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 0xe555e588de97d1b7b6cefbc826015849abd8eb52f53de789ab31adaf4f55266a. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39b9415b-5c97-42e5-986b-ea4bb6f2c773.json and https://artists.proofprofile.net/proofs/artist/39b9415b-5c97-42e5-986b-ea4bb6f2c773.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xabecb1483f98de69d96809b6b3bbaad69a36a3e53db8c141951038dc1393e0ff. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHN82326766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e15ac9c71388b52be7a084a436a448e5b39497e95e890c3e437eebb630c1f83. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM22385802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebcf9eaff31f824f6c82828a6d531ff88b95882c7425d6d7d30220d53755a62. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM22385803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0183853aa5af2d9bb13075651d186bfeed18ef23ac57d9c8ee65170798c1705a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM22385804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92b54f3ff8aa5cfb72f4135dc07e3e77f6f5cecc77cfc1f0e58a3ef13541a36. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZK6P2496777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d2a57c0ee4b1cd3eb4fe85843ee878a6afebc7896b387700529d6122573be. 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/QZK6P2496779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3013da1e19bce148c9864e33f46088ad16a4df192a3fb2112fa77a6550c46685. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:58Z), 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/QZK6P2496780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240c223b614c08734c7e2fa2b16e68a786a2ea24a5906bedbaccf10cc8202a33. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6P2496781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a2593ab5508c5b8769fe011e778ed6b82178fbaf70d342c146907f1b59db72. 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/QZWFM2510712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04435192c23f9da505ac697cbcd5c2bdf58456eac01cb4bf9f3acc9cf73854fc. 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/QZWFM2510713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c5c7bc78ffb2205cc456db9b53caedb29faaeaeeb9c4ba362c5433f8ce1d81. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFM2510714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a05c5e176fd6aaaeb1115c6c526085444e48e6874f9acf11252105c02e9da0c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFM2510715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea1939cf6368e0308eba92516f3810228603b67359e8a05b477eeb68c50d627. 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/QZWFM2510716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb671e34f90560f856875b484bdb5123c0f2d92ba961f89770cf595040c95c2a. 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/QZWFM2510717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90a37112ebd064765cd19cde051f83ad46f3f47cba8a8607c4d88f37f5da426. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWFM2510718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344165bef4adfa905dbe5550b1a16dbdc18c7bf0b70b91e0192870101658aac7. 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/QZWFM2510719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29944b27e24549cdca0e42627ba622cb0653ea3761ed24f2085ae03cf6c99a14. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFM2510720.