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 0x8fe6fc55f60fc036b1e2f0f199489524141a601f2cda976497b6b28b49530e23. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/870e2473-4558-4c61-b120-bc95b799c98f.json and https://artists.proofprofile.net/proofs/artist/870e2473-4558-4c61-b120-bc95b799c98f.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 0x94acd32c2084d95a6c58b4bccbc464193f416dd916f0cbcda43ea348328d4b14. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SMRUS0067109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9311b873c23c33b2f38bb6407f7827eeb50cf552fa0a596e241e7e2ecdd01b61. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/SMRUS0067112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897e540f0a84a68bfec04bac1aa04f95079c1ebc6be41dc80f8556120521398f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SMRUS0067114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa876fa80d842f0d2666509f5a85cc1938d23dba215f3745896ec489eb42d5541. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SMRUS0067115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2ffedabc225cc165abe3d976b44c46c1cba9f1830fe2962b79e077cbe999ba. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SMRUS0069669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34699f381f304d235cac379f7e6dd6bf2b8cafecffd8499920984395d391065. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:40Z), 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/RUA1D2551507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cbae30352cf6709297d595913f3f393877a918b88b5a52e8e667f5a7d24d42. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RUA1D2589279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86917b52c50cd43454a1b1818e970485cb797c74d447b6c7e8e5d4de6e8d44cc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/RUAGT2537948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f81fe03eff9c3ede26e755e74aa24ed766e081c928121aaa156ebd0f596c77f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:42Z), 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/RUAGT2537949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551313d6092c1f163fa85c09a733df6c71e6e3853d1cfd46d3af832bd45d9b09. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/RUAGT2565472.