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 0x0c09e9e87515aeb2cbf7503edea55adae9db578fdd3ea7c80171f17cf9b01de5. 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/19a87ceb-3a88-4b74-a7d7-c421e29872bf.json and https://artists.proofprofile.net/proofs/artist/19a87ceb-3a88-4b74-a7d7-c421e29872bf.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 0x56e4ea5c0d98224e2aea708653e900ffcf01c9fa35ebaaa47e0f85634f1017e6. 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/GBLV62204527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62348afc5271983b082db9df0665691dfcd78ad5b698ab23c0916de06605f96. 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/GBLV62204528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd73d3dcd7571c162d2e08fdea3913ba63e90bc37a456524d48fdb0f6ea6da4. 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/GBLV62204529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69788c580f1d2f57494c0b35f386de5fbd3d44f8157fe764cdba988552f0598e. 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/GBLV62204530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af03b6e97992f647f6612766786bc6279bbed79ba5182d2bbfc9a3367b237c8. 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/GBLV62204531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cc9c55eeac48516a58c10668c144f0c1380f1aa7c106ced11cdcdebecd836d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBLV62204532.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b4f63913d9b749650b184a6a30bf7f394d38a2eac925952b0ed7b59e72f2c. 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/GBKQU2300659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c20921d2b3e595bd1a11323fdc6e4adc5cc673dbdbe7039888ee2e92c1c5b08. 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/GBKQU2300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0764f2cc20b8545774456894a11ae143e3a33073398799bec83f48bb34de087b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:22:25Z), 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/GBKQU2329065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cd35bf3135c64b15fbca2b1bf3a0ed39f27cdd6b32c08a3c8d450b2f90a26a. 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/GBKQU2329067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb5b2132767f4459b4aafe9e051009110355c295dc25c45d03462617c3cd76b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GBLV62308280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc0adcb4e4d853896d0de1ef94446488607f2c1f29bce0bd15707f27743ff31. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLV62308281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ae5152308493a0cef48c298036878eff6f7c2cfdd05d2a5950be80fd42ffa. 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/GBLV62308282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753f0cc176fa2ebbe98ae727d842a01e70e07d1a292a0a4b2257191e40096f11. 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/GBKQU2490659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3690ff4bfa8a20e5cffb1756d11a81fbe909a623320d3616fee12b5b8010d5. 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/US38Y2561597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c97211c8f29a2d4be5be2391fbc22d4685a73c6442c8cfa726b975193d4828c. 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/DEY472378237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a17b0c1fa4f457c54b4fd3d87e7a836b667fc96a2bfc887cfb63d0a0bed4a18. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBKQU2292595.