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 0xb1bda7104ebb724d0ec217bacced73e884ebb6b105d466cd692ab8b4238d931a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/731ba102-9f60-43f8-a502-6a1b02ba4b14.json and https://artists.proofprofile.net/proofs/artist/731ba102-9f60-43f8-a502-6a1b02ba4b14.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 0x8e216be7f5b39d6f2dda7aa825f0533ae631edb3b978639cee4e34c3abfc7ddf. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GXHAF2566564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0a8a792e7b9a633be472a706d1a84ea669e27ade4575f62a421e6ecd06ec7f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXHAF2566565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8cdf2831e347102c54410e00ffbbec9295bf63cac2313664fea804791c772f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:37:25Z), 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/GXHAF2566566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d050d71ad3365efed972c692143fd9b23bb222b605799200e6fd74f18c28211. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:06:04Z), 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/GXHAF2566567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2288f7ff79977e92371a3c849fddbc0fa20c379b76e47d416597bd0d9a0fa700. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXHAF2566568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c322960795764e53f880ef69689a74e3d8a65b7442ca59efb9b03bca25ad69f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXHAF2566569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5410f5a039a3df7fe1287ab548171f0f9bf7b93aa7902142244021296de825b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GXHAF2566570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4acd555d22bcc6fd8c638dad9e7bb445bcea7ac9909a2951658e74f19b08b4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:53Z), 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/GXHAF2566571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1603c3e2a9f04dc0783136073619f7f802e1616004c0bc8ec80860d6b29ec88c. 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/GXHAF2566572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5741a2b23a48c9a575d01969fef89827ce0d2d9b80e9bb7e9214b6ca54848ae5. 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/GXHAF2566573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff256bb6165242810e4c3eaf4636db05097ed43f147cb3c5154d0fb443e8d2e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXHAF2566574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85203107f14449d4ed30323ab7aa809c9511468d310d4b598c3f48b03e142bf8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHAF2566575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9ac96ba2bcd7162cf712a9a31240ebf5a31a2d7e8f89aec08fe3e5091b6539. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXHAF2566576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594b207eaf2d3b668d3387487545724b4997723f9b0dcc56ff3b3677c9a9e449. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:51:56Z), 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/GXHAF2566577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc840501a738dacf683c05d021e73953c0699c7b38c1fc7ba9d376c82eb3e5f3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GXHAF2566578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df91698707de08fdac9300969b63ccc66599dc1832dd5e4e7012796ab4d6a0b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:04Z), 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/GXHAF2566579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7a3c421b67ef74510dd09337058e55db6a90102845d6bcb4052cff4c61eca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:30Z), 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/GXHAF2566580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf183773d3efd4595759ca4a96a50c7ff8df6e6c676c0f57412c8a4639f9fe72e. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:43Z), 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/GXHND2503258.