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 0x182b20286c9fbd6319e9ee100799105be821ddd408ffa8e9fd575cf57df2a12e. 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/4995741e-0dde-4192-87c0-368abaa57272.json and https://artists.proofprofile.net/proofs/artist/4995741e-0dde-4192-87c0-368abaa57272.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 0x47d528b390f6a89c849b2afd0c8e3df65a5c11172ce4d5fd9848f2c8765fdcc7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:38Z), 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/TCAEF1962103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900d9ce954e863c27e8281a09e9a1bde85edc3619f3491a6d74d8a2d5b335e51. 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/TCAEF1962113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cb188a50950e84d3a7c2712667a5c7384fdd74efebac77b9185c07d7ad83cb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:28:34Z), 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/TCAEF1962150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd84200583b834592b42ad683980f31c1f591e620beb568bc6e934262d1c7fd. 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/TCAEF1962163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb874907caa9ec9f2c48bda4cbdf8db29c3d10ca71bc44bf1882f52cd7612db6f. 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/FR59R2114933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b7ac17ace404063dc8deb1f31d1a19b45f782452c118a15052ed702d4df56d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR96X2127240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c04253e095f9626e52bef213c3d8291fb3d7f27c3c39da62901e0fa6731804. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAID2432339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4116c44100de99aeb69d99f35eeb8c7656cc675ef74466388d830c4a4a9b0990. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:59:52Z), 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/TCAID2449706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea711be8e3ae235522e6ea8dd3ee4d83ef7be343ddb7a00f5ebbdf6de6085a9. 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/TCAID2449824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e17b134888c30e876a6892543eb4ed5afb2fc461759bbdf37ce1a1579a5574. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIE2450117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63708ce5237825515d7546021f827a390b15ff379ae47af835462439dfcc26c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAID2450332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd054c71f5987893a4e83ca951fee1876935d4a0dcd9b10973433dc45887d8bfb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIE2450588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a1795692f988b25858e3c4b13412d7ad81597931299b4830bf819cce8fce36. 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/TCAIE2450708.