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 0x792ff45dcf89159f02484009d6fb36d6169492d3c2ac7b2706c409924ef1745a. 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/d26f2b35-b955-4ab0-811c-16787a378c81.json and https://artists.proofprofile.net/proofs/artist/d26f2b35-b955-4ab0-811c-16787a378c81.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 0xa272ea83bf645ee27eae6894a1d2591639adb51711358306eda8730f71b1c61f. 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/QZ5AB1837336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d344131841e9af19027dea1740a587c6f9d7a4148f3c5da46f87a57cc44321. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:36Z), 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/QZ5AB2030270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d3777243d5a05a690148c3cacd485559cd88819cf95878dc39b7dc21660e0. 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/US7VG1842268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d9d12fa51b08d2035a93583e812701d99160f414f826d210423feb73653ac5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1917865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa677c8f4c2aa8440b1204bacb24eaddf027bb2b71a91ead4c8b97742d24e55a9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZGLS1911562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3a09217592bc4cab600adcbd145d04c25825c08c340930a700dc412583bbe1. 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/QZGLS1993649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbb2c29507a835e932cdbd430059b8098885984e4f3e47f681532024f0bbfd9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ31966386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c869db77023d4e364b115d509b464451b9bd4cbbe07b3b0f817bd94c10670b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLS2038618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3635fc3755c16136166b613ab2dec3a1f5cfb80af6341e720b12bbec9b772bea. 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/QZMZ92098492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2246a3d1a1a4812794ec5e9b740df1a6789d2f600502af44331ffdb8e1b6194e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTVM2366654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c306d21f56d6500b5365871f5f4c6bc2b4d10b535e8c7c7aee91e6bebeb1c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT5M32514322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1625563dc6301cd3602838f191259db633af134b89d148077f1419499343ab95. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT5M32596411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb721271b2f4de76f79a3734c862c8279d459850049669a7ba9d3ba837b4903f4. 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/QT5M42536527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe5fe5fe130ce08d00f6416c86834dc10d35afbee0ec694f5730dc74ce09c51. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT5M42582077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fbea2f71862344d5cea6a5a81b13984558a69f3cfa0ac66bddc2f9d905fe4a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT5M42539275.