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 0xc79a51c10bcf76b6d51c7388ce5be66fa36069f6d6cc2c66da6a9251d6700953. 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/bf86f965-361c-4e61-aa42-79a3c3bef710.json and https://artists.proofprofile.net/proofs/artist/bf86f965-361c-4e61-aa42-79a3c3bef710.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 0x0567400bbcba7831275f14daa3dbeb5c73cf133d684645ed5d3a838a9a43d2d5. 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/SE5IB1600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a7c79ce82e60283fc469f0197eaa03ce648a5d748bceb3355dd6d98d735c4d. 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/ARQIW2410450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaae3fbb588059932fc734b2837673f333e5df78a26c0ef6fce1664a4f9d27c0. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ARQIW2412105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567400bbcba7831275f14daa3dbeb5c73cf133d684645ed5d3a838a9a43d2d5. 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/SE5IB1600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e717c0db2f2d88c346b79bc9fcc4e3ff630a1e879f6a651b5082f56c36906b. 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/SE5IB1600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8eb2f0c630077d3b43132c6715c9311ce9bd48901d226e1d1d63813549d8f2. 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/SE5IB1600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e0a07254ed6154d88021ae0839e23aed3a567221526b8b61da2d636b7e95e9. 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/SE5IB1600130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567400bbcba7831275f14daa3dbeb5c73cf133d684645ed5d3a838a9a43d2d5. 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/SE5IB1600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8eb2f0c630077d3b43132c6715c9311ce9bd48901d226e1d1d63813549d8f2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SE5IB1600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e717c0db2f2d88c346b79bc9fcc4e3ff630a1e879f6a651b5082f56c36906b. 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/SE5IB1600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e0a07254ed6154d88021ae0839e23aed3a567221526b8b61da2d636b7e95e9. 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/SE5IB1600130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567400bbcba7831275f14daa3dbeb5c73cf133d684645ed5d3a838a9a43d2d5. 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/SE5IB1600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e717c0db2f2d88c346b79bc9fcc4e3ff630a1e879f6a651b5082f56c36906b. 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/SE5IB1600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8eb2f0c630077d3b43132c6715c9311ce9bd48901d226e1d1d63813549d8f2. 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/SE5IB1600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e0a07254ed6154d88021ae0839e23aed3a567221526b8b61da2d636b7e95e9. 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/SE5IB1600130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567400bbcba7831275f14daa3dbeb5c73cf133d684645ed5d3a838a9a43d2d5. 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/SE5IB1600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8eb2f0c630077d3b43132c6715c9311ce9bd48901d226e1d1d63813549d8f2. 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/SE5IB1600132.