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 0x651f6969caa995aecd6532bd4b763b39b184731fe0e954f057436d04b2cc00a5. 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/fdf6b438-0404-41de-9dfa-4b97a677b801.json and https://artists.proofprofile.net/proofs/artist/fdf6b438-0404-41de-9dfa-4b97a677b801.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 0xefe807f133de9a6c4a23afa3f78b5c1b6fa9adfa5b75fda17f35db326d4ffa3b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ8LD1962311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84213213c530ca80d1916d7eff714de2e3ca2f41612f49ef976fb1b766045f2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFYW2047672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350cd7072d3aa3672aeeca799208c06764cb4619848c8b18aaf08ee5cc7521a1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM42K2094451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4abc89551cf9e961c74ba55a225d6481ccb8cc0ff923ec1f67fbdc18ff0f91. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:50Z), 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/QZKDK2162296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe283a1fb5293ba86b9e979269d22b47c3df02b0836efa95b140756defa7393b4. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:54Z), 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/QM5LC2100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac5bd0195661fc6b0f6c0a94dca93bedf3bebe9c7b052481e73d2491023fa21. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM5LC2200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e69ad4b9981282e421f43fb4405f8db7663ea338aee715187603a574cfb0eaa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB2LD2210217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b94bd6cdd3e719f8aa1b2c06482ada4774380f864ee5cd3f43d0445cbce6afe. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBUM92200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5730f64a1af609c244e624a3567acd2bf26e82972806dce4544d6f7659160df0. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/GBUM92200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32014642b4ced1a395898a0d665e764ed398e50073ceb087717cef919867121a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBUM92200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae30e37df227d4387a84b762b135cd8772e17d2c6c07d0b30fb85890287e638. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM92200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa102499ba9ed25444cfb8f8dc1df52697cbdb00c72ca9e2b954d08f4309a6b0d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM5LC2300614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dad1f1a8294f47037cc3d0b3009451ddc06662023c5ee39bd733dacbde1e0c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2410325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27409fc7ef7c6c4353c181956332c911552128002c914a9b42650fd41c977ee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL8RL2338267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59304c9233cd8e8766d05539d8c00709a0121072dd5b08d1ae8d28fca2535e98. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL8RL2338268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c6d3e48a55d9d32e758e11cf5ec84cea35f1791512cc1a86977123edb79bdf. 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/QZES52030021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedb04385d0c1a1e113568532f321db0c1960ec65b795573caead1ab898828ea. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBEWA2303262.
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