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 0x907d908cec26d3e31dd168e14c65eb596d5ee6c5c3669e81c588ccf334a3dd4e. 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/da40cd94-b38b-433d-ac3b-235420340af2.json and https://artists.proofprofile.net/proofs/artist/da40cd94-b38b-433d-ac3b-235420340af2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
〜fragment〜 sweet pool original soundtrack
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 0xf477825b001f2524d4ae6a5ca3e99be46f6f2b6465196f16daccccc5b197e6a0. 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/JPR502138920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0554acb59eb069a62daaafb3fdad18a8d7e6a16b2c96551e5bb4ef9d0e93f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPR502138922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46ec5769df66669c14b010a58ca4958e81fd5ec6d6b38542dcfbe5674d27f10. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:19:47Z), 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/JPR502138924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f229b24876b9a9828741822e4b632d739170e7eccbb960dd0fedc8a18a8f197. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPR502138926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1685e83538838d4190063400a8a0d6d0552868d72c1d167899bda299961d7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPR502138930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55a6e5a9207565d49f249cb3f2869259510e8d0299df3dd285964bb5ebe3a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPR502138931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f38a3eed9da9282940ecb58ba7348d8a6bb84f0c1ce6bec4420bf538dba1516. 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/JPR502138932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bafacd3466bd9edc522581298f8102d7011e5674f9f8a36af3468ae1567078. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPR502138934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770e2fe06f4d41b996828e90266fa447a20c2b684e0756d7cfd81cfe7fe5ec2a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPR502138935.
”Togainu no Chi True Blood” Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd5e1a7f5e5043f31652bc30c05435f23d701d7aabe6f4d8bebc7e94bba0a0. 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/JPR502138987.
Lamento O.S.T. 〜The World Devoid Of Emotion〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ebaa05e13d40d949418cb3d3e23f2c5208da87fe3c9e2c25e463be222dd0f8. 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/JPR502139055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d443065c3aee1dbbf396ef8eaa43039b57b6d3dcd12ea45a8eae8c32f69f63. 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/JPR502139067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3f4fcd26144c3021a080c6ac3a0fdbe00d04a9ad8923456016af452f0b728b. 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/JPR502139068.
Jaaku Sengen Soukouakki Muramasa Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1dfe76544640162aa2ef7fc370a72157bb8feb74611b3dcf7adb1b73c9a533. 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/JPR502201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e19f112e8b944c2082d2b23e4f5943ae44299a35170f88bc75483ec7ddfe4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPR502138923.
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 0xb19a28c5ae4fe8b1c344159dc0350c021fd3cb58d7e52594fd5d6139c7597a8d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPR502138929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6305af34a21b02214ae7d0d205508981371fd6b87566695705f1819a9a98543e. 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/JPR502139063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ec8db13b849180ee6c0a5aff9bc2651a25988e381c0067656d519c3d3a59f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPR502139075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad66cd73947883c9e053c692e900cb181568f5710518cc9dd489e3985e9e1e4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPR502201029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5f76ea06fc21737d0c005080d76465fa51daba6d7f72fd705f70e0667c1445. 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/JPR502201030.