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 0x518eb01ddc135f24772a645b7d2cfeffcdafd8263add5d0975033170efb33180. 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/5f1a857c-d924-47b6-b1e0-6234231e7074.json and https://artists.proofprofile.net/proofs/artist/5f1a857c-d924-47b6-b1e0-6234231e7074.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 0x7aadd5f3dfefad3646081460c391bb3928c40954d4b5f263bed621974c35c019. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZES82092074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e967268bfc40d223a9d3c4382d10833767faf4baaf515a8a77dc7a5a95bb810. 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/QZFYZ2186532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc72d5a70c25ee0ee67f424c1d2c4a2c328b93e13412706c6c8a4d20289f1d19. 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/QZPEW2115341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0624e3f0939779caf905bafba1daf69e38fdfb0fc06c83f7ba7c8286bf8a9af. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:10:39Z), 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/QZHN52287545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bec53c4e3ef8192c95fead7ac4038d5fcb692fa7f8b45d017b0417bd8683e8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6N2271316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78bdf139c4d1598fa12e8bd9ec754b9702a754df0b37c26f2856eccddc39d68. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6M2254195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26347368cbcdcb0e60023ab4521ff32749a07506d42c978f92bb4d5da55968cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6M2254197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72000ebb6422746aa2f79a281e754d7e85d0e5095bc2a4b82522229f05b006c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWS2297918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67876b00f0e329dbdd9540f072075a30d585ae7c13db3bb8ac787e39c46e10fc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ42300896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad561bb91e3a6a182e01e0fdd1a8cc355f6676d4b43e05b724754d01f5a7a42a. 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/QZHNA2490522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10056df30f5d59cb580b4a53941c5ca4ce935ab691a2a7d690b1720661c2f8b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTAZ2413715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ab52af1d901b63cb2a868f116baa634d9933caac405666d4805aa4e033d4bf. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:52:46Z), 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/QZWFP2454126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04089a99152e95ba987e38a5c6b6df9de27ca075f0354d4818bc71d56801ff7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFU2432122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1badb89179eddbe821f261fe8e70eac25a5d7aded62b5f1ddbf514ae23f1c966. 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/QZZ792450320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe567d632e6e6f12f36bdeb5adb173bb9973a49e161434d8a9f2f0b62421c2989. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3EY2478718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9eadb63475b670ac47fc2b7fb08500fa402b8930a9ecc1bab5fc075341c572. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB32559383.