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 0x23a50fb89813197f1f3e382a261cd8fc6610d54885a26a24edf016441e7f232d. 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/80f2b6ea-f56f-4e09-a9e7-3d6e25928cdc.json and https://artists.proofprofile.net/proofs/artist/80f2b6ea-f56f-4e09-a9e7-3d6e25928cdc.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 0xf284f85d5fe19d46f0930dc148d787daeee3101f0600a5030856b828d6a052d9. 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/NLG272306810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b0338b7be87e99aaa1540fdb281fab65d6453b38eb8cb68d24118205921510. 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/NLG272306812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6088aff2c789b62df69b2ff709f90a13c7bb1ad7c953233c65e9000294988534. 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/NLG272105000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25a0511a43fc1d2f82c0c79f9d19b003964f651d2d7305b9301ac1e480c673. 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/NLG272004791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586520b0d38b1d88dfa161b71fbd08bc1e0f4384f75115f96662aad605268f70. 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/NLG272306948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378fda8eeb4d74b02971d0fbd43300298e68e0e0e9ff3470901bd96e9477228c. 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/NLG272104948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3cba7a6032f76d65d3a106972f6dce2cc242891ae39c64e64791e0fe3a9fed. 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/NLG272206525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25a0511a43fc1d2f82c0c79f9d19b003964f651d2d7305b9301ac1e480c673. 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/NLG272004791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aea21bcd0808037189d27e4a8d413508d5f8f9b4006827fd916dac50b5bcfd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLG272004817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5e8d9a7d65de3e85b841af1482e6a114d16f3833d827b94c3952a9614a221. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLG272004728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8323247ba319c145d1eb0a6712b8e30dcdc062ef787d37beddaaaa65a9641e04. 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/NLG272004636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5364f67fa4b2f4b31ddd6206b713342e54643272dd768287a73707607d10d24b. 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/NLG272004900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab617a2ec408e2111df8734e794c6ee2c31c0ebbc2dc6259d5b3a6860943037. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZFZ31961415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9151f9a10329ce0f6aa65f0ce9e1cfe0190fd7447216b89cd9a5041a054450ba. 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/NL8RL2461016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfc3593d193f82051601ddfad533dd322a8f363b6426d8bed3519a79e57a937. 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/QMFME2482180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f11ecd865980fded1d83022ba46316650d67b048685432b4f116df609c543f. 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/NL8RL2434783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c13182b374661ab1d82aa81a934b321a34127b4e48c21b5af6fe3b062652a0c. 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/NL8RL2427449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e06d0a8e697b2f965f9465bf38f5375f03531ff85bb71da377a15964f23f2c. 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/NL8RL2414703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03087f181cbfb2576c20b346f1ce44878f8cb656b503b05c35905158cf9269b7. 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/NL8RL2337719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74d80e5eb046ebed23bc609cca4f58cbba51fdb3596722051352e903a6ad70a. 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/NLG272306828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f7b6962536bc132f251bffc19ea4578fc1dfd2d723bcdbedb921e57a89dda. 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/NLG272306800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0267c3d7e113a38f82fbf716fbd95b200868adf28fb6029e2d1b1c06905fbd. 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/NLG272306619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf399226b66bcfe4078e966922e24eabcb0f65ababfcf05766971cbab9f2b6f51. 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/NLG272206541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7202ccb34085c0b1c4ce6050727e053f77cadc47d081532db341b11c3a76b0e7. 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/NLG272206543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfcacf5da0cc2997f99f33f8c173c0dbc4ba26b42c83adac19d79b80d24acdf. 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/NLG272206520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61a8cadb0c4f3970b7176e4a93ced93ad3ac15332a5c4b715a6d6faa7d72696. 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/NLG272206416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf9e86d7b90ded7dd329d16b7ea8e7be865375134b177ce71abedb54cc225d2. 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/NLG272206139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9c2c2b251edf8b2a4dba55d85207aafabf2310a5bd879be17ddaef9e6ba5f6. 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/NLG272205804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cfdbe8a242763590112cd7a542505dacd54449a94a4f737d78ee7d50f50f2d. 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/NLG272104994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdda523d8fcd96330901e1811dfefa6c1c1fa6f6aef0af7548cf30c01f399cc. 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/NLG272104975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a539222823250f4891b259ca5fa8aa24860e621ba113e0c4b2bb43600632317. 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/NLG272104959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5364f67fa4b2f4b31ddd6206b713342e54643272dd768287a73707607d10d24b. 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/NLG272004900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aea21bcd0808037189d27e4a8d413508d5f8f9b4006827fd916dac50b5bcfd. 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/NLG272004817.