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 0x0de8932cba9b4dedf7dec53dcf52435fbbbcac49ce822da7656db2072bb35536. 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/e1d6a49c-a44e-4932-a8ee-2386af67e372.json and https://artists.proofprofile.net/proofs/artist/e1d6a49c-a44e-4932-a8ee-2386af67e372.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 0xa15af421144bfc6b4a1db1cd5c5d3bb134bee76e9811633791e9fed211610390. 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/TCAET2014396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd6e5eb756efe583d750aa5d34c1f5f059dea4997e6d074cecf6e2f0b0d617b. 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/TCAET2014444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c05613fbd731d185b0cc101a6d07f229531d3b8798a45da346fbb890302646c. 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/TCAET2014509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe36faeec267e7c553d428a99d515ca178d6f771fc0ca9871a6e208fd3335a76. 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/TCAET2014502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc9d5b2bc26b38adaad9de5488386f5b4be9d9bc0e99053b8078c360be8def1. 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/TCAET2015179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6db9a83d977eb417f82d91f548753ede49109a2dff1af62c74a40ffb823440. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCAET2014532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa595af7871685a9123e5119759e089cdcae4684d61d2ff619808ae26059548a. 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/TCAET2014397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ae8876dd2c1d3e21d623870ba37021bb1d666f25105628187285970357447f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCAET2014437.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7f90be26f91c886b6d70b7a7bd6470bd7feb8576a8b11b00559e4b40903800. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAET2014461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2291d0d24ca6153e47c65a76ba3fca53a25b44eb4c74b5f9f0c4b8c09a4d4a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCAET2014519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797ca1ac848b942f8b31043baedc174a51266059d93692eba92222391f36ed8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAET2014457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4c52d79e7bb08bef39bd18452273f7375f3032fbdee2ffaf377c4a5adca817. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCAET2014408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c41eedbbd2b19848eec99c52806cb209ced0ed3d4f060bbe8365161bc709c46. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCAET2015274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f7faa124cbb3e7d76cc1f4290bbaf782d1f14aac64fb45406c988219eb3027. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAET2014506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fba42db7a797a81b5b3dedcb84514a733c296fbc53b25aa4d6336884fe5100. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAET2014516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bd575c2a234a8570dd3e9c305adff5baf6d5f1fa32eeff98b2a989b660cbea. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCAET2014496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30d47537e19dfd6eef2c02b1f6d166607b785782d2cefa7d37191a853d1d7ea. 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/TCAES2020182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eddf568ec0d67d95c382a4bb896f6a65b8f6e26dc6188ae9a131f1132608555. 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/TCAES2020207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1bb2bd6a0d03aee27a17e9b6a17c669dddb81b8f8fe5bd946bad85b2f15b4b. 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/TCAES2020275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b576d5409c4ad7421edc227c2bcae865ad0d590a6e4f814319cfb8c56618c1. 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/TCAES2020267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b7d67347f33416095a995995eb667b2544ecc1e93b2e38715c78f2dac6de5. 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/TCAES2020218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5d14af6bc5e7ef3e248f2216cfc23b32dc867e4500d74a079801f3dddef9c8. 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/TCAES2020294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6987b0f3911a532bbb312bc1d031f0c411891f87a8e28fbb4d4952ceea862836. 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/TCAES2020257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9508b94bd56c21d88666d9fe6309626ba307aa4fefa04cbf3c206faf839eff. 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/TCAES2020295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb10670839b477647b3660652bfaf410ddb3404ddb13fd62868b9b0c1b0550eb. 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/TCAES2020287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f751766a871484f63f4ebd47ccd3d2b4423b5f881c34688aae689a05d710b21. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCAES2020260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f4c441368a4f7fd092e9c92492a09f4eb079977261d10c410c54d8270e4bb2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAES2020310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99425303e0cefd11434e5d889813007c605d931358da468a0242b35637cb7a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAES2020270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ac8be701dfcb8238897349d4ada44b014d9caf691d874dfec19eb2f1fc468a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAES2020221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50184e972787a008b8ff5fe1d33b132294c52535318935666441b8c2f3ce8ef0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAES2020299.