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 0xd4a349bbac5a0b9699b68b9e572be9ced96678b04c084b1047ede99609e2c486. 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/ab911029-e83c-4217-95c4-c74bcd18d132.json and https://artists.proofprofile.net/proofs/artist/ab911029-e83c-4217-95c4-c74bcd18d132.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 0x64837e44ee400b9137dd6444d388aece4c0bc383b1876adfa0fa327f711d72c2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPSR08009430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc741616fe689004d58a02f68e56a234aedaba6b53d107897b52ade0bab4f9f95. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPSR08007790.
悲しきクラクション (アルバムヴァージョン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed106f4334418a5c6d2a1873c19f0ab2c5cac829fb568c1e473a913a52348f9b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPSR08009410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544e2ad64017ac179af8780a90c73e5157742ff4df20431732d6c7e30795805e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/JPSR08204090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5932f793a7eb20971717d29626013dcb062f07f09f575252d244abcb1eb1333d. 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/JPSR08201550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb245738160d8b0177090d46b623d68d8bae99384d882d87e7b55e4215eb8917b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPSR08113180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186cfecaae2ac518276d06cb2c3c95a1a5bca134c24d5841f3246d70c0f1056b. 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/JPSR08316670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce73c55999c17ec5dcb6e4ea102d54bdc6fa60d03a4bed253efa96ceccae20c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPSR08316680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde7c53a529fd99a8b902ed96b113c48459ebad4405d65646c51007ae72dc179. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPSR08316710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e322e49ce408547838d14fd89a228b333e8fef1f14d924d19947fcffae48f7. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/JPSR08321980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf8f97394595f3beaf74cfbd1268114e88f68cb582fc2a4ec2fe3f62ec59178. 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/JPSR08510200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd35d16eff4e46ad83c35b56083786df284cdecb82fbb9375cf5dd7e090ff725. 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/JPSR08708700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7539b38230807d79d4c6e2b9922c9d98dc3ed963b6fce8b8eea24b598a4e6ba6. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/JPSR08705890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd187bf41255bf2c8b3c8155571e83f27ca6f76dafdb16a425a1752155aa7fe8a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPTE01209040.
NIAGARA TRIANGLE vol.2 40th Anniversary Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c0ba2415b72d569f6dc42a851dcae8ef696ce9c4d4163db9166d19c570457. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPU902105682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65a96bffc07cf18907caf0ca242b323090dc99d539add2c6d3accf8e8310cf2. 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/JPU902105674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4142413e93ab1c0583c88c9f31166298a01dceb00324eb2cc0feaa2080804c3b. 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/JPU902105675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeb02841f05b5a63b6b59a9a7a22c3a33312cfcd83979a649bf37ffb1f960a1. 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/JPU902105676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717f2d54f7c6345ddc7c10c3d437bec0d64aa76b54934f985c8af00e5797f72b. 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/JPU902105677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1ae7b14948f01af57320c5ae71194fba04b1e222ab1237edd1276cbfb13e6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPU902105710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b4b72a23baa1cfe233f0789bd4ff2d979b623149254136c60e36e16a686ce. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/JPU902105684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e23221eb5e0351b8a708101b2827427d5bd884ff67be2f81dbbaf3566cc9a0. 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/JPU902105685.