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 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 0x1ac9dba6dcf30bbcf12e8f86922d6d8bb77c59c2b03eb56d42fda73b58ba5db4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32cf48b7-2120-4f74-8adb-fe52604e9232.json and https://artists.proofprofile.net/proofs/artist/32cf48b7-2120-4f74-8adb-fe52604e9232.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 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 0xc88b7f78553b16a23d141fff99907094a046570344ff405168963c4e8e867eb8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USSZM1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aef47ef7e36cc6bd41058afbc7c98befbc760f80134756a7e0c71618f7058d4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USSZM1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf497a5987fd07ff96785265117f8da39ecf5c8b147c452599f78a2afbca7ac. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USSZM1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8969879ae6e1c3007d9f28bbf8fb4944a1c5c1ad1e373489f46954ba9574a722. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USSZM1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedf2b8ea2882511400a6e2cb5018ea1bbc6cc961b004d36a4b510d8dda2d716. 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/USSZM1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e434bacbd9d5f8156b4126502f0f11976f2d48f2eba2cafd8cba9d3a3b4881. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USSZM1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684b317c73160d9134c2ab5da94026945176b0ac2bab8b9d0450b9b98f43e541. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:49:02Z), 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/USSZM1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12a1a72989a53db9c1d6f7b21ed41e895eb39d59c7d86af7b80dc17a8c9c97b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USSZM1800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d0b82a987e3d706ff1be8ec61f2e4658dd0fd20c3732bdc0e9128adbd53e4. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USSZM1800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1ef39971bf661b7f2c62c960ec43b533e790e6447523a2e3e1dcaed221b257. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:15Z), 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/USSZM2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a15074e3f3689edb4361349544e7dbce02011a2b563b025a122b456878df22. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSZM2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00cce6044a64cd39ead32143b8c9df1253fc602880d5fa4642a12af196c8873. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USSZM2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aef9a92e69e4bd1c5fc73067727a0e97ce6cbeaa1bc74d9cf6b420a2a3bf30e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USSZM2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee267beed403ba95c5f43a0caf93f214b64dd6f536a4b5f61c41aaa71e16f46. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:40:26Z), 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/USSZM2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a9e115a1948ce6f391912a837b9563750cb6bbf9d9a129476a33c48db20b8f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USSZM2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d09db5070b221d614edc5a999fa3c32610157abc9d602b3aeaee14903ff1fe6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USSZM2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a9e115a1948ce6f391912a837b9563750cb6bbf9d9a129476a33c48db20b8f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USSZM2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962bb28749e7e6af6261255dcb7624f982cfa5e77597aa98ddefaee45bd8e0fe. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USSZM2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c9c27727184d62099593c7f415982456d031c6397733a1c7a6a75505691740. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USSZM2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ad0289d57c31d98d9eb20eedebdbd4663886566fd490d87b1543c731e4e44. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:38:26Z), 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/USSZM2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f250e5e7bb9c94e8edfb4a9e8b3a56d8dc405481a21cad1c7923bd9b1da0f80. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USSZM2200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962bb28749e7e6af6261255dcb7624f982cfa5e77597aa98ddefaee45bd8e0fe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USSZM2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24f8c99658c49bb2ca77926e275bc61d9605071e4095e2f447fb3101af607af. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USSZM2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda20a2f5dcd13afaacaf830ba1966c75673f18ca83bb8fb566efaeb4f2425955. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USSZM2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8140a7d06e24ef35dede8bdd5d7367ee67bd8484da852460ac64377d7fe66b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USSZM2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c9c27727184d62099593c7f415982456d031c6397733a1c7a6a75505691740. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:42:48Z), 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/USSZM2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45710d8cb509ef5f1aa0dea296fb19c5de605b7109a3a7d8a1f1657cd275461. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USSZM2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1a710dca20e1c09178b0d6688c54d599cc6e6b92f062f2d89bcf8d0fafb7db. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USSZM2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82223a83c46e07054f0215a96f57088b5154994aa8daf5a61d9b99010d8b6738. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USSZM2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89814173cecba30ce1a69a5f17826de18d965e6260423ef28e5ec8a7de9e7ad4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USSZM2200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e89e196cc37c88ef0413e08c20652e30c2ab14a114c9608611df99b6255e4ed. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:28Z), 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/QZGXC2300881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08880a0539026ced880512250a7c7a860b45ec9851d447cba988154fb5067650. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZGXC2300901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08880a0539026ced880512250a7c7a860b45ec9851d447cba988154fb5067650. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGXC2300901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf484ac519c08009509883a4b77037f839138334d636a9ef2ae6dae566c049772. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZGXC2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4533d33a8f1493e9ef57ab214e0eafd52df0e3641ba635ab66737b11fda389. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGXC2400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6be13a00c8b7ad3641fd5aed102748908038b4ec571fa7e663f55d1a5b6064. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:04Z), 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/QZGXC2400487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cf0a6b3244bf559ccad297053578dfb9e62d9a1dae3a155106de26772c0814. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGXC2400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dcbee4ec422cd10a212f5737f12b5191f332ceef1cee865a970ecbca03f8a5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGXC2400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf726914d494deb7905e0e20e28824d467b9ec6aee6f7693cdcd6fd9f9e3dc80c. 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/QM4TW2532111.