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 0xb20d6fce5938cbc6b8e72448196d86b40b7aef5aa38523cc0955743b546b9aa2. 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/60b8ffcd-7bac-45d7-a5e7-048510c4789d.json and https://artists.proofprofile.net/proofs/artist/60b8ffcd-7bac-45d7-a5e7-048510c4789d.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 0x9735b9400ea2bba34ce077a81c3de21950444ccaf961de9c70d09fcd6aa65ac8. 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/NLYK91800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec1b19e8b1089f7d9020d5fb034cbc0d4ed1f2d1082b16e64835054912e0b9. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/AUFXV1800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdbc29013e74c76f11b182f0613b1be64676233d39aba7871310a66d2d4bded. 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/NLYK91900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c6b57bc7fc2cccb2d15298077d145cc759c569de391a03fc5727f98df7e9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPEW2444197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6d42502153c8073380ca44aaac16aec0f0b4a2ffeac315660c42fc73e6a2cb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTLA2489658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf8cf90f2bc651c06129f6c1e5f2035bad59c060490a0e4939ce349cedb7bd5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2407912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91b0051092c38f2c3c85583f9d97c7dc4dc6f07befa47ba484b6aec205557c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0a7450b5d6d6745e9189e272e751a7a03fa88dca3b2e1011ea4bb230ea550b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbc4d164f0864c3a038dc0256d35408c3488e0dd883eb4c186465ce475f5b96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45bd6a3bb45761f1d4b8e014591d45f315de8abec3a5ce21ac1de5307ce6ca. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT2VB2461885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fdfd37f93abc72b20294c1ff61695a4f64a432b1e58021c3a63158b74cf9bb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3726560177332a8da75f86d97a61b3f780bc0f1e297fd6c0403431219cfb6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c194b86700bf65bbb94c6404676762da84c84b2b22e8de06d425c2bfe0b45. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT2VB2461888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c32137abcd6de9805326f9bb72c294111830f49e0e445667cfacfba6344dfc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT2VB2461889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b22cde49beac6f97888153e6471874df8c140a5da9e86754f9c2fc9f37abd3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86748ac94170a115a2df5d8c6f8c73f09da2ded679bfb389ddb0040d3a41ccd4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c1a5714f6e926d9a85d3fbe3252df232e5b10673174d72a9bc59b230c0b4b8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT2VB2461892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24347840564e8c45bb5c6ce3fbb5a2460e421044ea59495856726c8f314c9812. 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/QT2VB2461893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288c4cff4d94edb0f214bef632e0307997649aa2af6637bd760ca54ff0e1fe7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QT2VB2461894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eb661ab22ec27640bf1efbebd5ee1958f5d8be34a443a697f69863c81eeec5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148613920550e7363ffcad41a689c081faf86397b8495501b0ac060981660b10. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0bbbf5defe851a87e23ae63f7ad6c715c19953d7430e3265f6cbb88944ef3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a41d71b1cd75aa1d0b4d84ec4224ee45ff440c9ec76c9585e1eca7052d8e36. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffa9c2bcf97e56a311fc1e5db330b9c0cb1cd2407657e2e9100a29894ce9df7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38aea7056195be6cf6795b348900f17abeef2f09088e5acbd4c0db7e7dabcd7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c6b57bc7fc2cccb2d15298077d145cc759c569de391a03fc5727f98df7e9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPEW2444197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21d9a6126264eed53c1b8f29e35a97284aacbff35e70576fd1acb2168515a4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TLVEM2468766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b870cb629fba8e25f69752ba9c53171778140aca8ce765755ae608a17961b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ebfc4c57a6ab1223bd5923d1410ff877e200874b8072b7dcc117eec4dd37e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d0a3fb52cd00e0be12c5f3ba2d8bd09775462324380b444ba17dec4f0d370d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT2VB2461903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8824510ea0184312337278e7fc027caf82fc4426e0e15a1ba0ce57b2fccff3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2461904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ede043804cec37e50553accdded12cca1e011fbeb72f10c0153270f724050. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QT2VB2461905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f5135204899c6cd4adc51f06a697b5b1813500c44906796cc8da592df9e9f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:35Z), 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/TCAJG2586093.