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 0x711150ab934ff680a206151610b372ef30e93c44686e884f729e6d70e17fc8d0. 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/33ee2391-c03d-4c7e-a383-d4f5ac829e8a.json and https://artists.proofprofile.net/proofs/artist/33ee2391-c03d-4c7e-a383-d4f5ac829e8a.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 0xa4a872c09f864ef32aea4a6a7c800a47668531abd033f4fcea7747e54e059666. 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/GB8KE2408610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0ea2647f653ec35d16cd5d6852b6e42c1011a2e7957e37200638836dfb0700. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB8KE2408609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efc3ff4d754b1871a5bdf651ef224382ca914fcb46c5855a4cd8a68218d1452. 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/GB8KE2406204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efe92e1ff83413715e07e56bb1cf4d173edc3db2c88c831c09eac79ac61b53c. 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/GB8KE2400856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae330879f9aba45d2505ebe069fdbcdacb135655659100e61ac1c4e729824510. 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/GB8KE2324206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68ac3d1ee61ac3c7515b42683ef29a7da60a8932b4e8c879c08b21dc6fdbe35. 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/GB8KE2317151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6712a810265b66c3835b95a7fe513f2345d301c07645d72df0f137a98bcf54. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GB8KE2305939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61d020017fd06eef2e1a17e0203a622734ee1ae6bc9f97a30da41196f840cf0. 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/GB8KE2305580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9671fe55b77a6c585157030ad0ff96a26c0e82259dbff277713cb7d4432a8f86. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE2305940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26450c894e456f402f72753f7b9e2dc0b43406103556edf864cb47950248bf90. 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/GB8KE2305941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4fedd85aeb6da0f3e17babc339763ef3eee3aaba04257c09e5b121b8d6eb11. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GB8KE2305927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509c158a97bd0c075a9123a2313f528e89d7a82fd53f514144b4f7c0521127b. 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/QZNWU2211120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7337302b61e96f4c1ded2cd3557c90edec16cab93b46c056cb7791b40ecab7dd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6L2205551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298d64ff32e9ad70320822133e31ed980d96b901b9f9afecb546e795e66fbdd5. 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/QZES72243932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf84101e7c027ce371dc4b0a9e5391d0c5f4e3ba47b68e8fd9a408bf5ca6bfa1. 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/FRIDO2414063.