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 0xfccfcf548557b87025e732c2f2b4d71a23ad9cd74a6ba0738101744ea374c7c2. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03b1a1ca-51d7-41b4-b741-9ccc5de37442.json and https://artists.proofprofile.net/proofs/artist/03b1a1ca-51d7-41b4-b741-9ccc5de37442.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 0x89dcba11ecfac60614b429ae5392e73485ad187414298d6d603214b8fb3f891a. 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/QZPLS2419617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8e3d15e010ca2a5cceb524a4a7d2ea057549383c2e63414232a344aa4b76f1. 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/QZFZ42453356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a82d4f36f8c341871c7e24ac693477f509c502c70b8a9f5d80a6f6f513a64. 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/QZTBA2385285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a78a0ec22cf314a9bae54e70ace8a57e6537e85998ac67a6f1a2fc8833aa33. 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/QZTBA2397543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1173d5484b5c36fac1c793858a02e4c540d80441b2e30fab3281427a3e6a44. 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/QZTAY2329042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f9bd4dec31ae34434c0b8502c12bec79580e887c9fed4408977957f1974159. 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/QZHNC2311309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db508b0fdd3e168b0f22d74d0f70cbc1ed162457655a60e9264fe04d07b0f5. 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/QZES52391924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b58c7c96544c8ef2231a66b6201de612baf92f4b7c7048c7ecd94e416e5663d. 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/QZFZ22368235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6994ea86478d9adc0eb8fbb65b94d0e11847810fd9925488afea92bfabc09b. 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/QZPLS2271191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6366064c1b7f44321b199d4e0bd91cf24da47027278813e6d192ece573a47802. 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/QZNWQ2233838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88969c0a151193be59630bc8d301da3e69bda0cf2845fd9a6a2cbea7695e92. 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/QZK6H2235640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd823177c0deef3820ac36e7d23cb49729556dc5a73115a35d1e9c81ef221d742. 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/QZNJX2275923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd467c314c3588cb4ea0dd5200b59031c6853ae7bc2b39a9499e87818cd7f4b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBWUL2404803.