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 0x42ac8e4dd9f831e55fcb577b4470f7a746414969feb5f8ecd9a36a6f2d56e5a7. 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/3f8ee093-8337-47cc-900f-96f407aabb7c.json and https://artists.proofprofile.net/proofs/artist/3f8ee093-8337-47cc-900f-96f407aabb7c.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 0xefcb4ae1afca9cb31baeb3b02fea8a561fc9b328fcea3e2c3260ed4799cfbdc3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAHH2326258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74d397dccedc1c3048afcc2da33997899b17f892354d83ad70f37338b020ea9. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:22Z), 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/TCAHM2361813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceb1c81129ba77758328eed169796473c6ee98c1cfda13b5323c551b5cd913a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAHN2359111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf510783d86a25df55f323acdf3ebffa4cbc825fa37c1aa23f7b52b8d0ab3b8. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ESA012416328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5764182dee5e1dbcb22c616de5dcadc210b03170e80a56e8253511625e3f9f. 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/TCAJB2401443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca26bb571112324d1e54f8e46828b977d3aab392cd8f957e677aa496cd3cc61. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJB2401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5796e9eed81acac2c932341ced2b695dc721aed76b2cbcbf2d18d49f454ee5c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:33:49Z), 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/TCAJC2401456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9301c518493fd4579721371f8db90e6c8ad020cc20cfee40414af30345ebd108. 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/TCAJC2401464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6f4239035937f8ed178974f814f5762de7e4264b12cb6f4cf2dcd28e07be1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJB2401478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bd1499f55f041346db6c5eaed2a0b393528f2c038adf97d27431b0ec797805. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJB2401486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159f08d0d093f743ac25a01a16104cb128e505aa38c52c28647a4af90147351b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTPX2525143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431b9fdec6f84b81c77b160c7f2d53dfb36011f27dca339aea93935897b52bc1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:53:31Z), 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/QZTPX2575609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccaff672a68c6924dc84c116537d273917d98712c269ba2f7ae40cafd7471ff. 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/USA2P2458197.