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 0xe1edf8de085cae7449b103c443ae977abccc69c6c1f865393d258ea4aaca0def. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77a12629-f896-43a9-ab4b-c27a4442e73c.json and https://artists.proofprofile.net/proofs/artist/77a12629-f896-43a9-ab4b-c27a4442e73c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Songs They Forgot to Write in the 80S: Vol. 1
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 0x4270b8a4403010f8965b13e074791212932d53a12f2602eb739fc3c57b3ae61e. 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/US7VG2578067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd91384745eea88d33b1cf4368b2a798d656f1aef680f55a469f941a6110527a. 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/US7VG2578068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d72b75a9f439e9b5e8f3220a48d20fa39e870701187cb21d1255cfdea8140d7. 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/US7VG2578069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56430f505495a723b28184de50d431173826e10d8be5cdbcfcb2e15d506536f9. 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/GBMA22374657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8353ce1f765408058a0c7c3eb0f2e6d89295d81b37b72e9f526ab2eee725778. 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/US7VG2578086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d57b240884f6bbebd18a523e0a74a66d79b151c24fc231783a79b2aaea167ac. 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/US7VG2578085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ab722d5cc4dcf72c6f02c08a564b567036b657e44b2faed860f3b729462426. 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/US7VG2578080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8471dda56f66020e0b2a6a0f85ce86bf023642341909cbcdad4eb0fe3a89cb5c. 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/US7VG2578079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc68ce0a625454570cdc5fbc502ce544fd36d44432be366d2ef349f6cd2ee5d. 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/US7VG2578083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93493c714c2fc71522b45ed37f90784a778d017dcd59fd9ada09c5cbfd28da19. 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/US7VG2578078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888bd56afe3f8c42b0d6eedd47274a0f6192b05a8bd77055ca88aa0ab727dd59. 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/US7VG2578071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a312cbabd63bf1b5d14544e77f3708ef73cc6be94dc6eda9d1bb287786eaef. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US7VG2578073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830b0d478deb27651e2beac24aefd515f34427dd0470aaffdcdadfd42b13f405. 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/US7VG2578124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77916442cfaf5ae76f8d752d48a7a5bbaa2d802c52fb22a9444baa32283da076. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US7VG2578113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35caa04b428d748b500ec4459ef9358363125d987156e0e293c1436122d9689. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US7VG2578070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649688c496dd8a86bbb6176f7c9d5079af082cbb1ca691158d390649706161a8. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2578092.
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 0xd9f3012f373a87db6ea7ba5e3fa6d5de0cf473e9cf1958d560426471eb129d69. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US7VG2578122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8e68e98d5d816af70a5b1bdc1ae46980d47af8fb6a0baa3a87b21b77ec85df. 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/US7VG2578084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb55524aa3de4c9b5f7e3a510524abc5d92f0fde53b212d1f89896c4c6f83c5. 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/US7VG2578123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff551d91a9e7c10764440139e6d1d2419b398011593bc08b12d5fcfcd3a5a7. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/US7VG2578096.