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 0x1fe4b0d441254423284937e045fc1ab3ddfeadb2d165eac75a8ab9c389579589. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcccc41a-7f9a-4d3d-af5a-1286ec79f5e1.json and https://artists.proofprofile.net/proofs/artist/dcccc41a-7f9a-4d3d-af5a-1286ec79f5e1.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 0xf7da4f7d81c0778654f5c3b237e7bf3e4a94c1323000935e1d7b82016e5b1bf0. 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/TCJPY2315811.
Represent Akihabara (feat. Haraguchi Sasuke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45830b5e601cb6057b17ff9007cb7c2cfee9fdb3158ea7a553c4f5da7f0cb8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:57Z), 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/TCJPC2445213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4640b3a9929b4570d652d19184c70a5ea724224fb4508135259c5ee805072ba8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPKI02415348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2a2427004b28cb8fd206c1f5ca6d659cfd99b3c1ccf6637c523530337fcf63. 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/JPU902501942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f9a98d1f2cf03949f8181dfa51a7c6c4017eea100e38e368dce150874e5a3. 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/JPU902502698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd0acbd089870bf9165c4ef67cdb0dcc410d171cb4402a19905d10b0949312. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPU902500829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6742e3ec63fa00c74a0676ff4ef190f4eb865a0ff58e0143edba7daa6329191d. 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/JPU902502132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3362dd4f3e19ad5991558475fd73936746f3b8d26090126d213c4e4baf350fe. 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/JPU902502517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f9a98d1f2cf03949f8181dfa51a7c6c4017eea100e38e368dce150874e5a3. 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/JPU902502698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2a2427004b28cb8fd206c1f5ca6d659cfd99b3c1ccf6637c523530337fcf63. 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/JPU902501942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee46112a292d9a5f13275bf8e06d3c051a0bda3ad499272d8467baaee6b4b0a0. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/JPU902503074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dc99ca6dc805d78e21c9361e26960efbf11730f227d4e5279b4c3c4ed918d3. 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/JPU902503075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cb2a7cb82c6e2ad884ca21bb13c90c827126e53b8f363374ba90d03a38828b. 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/JPU902503076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e21c38d3c67d80f3ce2ad13a1cd115e7d55fd0adb1fa1defdef9a9a5b78eb76. 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/JPU902503077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da4f7d81c0778654f5c3b237e7bf3e4a94c1323000935e1d7b82016e5b1bf0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCJPY2315811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e05bf2c7e9c6698d1bb826b4d5a0c32cdeb950a1d2fc529f807faee4538eda1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:57:54Z), 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/JPU902503079.