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 0xe1b1035230d363dfeb99c081aee1d08fa580fb2564b1f59c309fb3ed16e38d22. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4716d742-78fc-48ff-a8dc-b6f839629497.json and https://artists.proofprofile.net/proofs/artist/4716d742-78fc-48ff-a8dc-b6f839629497.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 0xd8218ec38ce35f7e2f639855ae576769346126302c2419fea7765d44c1400933. 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/QZMEM2125107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5360108f6eede1c16d1f283c34ac9af28839809b4a6f4d006e21759124f56f1c. 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/QZDA72220397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e9c38e135aca21ca0915eb2fed4820d60b2b9ae307825114155e18921e4e69. 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/QZDA72220404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64288539011b66ee371c1ffce7615478ef8274554ab440943e5f40542c16a1e. 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/QZDA72220405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7ee72e7c02a1f10ef97c4c0e50c07c9d1491079fe4e9f97f52c30571942db. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA72220408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2c50edb75c509517d2a374922eef29af62071253bb8fd71dd86aa32da8283d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:20:58Z), 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/QZDA72220396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477760a164254c25f572ba599072d8cd9093330d6e3204b1d004c4430ab52e7d. 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/QZHN32170789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ff8bcf473b52f203bb586344630050ff4c9685926f1bd3f1b21f62fc5a4811. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZDA72220395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa316dc7a4119e9508aee98db6e671f4d80a25c98009cf393cb9306767081888f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZDA72220398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599abd7be92d2d5925fb43a21e69368a2c93f93756ba15849364f35bbd4ec2d2. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZDA72220399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b61c43ce47ba1db880c0e19de482798f0909fe12d11d33ccb2a4d54d08b3c69. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZDA72220402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b72787ff1ca247b8966190b626788378efa744ac18e00d41e39241b3ac0d7b5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZDA72220403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe20040de12521c6def3c1fa7ef20a0252127e44d1f92d89718d985240ad5421. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA72220406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b326b036bc5ad3c23a8a024d9509107555fd65c0f734d0026da4086bd836701. 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/QZDA72220407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5246102e7866493ac70e037209568eb20de9e88e3bfe0d52cb1da12c6da3e9d9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZDA72220409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba28a91c3e3410054f775f5c56faac706f84f4ec408526619f3b7f95a24f3d87. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22255211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8072027de0c568b0b97565e75a28823dd77d5633f6c16f3c9d3395c21ef693. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB22255212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2576e954a28c27af735b2089614b353c9434b1a64361722bb960572eb77184e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22255213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe887b0dd52e1d2a26aad9bf095e8d71f0dc9ba8dce0087a8071214d6ec2e6a22. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTAT2296783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbbca509b32a6eaae8eedb2ac749e4848b5aa7ea918118aa69d9c54b3a91516. 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/QZTB22255217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f141599c8558dd128460de6455613466c166879eefc314dff6b895c17a8504. 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/QZTB22255218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1750ac7adaa582b195cecad17fcb72736b8bb08b94cc327bed92fb4538b8cdf. 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/QZTB22255220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496571afbe0710222d1629616dc646a8551573986d2c0b76820d7c43f78a6fd9. 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/QZTB22255223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba360d64208dd318b313bd88e8566054dcc173fa45a9936a8ee75d5068ec4988. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB22255224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a1e8faf6ff67c88e73aa79e2c2f9d1f272c689b2505b33f6032a0f599f8160. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22255225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f78a94bc5121968c7e0ebbea45284c831924608a0001438900e14069bac205. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTB22255222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae618f507567481aa7cf12fcea3b03db2de88e0af7f7a5b1b214e532664bc3b9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTB22255226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f400f696f1bd8e9bc5ef378b27b60e25519fe8c5989bfd1c8ba71524c4582a. 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/QZK6M2422429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b933eddb6838dd928a63488d15e5cc1f7959f35ff13fce93d8503d89139a833. 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/QZK6M2422430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bc996b9f022fff1c8107b57fb8b5cdbf9591c557353bd95b4e94b7dbf52f8d. 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/QZK6M2422431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6739f9c355c83386709cc8a6c849c89355e674f11d2a44c0b34014b0feb4d2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA42439362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bbeec967209cce8a588d23671b1310b3628c23a2a55f0c9b83bf0c09136f8f. 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/QZK6M2422434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aff2c7dc50c81e6e0e36115802d9e10de21ceb18f1cdf272f663f782838473. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZK6M2422427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4995c54c961955e56e84aabe739d8cbcd243ed5f283ab400fcebc6fe567ccb41. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZK6M2422428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ea3f0863707c57a330a3ef7c19815e9a2b95024c4b633a55f8adeffc617112. 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/QZPLR2307088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023cebac8bdc28fe8525ab1f8970ab1d2e8344c4db1fc1ef7831f68c5ee6b06d. 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/QZPLR2307090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a0219f74e094bcfc80c9a2178bd8c3757b4d5e411eabb302929cea5588d676. 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/QZPLR2307092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b20a22ee645f998e6f1c60f4aa9a517886fed1a9b5d152b70565c9c58a64f96. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZPLR2307083.