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 0x9df819ff8640420e233d4de1e697fed99f70d151d73983c1618356bbebc1cd1d. 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/aadd237d-f097-40fe-914a-b1d2f864736b.json and https://artists.proofprofile.net/proofs/artist/aadd237d-f097-40fe-914a-b1d2f864736b.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 0x16093165e1c4d5c041bca6cfd5abf4910f2cf469c2968c3648f2d0c4e5986319. 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/JPWP02170619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46438599f29ffbf98961ed6cdac1aa6d07f3bde70de9abfa967e6e694a5d1f0d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPWP02170623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5e37854f23998d99707b62ecea06d9a9be302312f23f2a1302fc62f4a943da. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPWP02170627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a652875eb1138ce7d2ef5b0e99aee4bbbc9fc191c47012b75f7b8618ec89b5b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:54Z), 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/QMFMG2361088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b486b03fc070c4d8a614370409f70757790d89c8c40ddd607be142c29848d0d. 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/QM6N22438282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15fc100aa4e5d5c0d2a33203c2d2bbabe87ad6736dbbb5960faf9de06cb85ef. 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/QM4TW2484740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd272347ceb01764de5b4960c050c95a8cd43f3bc558242e2c8b9a16fab4053. 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/QM6N22438205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b486b03fc070c4d8a614370409f70757790d89c8c40ddd607be142c29848d0d. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:23Z), 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/QM6N22438282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a652875eb1138ce7d2ef5b0e99aee4bbbc9fc191c47012b75f7b8618ec89b5b. 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/QMFMG2361088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408bf1f40e71744ae4b5a2ae0637d77e587940edea03029fd8f8698ffceca5fe. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM6N22438201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa118049315407fbaa0e1ef03ff756844df95df447d9aa53b5743071880ca7a00. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:36Z), 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/QM6N22438202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0b66a62e51eaa7cd172ef3cf601d176de00323349f2721e3d4c648a228706c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM6N22438206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b46dad10b7cbaf7dd1192b59e2ec8eb85e5ab20a47d615e85a5723a1b0b4f3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6N22438204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d8d614d9fd2e665eab73bb27d7f348094c0ca44d36c8d0ad5028bbd50ee6b6. 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/QM4TX2525745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884dd90dbfd527685d781244eb436b9f416f4c3521e066019f6c8e95d2832966. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2525746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e64652d47028999f86888d0b3fd9183c3f0949f9d059a24dfc2b2f22109c1ad. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:03Z), 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/QM4TX2525750.
Summer Situation (feat. SIKK-O & 鈴木真海子) [Band Set / Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db484fb63d67e47c3d914c64f05747c86f72e1fb41fd297603243f4ed3910b6. 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/JPJ902004860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c92e3983c700a6184e58525448ac5ff90437cba70debad90f093b100f1771f. 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/JPU902304091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42fd9e643573a35995cd924e292459fdff07a58e281aaa44714519628d56d3a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCJPU2385234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68ef69fe095e21e17691574a8f55811550b7799fc1b0e02c0b4d5ee15ae41aa. 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/JPJ902404940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e656e424a24f78b7853be3bce0bba3601602aed1ce997b5df93d8410b1aa5ac. 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/JPR232201286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c286b6bbe8889175458e22e64bad52103692978aa7d290358acdac66019133. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPX2352700.
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