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 0x0c8377f5b194bab503937c7c56437366643f6df6fa6d9e50577cb4ee44e4d208. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eecc7c2c-3812-4f97-b9aa-410d9842bc20.json and https://artists.proofprofile.net/proofs/artist/eecc7c2c-3812-4f97-b9aa-410d9842bc20.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 0x850cdb5dd17ebde219d2a2c951e02fb5940f49bd6a13b4ec63307b22e5456ff9. 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/US35B0416701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae59bf346fae6c445f377c14bb68c87da79cf4b682dd8c076eae72951a6619d. 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/US35B0416702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c664f3b1f849cd4c9ff38c9590c294afc4dc39f9786fbd8d3492ae1d530cb4c. 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/US35B0416703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66b2cf098949c91e15a0fb5eb192c0139eb0fc0d86d4243d6ac42a82aed234. 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/US35B0416704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d44d2dd2ead727a11cb1d57ebf34cc067a6d748f157799a1e9ab151d51706. 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/US35B0416705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8c16955211057213d67d70cce0941648581617932a92ecf1e6bbb81732759c. 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/US35B0416706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e3db2c17b33113238d11679abb06018e57e5e3ce792c68e207884ee1aaeb4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US35B0416707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed59c0e045259981d69e37953efdacd37971dddfc0bc9a632ace7651e0849c6d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US35B0416708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922688b101da05cf294e5900c30ae87d3d625faf231ef27d8ac5b758033b9b21. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US35B0416709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eab4f9f732ead08969cd5c8256ad2663e16f3676a23a9672a44ebd33566a668. 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/US35B0413501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6d1359096b2aa069de4cebf838d6199fefbb6d2d8c5ee7a127446b6fbc391b. 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/US35B0413505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0869a6306852fabf31862bc3608632e101c47ac8bd6a5cff463730d2ea1eeb2. 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/US35B0413508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3116ed65fa16d0d4ffd37c2d201a6089b12aae54caa5cb8ebec39d2c15416. 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/US35B0413509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f8c5cf0249595527aac1192b81f737fe8b120b1234df572a2ff2297b85c133. 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/US35B0413503.
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 0xfbcd38f9c56b7b69343d33f3e013e74b88ba5feef342df77a2d48e77279ec0c0. 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/US35B0417101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c378ba852ea1eb904151364d39c5c040de0d7a440fe488590d6ef1241e073d. 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/US35B0417102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac91c49c9d9e52e4f393f35c0a0cb75077c022838cc9a575a0270fa8632525f. 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/US35B0417105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76405589a7f0e495b6d6a52c648030d209837dca17905b869e346f1125b05868. 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/US35B0417107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302ecdc93c26d3c166db49ec325167362be5dbd7de33546d9b3fc4c7b5a61c88. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US35B0417106.