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 0xa65f4b4928a18bc22ab12724255df10dbb5b5b04273024d08efc5f4496546bc9. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c6945e7-8c33-4883-8fba-735ea9769d47.json and https://artists.proofprofile.net/proofs/artist/1c6945e7-8c33-4883-8fba-735ea9769d47.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 0x6d81f2f8acb4f15263ab2a1d5099e720cbe71fdd6206bf99e9da6ddab24cb800. 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/TWAE31600252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6960a7a12286c1b0b75ef4fcfa9b448f9d669aebe8a6d061349d1941cffcce0a. 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/TWAE31600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804918e75df318a0084d69f03abd86d9c17ac6f69b553cd2e78d6b0068157e7e. 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/TWAE31600254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b5dbb9e6ce1127daa4ef674a01eeaff67ca7e82b8d9ab3bf1e70010dc86776. 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/TWAE31600255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1a883d94e44b33fc19f62b7ad0550b78fd2303ba8229e069e66493d81b28b5. 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/TWAE31600256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d4d16eafdde6e3acaf3b8094a330e873239520328a6c407da7d33494cca91e. 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/TWAE31600257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee32cdf1bdb67cb43aef8615a78807aeec07eb8350f780e0997d82b2d7ae0a78. 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/TWAE31600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1636209f761d8f6c6149d8c34563b2e1b61b75693f4976e18d2d7a3b04ff8806. 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/TWAE31600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206845d2b9d8d8769ef6e2f82da2296c01b296cd129ebf43eb87fd5ca3a65872. 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/TWM671391501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d5e1bd4bcb94b16bb8286613b8de6d62a38c8bc3f4773e3a3b875f0fc06d48. 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/TWM671391502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce7de4f6a39d29b07b45bdf5e18ef377aa14d8d2f29c57860fcace5cd5aeb32. 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/TWM671391503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8129382f4e79f5525c02282858697b3210cb80746f049c8d68c59a08c0cce2f3. 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/TWM671391504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5384be97e8d4a12b558b9d6bfe08e10d45e7d339426e04850dac5e8810fc9d. 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/TWM671507001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0099110c490d741595d43bf1c9c8e941dbe3eb6fd76bda101e1691723c8cbfa8. 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/TWM671507002.