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 0x46977cca17874d5c0d67ebb9e719295a93d19fd2eb1b903c3c4dc3b55cc7c308. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64926e96-ce1a-4251-82fe-fa83f058df73.json and https://artists.proofprofile.net/proofs/artist/64926e96-ce1a-4251-82fe-fa83f058df73.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 0xdece1f22c0e1fb1b3c04b25a35098175d2ceddeceaa9e68162d96be421fec9fb. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/AEA0D1945157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f287122e6b3311228d39cf69e74f613bc14cfa76f71d212913dee9efcf18b7. 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/AEA0D1945165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395aa39e9b11c2ecfefff2ff7947e93ec03e77ba8b7eca6ee72bb552d8ec00b7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:50:13Z), 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/AEA0D1945159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d0a50732a2e49d8d324cd85411591493e50c015b98a7b047f7b53b50ced07. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:17:04Z), 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/AEA0D1945161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0d09e0541fc2e40bafa65d055736402fa43698e13c3516c4befc1cd5b856e2. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/AEA0D1945163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d896abe429cb3e3b0b067d218edd2a32dbe33e4c46f1b9afec44a7f7ff683ca. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/AEA0D1945164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad55b0e21bb5212a7fce1433de6999088d7995116f1b34e246c34fc4ed292f9. 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/AEA0D1945166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9827576eeffc439f0a70b2aaa746a9fd6b57752e999a6c7b9b958f6b56ea56a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AEA0D1945167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cadaedb8ac17a77735abb58eb86deb1713f5b4596db480e254f1a1f9943bac. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:37Z), 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/AEA0D1945168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8ec86e70956e06647baecbe95aed5b8c1e4d067b42019f24729c816eba712b. 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/ES71G2314610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5716650a240d906bc9219c0866992e03a3e32ceb036e10e6447f9a79afe6d519. 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/ES71G2422603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc746cef458f3529b8ab4f1c4ce15c7d0e4b4f032d6f6684b40938232a698ad29. 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/ES71G2423096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb502664086472f8e3255c6e756ad0b2b88a60b63b5aa87582690665547dd1cf. 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/ES71G2422613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d89ee09e988cce784e219c861d3a4d9c5bae171aaa0fa5ec25e98f4a7ac4397. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QM6P42564007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf53f836594b3c77d20ac9352024840c920ac5ac18f2e3de47816edf196d86f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMDA72547967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60946f9b757fe3741746f6ce3a42bba221fd546e9818ac9234e01c5808b79d61. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMDA72547968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301f665a4b20e0f96c75d6e08eeb32cd5f713a3daa5386bc089be44d13709fcc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMDA72547969.