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 0x339bf5074eb01131e4233b985cd008086981053910a8682fbfc4c6030ad31fe8. 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/9a65ae1c-dd73-4dbb-8b53-ad3d2ad24b9f.json and https://artists.proofprofile.net/proofs/artist/9a65ae1c-dd73-4dbb-8b53-ad3d2ad24b9f.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 0xb8f77ca8054df58b34406fc1de0af1bc279bcb2a4af91409197232dc6e6f5067. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOL862130010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062a1d3ad8531bc4c5ee0202ab6046b726085378fae7e7b802c1c8972d0a059. 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/NOL862130020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1b8fe26c15421491ac48e01d5c4101d26f809aa35f369a65d4252f25e8c3c5. 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/NOL862130040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef866eded9d9226b6bbfb620659cf43420dfee7062241394521b110e141b1e52. 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/NOL862130050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe513445ee3509685648a7bed0835fc39e77199cebf4f29d326b23a61ee83e136. 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/NOL862130060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc9bb35d4becf00163c4cd6038d0f3d30d5306c5430ee1582189b2994bd66af. 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/NOL862130100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0220ac591aa03e2cd5d6e970340bc88b6070e4539552cafef0ef21c48321a608. 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/NOL862009010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28dd5b4612d0c01b8783cb092db09865db2e44e1c479d431af50567fe7cf5d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:33:36Z), 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/NOL862009020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9195484a22109b981b1562482b0cc7f73fb77d72ac58c4109a528ee55cf70cb4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOL862009030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a53c9f039fb23a21d57327858a3472222ae0e09cce1773d4dd210e78256322f. 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/NOL862009040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56297a1d5b0e6ca1a6439876a2e016e8cf3e58227081c4d773df379ce3987ca1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NOL862009050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215cf6491d654a15c8db56384cd476706800142f56ecec10ce77025a051d18a0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOL862009070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f77ca8054df58b34406fc1de0af1bc279bcb2a4af91409197232dc6e6f5067. 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/NOL862130010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062a1d3ad8531bc4c5ee0202ab6046b726085378fae7e7b802c1c8972d0a059. 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/NOL862130020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc9bb35d4becf00163c4cd6038d0f3d30d5306c5430ee1582189b2994bd66af. 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/NOL862130100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a53c9f039fb23a21d57327858a3472222ae0e09cce1773d4dd210e78256322f. 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/NOL862009040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0220ac591aa03e2cd5d6e970340bc88b6070e4539552cafef0ef21c48321a608. 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/NOL862009010.