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 0xc25a206059600ccf73c604e20671cc15116b0fa2ceb109b347ead8e19564478d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d2f3c77-7c92-4607-92d5-fe092d600fa9.json and https://artists.proofprofile.net/proofs/artist/2d2f3c77-7c92-4607-92d5-fe092d600fa9.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 0x68ac982e2e2d776d92735c4a93ddf766213950f6310ecd246d5524f81e5d8d54. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2413097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f21ef13a0a560cf62ebcf9dab610200fd51ccf473dc65e41a7a8cf941ac5020. 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/LTP382400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abcb9962ade83555c7d603382819570320ec799b59ef7b5c38bdfaa0ab5cd45. 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/QZMER2437265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0641ce27c743fcde9cd6806cf70cf28aeae8836c551abbe041199e701ca8654a. 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/QZK6G2430636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80df51c1793fc243cddb9cc17aa263d900604e951da6d49b006f65724930fcfa. 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/QZK6N2427576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6836033028ebbee4b36eea0ed760c5f959739bddf864821ef8c669d7c2ad62. 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/QZHN82442850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3899901d7710d0bb9a7e51f41741276395e424fccbb71ca2b8bbabcf30ae65c. 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/QZES62403445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b12bcfcec43b78314422534f566713e63d5275235f691520c171215bd4349c7. 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/QZWFM2310356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1240c8b89add11c062378564983cb72800e0eacd32221d17b2293db179658b1d. 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/QZWFE2351346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d2e0655d873c3a4e084f149ed9b5ecfc1a96bffca272a0645ac19d10208d31. 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/QZTBE2324118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca05dccf1b04a6369623a403aa4394f0d8ba684dd81afb22a3423f4a620d74e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAX2378014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d2d9ec998000dec54dde79f08725c2b9b8f47600065ced3cd86c6cf48f77e. 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/QZTAU2394558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ecb2d1d8d7d5f53212f235cd42553d26de3a0f90e0e71ec755a92417db1d7c. 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/QZTAU2394559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6e7ff844394b50bbe22c0fef6d4936613e73777ff6c3a64297fdef6080422. 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/QZWFV2462653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bcac25f40a511ccbc7806403a5395c13de9454aece5195720057d8f964f2b3. 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/LTP382400002.