c4075a6a82fe805fc853b6403aec48bdde5e2c4058f3e. 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/BRPVB0700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aed0c3fd915866f82d82d93b8f72827965af20573a1bacbe4b3c0ecd03fffa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRPVB0700165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d7fa0c86d96425e9d7c592bdac3c7c747da087607f68af3a13c4565ca50112. 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/BRPVB0700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9028535f5ad13caa79e3397decca8422753c23f2d574e322921950cbf286df. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BRPVB0700168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b16744b6ce133a5616e1cdb166defb7e1c5aec86f663c59af46b017306bf91. 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/BRPVB0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a01707a2271c54360d3ac05b7ce3f0a67485fd76245ccb06f92d5d9f031d0dd. 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/BRPVB0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7ba18241aab461ce2d2392256aa73115358c803107349d7363f506e4034f45. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRPVB0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0761dafd4130bb682790c2c3bc28d09f2e31d02b2e275b7a0c0cc3b7dc361dce. 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/BRPVB0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd41a1b26e8695b5c0a58d4dfbc71d7aee319c467ee15a38da4fd5c8f6a3d345. 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/BRPVB0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc40b30e7f5fa0f5e2d4addfd718d0d2c4f35a03fb71c909130da7709fcfaeb4. 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/BRPVB0800006.