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 0x1dff3f2bab3b16549979a6048b678d1c6411c393db21268254ae5ceb8f18bddf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3dfb72d-49c3-4046-a556-aab2911dd37a.json and https://artists.proofprofile.net/proofs/artist/a3dfb72d-49c3-4046-a556-aab2911dd37a.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 0x4b0ce08b99c2a5a63b1f9158813a7bd36f162ccd701c06a5106780d50911a5b6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJL2562761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955ceacbd59e16154f87d7ab0d0e7105acc93b3c6f083e970c9123f2a21652e0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAJL2562649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa21412af0f4fbc8e011b8c1a87d8779aa86e0050163dc681b1f5138fb6a78dc. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCAJL2562688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d665e6cb32c5215e1ed4c1492c50e877eaf4d721ff3ecdb1de5e2165ec61d5. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJL2562693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8b475b0cf5f46833f7b708bd8426724922e95d27e120b7f96aafbcfa8f6c75. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJL2562718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f3b52302f7c7f798cfbc2cc43a9607845ab5d216ce8d7b8565ed3225cf391. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJL2562773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacefb1f0e4c51470c777444853a080d592021e8c90a31ccf0711a9013ac0f4b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:22Z), 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/TCAJM2525470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ceeaf8383d0f162cfd4c4c14eb23787765884dc7eecac28713fbd098696b00. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJN2525614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac351b0c41bfa1f7ae5fd7118d6a84c48ab2c641a051236a3277ead3ca913597. 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/TCAJM2525521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9104f7e60f2c0f2caf621ef91c19f4cc6aadc88bb2bd68704907a9fe28aefc14. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJM2525567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67b384caf49c877f9e101eb42c09414848730c7869d93a0b679855839c8d4f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:33Z), 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/TCAJM2525418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f97d03a7815616aa517500831dc78dfd9f02c974522808cf1f431ed64bd936b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJM2525542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c120a7098c05b9ce649ccb91279a289f0c627651220129688c242518dd56c3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:54Z), 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/TCAJM2525551.