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 0x941946355c213129d548a54a83f4f1146137ac42c36e4c37f7b5ba5b3498f1ef. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f438528e-a6dc-4b82-8c7c-2e18a98e7fb6.json and https://artists.proofprofile.net/proofs/artist/f438528e-a6dc-4b82-8c7c-2e18a98e7fb6.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 0x82c5bfe28751c3c52c1965dde56e70c8043cca8c315ef54d23eca7cbb82fe553. 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/JPKI00408258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016b3f6f358596e9aacc9bd0c1e9b67bb817f20b7e3b10af16cfa4856ae46af2. 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/JPKI00408259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdabbdefac087fba531af6f230ed76ca870030bb152a63384b1150efb9a9c84d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPKI00408260.
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 0xb2cb0f3c763efcd9367e67d9066180e0c16a58a720f16a087c52d768feba1570. 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/JPKI00408261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adf4cb01817a84bff87fd3aab0213b60a7b7b24b8ac93d277d0100a0026a364. 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/JPKI00108910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd34826072b56d2f992084cce144b2d0e81ff1154f9f005b039aa93b03207dc4. 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/JPKI00044920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900b71dc702c94d5b477272910f4adfd6e59a3c5a1bac9d276c730bfb1845c9. 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/JPKI00312422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6550ecde24395a28fa9fc4793bdddfe6ba91231b93f74350a3e7d7389936fee6. 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/JPKI00501613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110aaab29576945301123c26e445c24fa83eeb47e9b7d541980f3fc6216843b8. 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/JPKI00307826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f1c279432c3d547a6ecd03dc44341d27ba581d80cbb1133979abfafd97db20. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:07:53Z), 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/JPKI00603267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4cd24b1ad4ad17195c607ea3b324a0830480fa75fb6553ac0acfc9e9800b2b. 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/JPKI00307819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3109f50f2e65e20a111ce54d99f49bf39d461de6a06581e0e0a77deed90f5fb8. 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/JPKI00702461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d51c5c88d4d36663c6c4c0f0e47e25e8cd56973d72d95868f670123776622d. 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/JPKI00225312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8def9c79a43cb7f793042bf9f8f7414033a427fa97cfcfbe9754f0bf2180f2d9. 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/JPKI00706833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb7f84ac6477ff0c1370ed2c16604f8bf698fa3e0d5046b517293505b1c8c8. 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/JPKI00403570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7733425238d4793f0b1e558f6bb3ca25f4b4f3327e75b5de487b7d68f34cadeb. 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/JPKI00816086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb30e0bf33b297e397ea0cdcf37ebf7578bd0a7bc324c8420c10c81cfdf39c1. 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/JPKI00403578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0c02e815c9444d237123315ea5a861599971869458b8a6290fe6be249521a0. 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/JPKI00818171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c39d3155a82945dbd4932329a088fba171610d8d70bba669b7ff1d8efb9fbc. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/JPKI00912852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e632c93075ae122c5e4ab24b721b9d91f3b879424020cd44adbdf9ac197a329. 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/JPKI01018906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf855102a38b7a1cfdc0fc814f35155f3a2896966ed72d433250e54eadf69d4aa. 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/JPKI00710674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ccd20f81f11ce31e30ecde60dcbe3014b4f6098dd5154eac8260c680f2aa62. 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/JPKI01112995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864d14beb6fb8760e64a543c5f3f1943370e31dbc968a02cf47d29c3016a83b5. 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/JPKI00912559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eca8d69047c647c7dd6a33792734b12b90a26c9075531a92471467629e082f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/JPKI01119142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb794ea99223f6e1096c436b6923793e60914d8e3a3f3a8a62c6d6cd4e2e5a87. 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/JPKI01213789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb53624480522f7b0b564c4e09b0c9a1686b9d451cb3561a3436eaa15981159. 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/JPKI00810630.