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 0x9f923d4a833531f7f7dfa36346658b93c74c35f926ac7f4b5f0793fc115f68be. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a250da7b-3a1a-4131-b441-7c49aa1a14ad.json and https://artists.proofprofile.net/proofs/artist/a250da7b-3a1a-4131-b441-7c49aa1a14ad.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 0x2b73f58c5438ccb43929a4a41a5c5d603deebfd3469c50f3e8d9519566175839. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZS642453743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e7a1a893fccd3f16b052de5fb4b919f3f25cd99ed805275225f474ca20bc5c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:52Z), 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/QZS632467535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1fe7b0f6cde3f3e20306f6c3f00d01505d1ffc1aca5124514ab78e76b99390. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZS642454858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcef5a9a102a35551e08f0c54550fa4c2193c04a37a8e88e39dd72e7607bdc82. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMHP2493261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a2ab8f7adcf4c58adf7cb0b157da7ebb2489a79578b1794f9357cd21b2afc. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QM42K2491569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a46ecb84e16fc07895bf3149adc4bb88a5e63da19ed0ffa35eb21d1eb66a01. 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/QZMHM2465497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cee9eb3207ed215eb6735c577ab1a07408c11a4569437a05fdbfb62967582. 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/QZS632451133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f8378cb6f94e5983ad2d01194181af299af863ff83b95703f173801359bd19. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:40:24Z), 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/QZS662486417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44ecf9922996e12f6d19fe0273257010d7b6dc2bb38c2e1de7de60068e29385. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZS642497514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a499f2ca5f76fb1cd2466913d4e1312908e86be188fa6ee71ab98cbf9b44b9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZMHL2490068.