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 0x7fb13d56a2a9ea4914ae4b2d35c5ef4c226afa56092187cc6b5c605450f4455b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af1cc008-1233-4226-8a49-34ee587e46f4.json and https://artists.proofprofile.net/proofs/artist/af1cc008-1233-4226-8a49-34ee587e46f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
永遠の村上幸子 ～時代を超えて咲いた花～
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 0x966d3ce61f9a0db99f791f5ebaadc358230b21b8eef9e4cff306ef3e217e688c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPCR07801180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f836362ef2a05a85a0ee7dfd619e0943af915c72f3e29e4a10c55287efe8d3. 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/JPCR08000640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa551636f30f74924500872a8ae2c76d1d62bf356a002f6eeef2664e7bb934deb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPCR08100890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4998a73c72d79af62f926db8979de4b7f13d5902a1d5aaa695a0e1fbc7b64287. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPCR08200550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a648d1261c5f1f160d9ed4e69de1681087ea9fd42f9168b119e0c6701ce93. 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/JPCR08201880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5836e143d0ff5ee4c24fb94bf1ff866501b1183c67e8c7ed31c83607d70bacd8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPCR08300880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043a70aaf6d9e9d911bbaaea926f8f67e66dff5460ad60dc24269b6e3abb8fb0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPCR08502940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b109455a2ef4b9a2f7f8407c8d0b4e7df802c0040e2ffb28c066fb505bc75a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPCR08400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8e4f84c8791d522318f1c2716ae8e6b2cad11c006c53431b75297b537333c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPCR08600840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e464f550f97b41e536cab0ba148299c1c8e8f84a8098db27124e3233cbf1e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPCR08700940.