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 0x89d7c8e452872add286487b53bb57d9913e8d0e82697eacfcdd7e71f5923e565. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0bd48e8-7aa3-4b7c-ba54-6364c449c0de.json and https://artists.proofprofile.net/proofs/artist/e0bd48e8-7aa3-4b7c-ba54-6364c449c0de.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 0xe6eed109dd807e26f85cca54891a0e3d62217f4684cbaaf999856daf2901cd12. 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/QZFZ21929201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e6b6ce7926febf624ac7bb7868ce70b261e838b54dcae7e4ab4c5f29dadacd. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ21929203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c60515ee4fb31fcca72360122d3c6a3a2fed5adcd9b685429f186aacc80f786. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ21929204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f245675a0ec6110a95b8b171db40dec7fbe10b51836f64fa3d1d590c6cace5. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZFZ21929205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999c1b3ebc451f8afd9edfd9867066d09f80d95d43a119b2541d5751bacfe552. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZES92363442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f1e262c511579c5e25e42ccf7fe48a3dfd6bbd7b86202b62ed1a02a5010292. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHNB2329804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca7663b5b2f268f77c795a7960b44a2f2184800d27c418aec19056be285fc69. 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/QZNWV2307058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca79e47f20478e082cd17e2e45d2f05025ec45172b475f941f63da5827216dc4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNWX2373142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35caac8861833b449a5d3344e57e63f9af456467d973b930390ea5e8bda9e60d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB22406590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dc7f48efdac1f264a850767c31fab317f72660582b3aa941117eb8dd35ffb9. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZTB92420439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bcee60dbb2237a63f7ad6b33d8090eff8b48423802ad3158890a044c825261. 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/QZWFT2433909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03345a7e8086372c43d40d4f67178c7dfc1e8a78542859bbe8cb4b8c534fddb0. 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/QZZ7K2447413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84030ceb97e4cd66688616253d253647bee69f2fa19b3995139059479848a5f7. 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/QZFZ32534251.