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 0x377b1a4f7fdd61f5a68cd081a59404ccd93316b70f811d276e325358e423644e. 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/4c9160ca-5cc7-4d8f-8fb1-a2524a8f0a04.json and https://artists.proofprofile.net/proofs/artist/4c9160ca-5cc7-4d8f-8fb1-a2524a8f0a04.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 0xc4779bc119d1fd0d2979d607f8422eba6264233eba8801b06b016ec3dcd7dece. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKI492308201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce90b5fe884744039d4184f4b4f4af9bb4e85032190f73fd42b8cb89303d5d4. 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/HKI492307203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf046098231c871c2d6fea7346b4765ccb511019eddd922cfd847221bc0f6b143. 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/HKI492307204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc926e61e27494a94d5d5dff109cc8e5d62b53b4fd7f2deb24a7880b38d3c1f. 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/HKI492307205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73243d84b9720e948ada391e60965252dad705967afaf640125687a6b5db5159. 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/HKI492308203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbccc6c5437cdaa4c8c108d7ec4c8ad86729fa1436897d461a378103704ede89. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI492308204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488bfe20a63f5fec2c71885535c41f68d9b73126f2ff74b7f6ec75c420bc56c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI492308205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b49800461593a9df3751605cb839643eae2d1ffe7dd63d213012494fbe05be7. 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/HKI492308206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee6460a1517449ad96638f2370a1b5d558fd15f0d8e4f6db031b3741fb4c8c5. 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/HKI492308207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69523e8c18670aebbbad4d1f0308716dd20afa3493b4c7068a98323ccf0db218. 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/HKI492308208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977bdd8f534ec5928ac5649db7297fda99c4500f1f63553d7e55718f56f179a7. 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/HKI492307209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43431710bd1c9159b6d7a9e0a45b9b2185b1ecc800063ca4d47b632571aa4494. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI492308209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e00ebae4e11d0e9a03ad577d04935f16b6ed5b79bf5678452c45231be4cf9c. 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/HKI492308210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cc97abb9a2e4635050e491ac21ab2c888c8e114c7cbc9719fa99f8eb14a847. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI492308211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34d0b22879d049571cb7c0f24b60f151b4a4a6e0bab78d1b062ecf9eaa83619. 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/HKI492308212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2855395fc9730aa129ca582c45e805aa10e31c5c508d45c4c0ce66feefe8bcd3. 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/HKI492308214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d36bddcbbf373f9fe55ece7f1c5d132d615f52a20d714312e32c850b5a9708a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI492308216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b5749802d95ea1cda51b139b5a5acde6e601bcf4770489b919bc843e941d13. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/HKI492308217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3fd9531acc48e82c934de5193992c0ebab82b60455b3ca5e472351e2880d59. 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/HKI492308219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8773a5f39dea6309912034334a7044bbdf34c77fdf89dfa9a778f3865704b996. 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/HKI492308221.