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 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 0x3b41987903e083bd99536b8b0c86d4676ab0c44baf2752ee2803e6531031b068. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18960d31-7b14-4ba0-8b58-19a6357eb4b5.json and https://artists.proofprofile.net/proofs/artist/18960d31-7b14-4ba0-8b58-19a6357eb4b5.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 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 0x5a123435b1ed6fd0bb6fd0178468a0e1b156e4ed7ae18e7b8995487316533cc5. 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/DEOV42400371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f89891c8568d71564e8f865c8ef56948ea20d509622857872117be58f461fd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEOV42400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ca4276c9cfbc905f661e68150e78e796457fcdb059d5ab45e5f81472f4cdfc. 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/DEOV42400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986dee87ab1d3005b8a4bac841e68f829c8e3151e260446ae257ce803b81d329. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEOV42400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76575fedec8c63e005f94c409d199ef8aafbe00b42ed11a81aea9f9b1cc4aa2. 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/DEOV42400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354bc6bae318c995431b61b076a3bb462e936609f9ec73eed8e6a63637439142. 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/DEOV42400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e07ed90838d14d482d53eabc8765911b9e763cb4b3009200387364c322bfb1d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEOV42400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a1b6a4e25500513245266cc177566ba3b1bf9ff1ec2433f1b41c50ff12d54. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/DEOV42400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07074f9524301935793f7961cca485192aacc0f929cc9db6ff57eccc9683d4a6. 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/DEOV42400379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38669261a0d452cd35af88ea8dd14ca89d52c958b1344896d49876fa57aac276. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEOV42400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc282cc8f904bf3238b674b3c18aeba88f80be9bbdc4846e15479d29033296e. 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/DEOV42400381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aede2ba23e31ba0d23fd9ad8301b26f82df48aabc3f27e6bcfe7811c8db3d44. 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/DEOV42400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354bc6bae318c995431b61b076a3bb462e936609f9ec73eed8e6a63637439142. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEOV42400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aede2ba23e31ba0d23fd9ad8301b26f82df48aabc3f27e6bcfe7811c8db3d44. 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/DEOV42400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f89891c8568d71564e8f865c8ef56948ea20d509622857872117be58f461fd. 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/DEOV42400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700fbff82755d6b852e7ba0da217191f33b36ffb0be157d6720f9258382a6ed1. 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/DEE881714034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084b2cb691e74b0e0febc2b6157a26de49ea2011d0cca7ca04058efa475f7c0e. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEE881714035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277766e44f2b51bef702338c60aa29dc165f68f5ee433d2016b5c5cbd84abf71. 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/DEE881714036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e4cdcc47aeb1ee6eb5f133cfa0b1afcc2d80818fb2d7905edb9130fcf59769. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEE881714037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084b2cb691e74b0e0febc2b6157a26de49ea2011d0cca7ca04058efa475f7c0e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEE881714035.