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 0x045e066e3e26ee0ab585c458c701b92ae0c6fa7861b0553e399110a7f805b297. 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/ef17d3ef-5c46-4899-aeaf-bb092441e42c.json and https://artists.proofprofile.net/proofs/artist/ef17d3ef-5c46-4899-aeaf-bb092441e42c.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 0xe40c5a8aef2dc92f267821749eebc0ed3005063bcdd698a333e8af192c6346b3. 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/QZMHP2408931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f9d3071dcc9943333808a49efc806a22106da90fda53836064c73b422a06f. 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/QZMHK2464670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81cc63ca20fe515d02d948abacbe35b10682cdef3a4a0d15a4105ded13faac7. 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/QZS632496904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d537b4d8d819bcb70343ab6544bb394befec847bab83bc7b3d99c783cc891c. 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/QZMHL2384119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c7e5adab10829984ff5bdd85da50612e88eaee9fcccfeaf0aed28aa0f12d17. 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/QM42K2363371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8206c46ba3a4898e70d291c34139188bfe52c3e2ac158f130c527f9b09759a8b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZS632362452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda496558ad094acd21fec95b31ccaa3689242c40f141136ec717c6d491978e0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS642340861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7717b8d0ea676ac4f88470fc20f75ac83bb9fe8518e50916beada3e6ff0b9091. 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/QZMHP2394236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f109a0b5abfe358c085ac73c8a2aab048de99054cd8039362984529bfaa7ebe. 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/QZMHP2384878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a9683fd9a77bb45bc14f80aa63c60fdca066f746c5a279cec82ad28bf1b3b3. 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/QZS662278028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00757d11f5402b791580de2ff86da5fca5ca6b85b38af13c71816300d70fca6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZS652284942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213cdcb6c4abeb7a0fd94ef8f1e00a597172e0333de6ea42eeb21fa8489efc0e. 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/QZS662237316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe24573ce3c3b518f9c552a90d43b411184ac0e5947d5039365f9b11f48f971. 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/QZS642226293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb89d6f46b04e591e3bf6e1770f8a62a6b69a6e46b8fc2d265e98cf631451587. 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/GBRKQ2222221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ea674408c9b83919d5372385e51df00eb64721fe4100f4682dea3ab16c4b76. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2222222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505dacb7ff2829e6d0f180746f3360d02f86b6113ba45f6ca2a710dce2783c2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2222223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d7bff7d7bc641c9f564d0e44675831c9ead8f043709385e978030009a8ec36. 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/GBRKQ2222224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2b2fb226745a0c13996dcc1fe28ea00ab0961af32d9dc732d2e57930d5c024. 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/USLZJ2153304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd771dfd21ea8315ed243ab027b469181ec47c015c83090c8ed73119f56946b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2153305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ebb78c1d8dbf0bc6bdb6c79f614299a7c5fd5ed1d6e81be98701ee4f5d8362. 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/USLZJ2153309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682e691c60a679d0b83a8669f2b63f3420c05615c038e505f0e268b0fe596683. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2153310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d073dd39bb93c76a5c738324a87b597d39014dd943eeaf60c77d813c8fb994. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6542063528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e13f0be2e0414e2eecf5589e0925ec82ebf699e302d2463a19305f467678985. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6542063529.
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 0x4e616a25447a37d58ba26b2676ad91bff53bf4fce237b49db939f482684b322a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH6542063530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84fa0999d6d99070e73a0b903ed411e1b605d874532e713ae9d7027190fc7e. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/US83Z1905779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d015cb25fc2089663340678493473a10c3ef938f65861d94351f9682e46b0a. 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/UKN6K2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50e98acd089dc7b3fc4230035fd24d45697ca6f320c956cf5c140406ab4bb7c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKN6K2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c193680b7f9e27bd3c29ed822129b558dcff51b8a5642f8069de52f5f047cf. 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/GX89G2306347.