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 0x6abf6e6a014203136249940e2cc37db220dd238792b4479c2a733c1fc2ee4d9f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4210aade-045c-4d17-8f37-f09786efdd8c.json and https://artists.proofprofile.net/proofs/artist/4210aade-045c-4d17-8f37-f09786efdd8c.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 0x44f9274a795bc6f446661d87f044dc9b4e4dc3cd4f7ecf42b8601966064a13da. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ES71G2406024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc886879aeb78e5c5bf4d3bb94b5d1a97d8bfa6dff75d5f65e888cfe0116867b6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES71G2151804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c1028a3a1225dbc3c9fe3c8137fb29c91990483108a7847560dd5e0e54fd62. 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/ES5022302716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddaf9100144b974a0edf05007bda72e9a49035bfa50359520e92323b19d2c01. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJV2026135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cf76350b9bc29926d96ca1f654f2f55bdb04606c5a2265e58d2b924428d65. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/COGY11400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100b20c39db4aaa723ab8a3f9cf392037b6c3865b00c4e3cb1d4a9ad497aca9d. 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/PEBQ91810534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e455caa25d54f9568e1c50b2ce5ccb6a3e76cc1958b4fa4b7f51dd27286644. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PEBQ91817005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68c9edea5f0646495974d7e8afbe960818f988fbf87b041ebcbf31d25d60518. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SE5BU1990386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f14a2cbe80f82580089dc5b3d6062700d8c3ab16bfec87421baaaac23fac40. 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/QMFME2421427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e6967989e8f8707e2a4ea913e52a01b8da8859bb5573c497a99180130f92a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME2340514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b452d1d294f687f42f92488e60856607e7f9ca7bf952ee735daf727b69f8cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62370402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5e6a1e0c9abfa2a3f066a02c7cb317f429ea5d6356b43746c91d35afe7a1f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62276556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e523f7cb23ac20202e08e8f3f6aff9432a77e29226e4d614bc609e2e93e5f1. 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/SE6A92057413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e620d2e0749c6a18ef02bf795e752e4f1e244e9ff69cf683941b73b62d7d4. 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/US7VG1805507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a4fa1caabc9267edf1ea38209a48e91d95c0e6550c3800e8048bcad416deb0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR8Q22101015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f9274a795bc6f446661d87f044dc9b4e4dc3cd4f7ecf42b8601966064a13da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2406024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc886879aeb78e5c5bf4d3bb94b5d1a97d8bfa6dff75d5f65e888cfe0116867b6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2151804.