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 0x0021e078af58d1146a6c0b40aabd003dd628a1f67a385f6d26bf62806d9edb03. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff22e18b-e10b-4d02-b262-acd3a59d407d.json and https://artists.proofprofile.net/proofs/artist/ff22e18b-e10b-4d02-b262-acd3a59d407d.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 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 0x63126de1b9c7979844ab660a1ab34b6cf19d8398e353d55a68f83b76649af0c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR42470281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd35ec47ab3954291434d22bc0254aa239fecf544c402c5b3b0bbc112aa64107. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEAR42470081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa059487ee5f8d76ca2df529ed11d853035ca7c98579ff5472c96c0d5858e0d18. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42228406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09711e994300a9c73dd9b13eeb616ed5df37a2749b22f5a0a01f906209e5778. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLCK42222327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58124c0bb9df77e167cf4accf0b43adbf15a56a4a0c7ed1dd74571aa0e175d8f. 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/UKNBR2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff0536bc344206491f47d7e7a6f00199b0f85769756a249aae626a38677f38b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCK42219848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4e24ed3d0e29406ced2c778de730049009139e9eeaa74decf440bf00b88b29. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCK42214048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65287be8a41e7be20debfa06e18fd1521184bb46bc7ac566da40559bdd7e73a. 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/NLCK42214049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93be4bc5886d96ca6b1afb52b0dcf8aa621906094dbd90ec64143e4d46acb1ed. 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/NLCK42212529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b927baf1d26eb2129c80e44243913d3562f30135e00093b093e3750df6db8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NLCK42212530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ffe87aa9e8914bc50aa0a171dbb9a44b34fe075f7b42c191439a2d0e744059. 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/DEAR42287751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e49d3ff1892572a2184181183a38821ad5a31f90078b9aa227b71f02d4dfd8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEAR42230628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b374ed018157bc09e447908c453babf4edfc461a55fd3a30f1888722a15068c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLCK41092859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34aa24b9c19f66c6f43a2b6f2acf8576e24ae5aebeed19b0225e5f1d6e4634. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLCK41092860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83541090518d67cd166fdf090c9ed14d4c999568362920b7263e5f2f8439023b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCK41088848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6ff9ea8baa1741aae1a8f744ab50e846d1b43ec92d1d436278bfc70cba104. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLCK41088849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193a8559aac21152940e4348468e7f7aa98666d592bfdc7c953d78a483d60bab. 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/DEAR42178857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9025ed5fe87c4911109138204acbc08b33292beeb2e8941252b143c30ea6147d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEAR42145776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb381d081cbc2e028309659327e48cd3d6f706329c695791291ff36900a37a847. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2118905.