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 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 0x035b06473664a021360987f0ff18a367da6ae4b065857ea2d34a7f99ad7be630. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df5e865d-0531-47e5-8142-5d32bc2fcab2.json and https://artists.proofprofile.net/proofs/artist/df5e865d-0531-47e5-8142-5d32bc2fcab2.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 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 0xda338956579c75d0303c7949ab5611244f7c2626db1db918b1ba91d443527a7e. 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/JPPI01050560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885a209b29900961cd2b128e6f78875248d67f3079667568a557e4a593282d7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:38Z), 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/JPPI00651400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885a209b29900961cd2b128e6f78875248d67f3079667568a557e4a593282d7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPPI00651400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8fa3daab22794b8d56797059579e1751eb8e94d830ab3fc52bc18b4730fa9e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPPI00761940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93155bdbfd8eb942d0188eb4299ec76af047fffc1858c44f7991b579f7fbca4b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPPI00751380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38991431957d18f704d3fd3078ce3875a01a949b0fa9ab81253728ab9e9e36. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPPI00854960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67f43747f0422a9dfc8087c5b8004c2598da32859bf6926a71f251da81dee2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPPI00855010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38991431957d18f704d3fd3078ce3875a01a949b0fa9ab81253728ab9e9e36. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPPI00854960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56758e180904a99609e389f0d96afe68f3263ccf48153772faea04a12f44cd73. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:11Z), 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/JPPI00757400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67f43747f0422a9dfc8087c5b8004c2598da32859bf6926a71f251da81dee2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:37Z), 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/JPPI00855010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd850e401abdbfe5b8346ba734f11d000683d4b33b0f33413173d7bbe1ca113c5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/JPPI00963690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda338956579c75d0303c7949ab5611244f7c2626db1db918b1ba91d443527a7e. 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/JPPI01050560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bc7f7e1eb5c7b1f43b72e98b7126f5772219b842f300ded9a0a0b20ae1b19c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:51Z), 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/JPZ921201985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147dcaac1d108b4c08ae424491142619a6e6ffd43e628ee5b90a9bd90d1cbd0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPPI01350080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ec211850ad034683c2ceb2562c1c21149b64eb38742ac26dd32f522fce505. 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/JPPI00861370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf440063aa602d6f120d50357cd2442e67a01514607c6fad08bba47ab03ee734f. 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/JPPI00950000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59075220b92f69bdf2d57c850511fc62d5c9a4d6ed532e2bfe7e8ad3025f8b8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPPI01054220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21340279823c7f5bc9d544931fcd24136e6744caac303c9bda3e0ea06cda228c. 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/JPPI01150060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed1354612747aa661a635ac89133fbf6d5ef14a0072503bbcfd3cf70283ecac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPPI00861380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f835456a75f76b44599997e56caf6a5dd41fd40e01c8fb100226eb529e6930d. 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/JPPI00950010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183da1893e2af204ce811f6df14446183fdebc835fc6a1c55229296967bf6343. 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/JPPI01354110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f835456a75f76b44599997e56caf6a5dd41fd40e01c8fb100226eb529e6930d. 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/JPPI00950010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ec211850ad034683c2ceb2562c1c21149b64eb38742ac26dd32f522fce505. 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/JPPI00861370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf440063aa602d6f120d50357cd2442e67a01514607c6fad08bba47ab03ee734f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPPI00950000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59075220b92f69bdf2d57c850511fc62d5c9a4d6ed532e2bfe7e8ad3025f8b8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:43Z), 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/JPPI01054220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21340279823c7f5bc9d544931fcd24136e6744caac303c9bda3e0ea06cda228c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPPI01150060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca8376b537dc2cacac7c3bd1b34f14aaa7ccde3262a470e6416fa44badbad12. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPPI01500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746afe0f650720371c41a7ed6fbf3ce28286f0c0087c34a9c591ab4e84844009. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPPI01500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746afe0f650720371c41a7ed6fbf3ce28286f0c0087c34a9c591ab4e84844009. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:09Z), 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/JPPI01500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f95cf9e4a5a1acd0e8a2da2655777c61c0e762e701ceadcb574b0d8a29957c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPPI01500780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd036ddfec5a038e460b32a9088c5092cc5ba6b07ba3bc3b9c00948a1c3077710. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPPI01356440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd036ddfec5a038e460b32a9088c5092cc5ba6b07ba3bc3b9c00948a1c3077710. 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/JPPI01356440.
[A Certain Magical Index]Original SOUND Track1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0618268d70895edb68490afab9f923cbc55b22ab368ac0ae203fb4636173a65f. 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/JPPI00861371.