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 0xfff7b46acb95b7a602a00540c1fcfc70086f7e8ca425cf503c7e6edbfc47bb95. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97438743-2860-409d-ac58-c0fff41db3ea.json and https://artists.proofprofile.net/proofs/artist/97438743-2860-409d-ac58-c0fff41db3ea.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 0x5fb4dcba1cf73a6b558ee2204c84da4b1df69f81c4b496163ec6052e3bfc11ea. 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/QZTPX2461379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617213b9d4bafd31d7c92a105ddadf14bb88c81fb2e13c6adc98023d57f1d49c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTPX2443966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966c6a5770ed41c9515a944b44f9fe5c17ae1476af57a700c368f71ed3b9884. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTPX2461386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b93d8626dc13b0e736bd973e6838a232858a17010afdf0b1b04e12f9339e72. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2520128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf09c8d0bcc4f3c5c79a98866fb8c63ca4ba085c5e48b316ea148dc9c41b2512. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BK4DA2457628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd16389871aa64af77dae7449f3a766b4c3ef664792c21dc683feff036c936f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXF152401139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbe5c204be38c2f363ef6f6193eae27f94f5292e0636a7cc6777480084505c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2494531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad3c9592db5af1934a4cf41a41106a56341c2153ebcb3a6cbac7fd8f9f5c92b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92497883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1784d0a3f020bba6e196419fb59fa21e2d05fa5251ba916640b824adc327001e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG2458545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f0c92d54fe0643a48e084dc2c7b0499e0a48b97bebf1f2e8c099032269166. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2373836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc793af480d806cddf9bd02ae0ddfb63006c78de90e7977d7fe3884ec3bff6047. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTVM2328450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa323648bad9c48b5585ab989fc51f20aa3e821457e3df38f7eee429fa5765cf9. 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/QZNJX2049220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eaf43b569c02f960c92c7865c2ee669e98a3641fbec5d5e470805d8b9a1ca4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ4JJ1992390.