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 0x92422f9d6c2e966f4703117bb7c66cec80404dea8099340d6f21c2acfff75535. 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/3949afee-a981-49ab-8fa3-3fc3b3576b75.json and https://artists.proofprofile.net/proofs/artist/3949afee-a981-49ab-8fa3-3fc3b3576b75.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 0xbb9ca5e0307cad17d35b54c0003915b825f60867a32ceca9d34f2a71934239d1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN92360554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280778fdbc6491cff7888001c3397c6055541692e2bc5502cfba3eb0ec75bef1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ8A2350484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280778fdbc6491cff7888001c3397c6055541692e2bc5502cfba3eb0ec75bef1. 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/QZZ8A2350484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdb6d49235d9ab54eab6e2262788c34f5e12b10e622d81de5eb93ef69742aad. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZZ8A2417353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b65d9d4a35a1627c4942be983c3bc2bcb23ccd77f441723a23d5e344172abd5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZEB2416398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785a7b8af8b1619a60ca3926e666da03d94778a2387e9b5e8738cf3bb944900b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZEB2416404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3119ca0923d48a57eaf036e399ece8cbb555a1e37acc2fcfaf621b600708aca5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZEB2416406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdb6d49235d9ab54eab6e2262788c34f5e12b10e622d81de5eb93ef69742aad. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ8A2417353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b864c84d3a102cbab97f0bd5e3c89d82d545a1540ebbdacfcc06c26d1ae0b88. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USLZJ2415996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ca5e0307cad17d35b54c0003915b825f60867a32ceca9d34f2a71934239d1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:59:17Z), 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/QZHN92360554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb418db91e73d496a6a544359415ce9179838fc99142bc75b7c7b2df289525023. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZEB2416392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b65d9d4a35a1627c4942be983c3bc2bcb23ccd77f441723a23d5e344172abd5. 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/QZZEB2416398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785a7b8af8b1619a60ca3926e666da03d94778a2387e9b5e8738cf3bb944900b. 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/QZZEB2416404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3119ca0923d48a57eaf036e399ece8cbb555a1e37acc2fcfaf621b600708aca5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZEB2416406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b864c84d3a102cbab97f0bd5e3c89d82d545a1540ebbdacfcc06c26d1ae0b88. 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/USLZJ2415996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ca5e0307cad17d35b54c0003915b825f60867a32ceca9d34f2a71934239d1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN92360554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdb4d01556022879fd040550d47480e4a8e206c731efc99e709be67f9cf2bd9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P2528132.