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 0x16e93993d617dee477e62c76b87aaee7811baccc3e5aa17f9948a2ca3df67172. 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/18111d1f-3165-4c10-a540-e2e9e52280f4.json and https://artists.proofprofile.net/proofs/artist/18111d1f-3165-4c10-a540-e2e9e52280f4.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 0x7c57d76dd24f37e8ae707762c6e06e1b7a3ba54912d61b98c24dfcc5b7527fd6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCACX1730040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db51b27e54657ac7f774b8055efe61f24adb1f69067dd4d5699050ce9880411. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:12Z), 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/TCAEF1973794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7fce00a4083afb1306a97487574207da0922c604daa95154d1d29510e74d7d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W12106418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7fce00a4083afb1306a97487574207da0922c604daa95154d1d29510e74d7d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12106418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799423023377a9a0bd6a8b27e66d4d192e2fc37e6c5f8fd24b215b99f00f70de. 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/FR9W12100392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99f0e45fe0f449cf447daefedd75ca9ec3e50d4951b95c78d0e116393bf167c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W12125331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d36df39a45a71053e0d0a3b81636cce7d4026268314886e1c87d9a968d1c03. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12129878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650b32687f44aa95aede1b0f14947ff53628e82b12e45fd33fd2f32e79a86505. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W12131956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d368fbe71f10a890bb076448fa6a0783f36c1d65b0cc84bce7abf2dd6d0109. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR9W12216093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdded52bdacc721c4e62c88649c113109ea5b6df46b1e9a2cb08f6b54178cfe4a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR9W12228235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d9e4a49012e18440ecb4dc62a60032dcd5f0461c000b31592373e2e0abc21. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FR9W12226220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61e11d62752af1e9c9805380380ead40e0178e63b559e9aece48566d8ac7713. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:33:35Z), 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/FR9W12332180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a53a5521a25c0f0cdd7ac50393294e36c171fcb9b11e07bd3bfa128d08a47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaecacb7b841e2edca16bd453d0e44dca04336573c0a4e37dab5c7cca27e1bcf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR8Y72300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62de2fdb0bd5d305ef6e3c59e6d7676f14b83c6a2efe0add9658356d8e04184. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR9W12428326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245089f15e25de26c2634fe0445bc0cca77f9cd4975ae36de9b8bb96a1b2f645. 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/QMFME2375776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0f5d0d5195ea6e969961a679fd669ca85990e2af371f07ba95545ac1fafc7e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FRUM72101137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb1f60198f42aad70f24de054036d56f700f64ec85fb22bcdf38e8217016905. 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/FRX762125239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef765b0c46a3a5718780da1bd9d415fef6266fd016c8bdec898bad0f9421b441. 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/NL5HJ2300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301b25e4fc1e589541066ea39a51d10d6b34774136aa64a70220ecf6f9755e0. 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/USA2P2312743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bce68c6bb8b05f72e7d0ac2c1e0ad21f0e3d96093193be00501dff33c6733a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR8Y72100269.
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