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 0xc27a10c313805a0c287b92e50e1b4fb9dce26b9eeb43999d0fbf986987ed2fc2. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a590777-573d-4a85-972b-f92edb110941.json and https://artists.proofprofile.net/proofs/artist/3a590777-573d-4a85-972b-f92edb110941.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xde039d36e830ee75183728862db37f867d67420a29d50d89872057661734becf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740166 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de7d4bf59a9491bf67091872a9153836733eaeff9e6025e700b71692f7d7e9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740167 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc3e81e7d2e58efbdae08b67b40e4bc2b4d4b3bdfec327e0cd747afb3f8d1e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740168 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391a18a9a0899ef09d96968743926e6e068a6faa631f3404418351b3615b0a2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740170 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbd1058bcae437d3700d5776b0cd4eb88dc86d7721aa5d2293ecdf30aa65218. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740174 — a six-check JSON result.
Shall We Gather at the River - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a21d7fa5c54e65fcaef710a34911aa8cef6a71b1ec920d179b66592e56297df. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740177 — a six-check JSON result.
This Is the Day the Lord Has Made - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3bc4d501662e641d64f30ebe6ae190482818ee3fa89804d4df1a98fd572451. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740181 — a six-check JSON result.
O God Our Help in Ages Past - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ede53876d3d3d00b4272d8185343567cf2ead3fc334ac08c87d9f91d333437. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740183 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd252a78070ff99e9117fa86a61c3a617aafa0859023ae1325530ff8150f0de18. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740184 — a six-check JSON result.
Onward Christian Soldiers - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68345465e8b8dccdb64ed4c0e10b943f5c38f435bc33f74c1e7d941dfc38c92. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740185 — a six-check JSON result.
Battle Hymn of the Republic - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8d1648ae785746dba18aad5d38930ab87a0b9946c290bd2328a266b5e1dfc3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740186 — a six-check JSON result.
Jesu Joy of Man's Desiring - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020a9984d1326f49f2c3cc84f6f7cfde842d0d85e8325d1330ea53aa81bbd959. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740187 — a six-check JSON result.
Immortal Invisible God Only Wise - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf603a5685c3835d6246a706105d73e4d28a64ee872cc92cabe0c3fcd1fcf6a3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740188 — a six-check JSON result.
Christ the Lord Is Risen Today - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f8d096215ad5e9c69d25e49f76ca24900ebe9882b5ec4f2e981c79426c441e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740191 — a six-check JSON result.
The Day Thou Gavest Lord Is Ended - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa750009358d7bf6dcec424f1e8963285f36c53e2b90b348435a521904fd3418e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740192 — a six-check JSON result.
Holy Holy Holy! Lord God Almighty - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0847a9776a318113a3401d63414a15ce249160bfeef439d80b7027680ae0ebd1. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740193 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad720b49e96ac2e142a8593d24c4c5730aa4abeb1a21fa9af233c6d5592fc65e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740194 — a six-check JSON result.
What a Friend We Have in Jesus - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8dbab8cc7f27cd997e2bfb05121dc2a49c87a450e12f92384ea49166a7dce6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740197 — a six-check JSON result.
All Things Bright and Beautiful - Church Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1ba4b9e04e3ce433c9fec7a596622dc25363df5caf0f561344dbd7ce558b0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R30740199 — a six-check JSON result.
Hark the Herald Angels Sing by the Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f947796ec41d4b49f23ed930f776490fe88237c862db0fefa4aee983a433a3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4R31122719 — a six-check JSON result.