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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 0xc988119cdb87a9600cc259ce91fc6d422c71f4c6e74263b8ff7daba890b0f987. 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/f2ba1c80-217e-4f99-82bc-898a3dd7ba44.json and https://artists.proofprofile.net/proofs/artist/f2ba1c80-217e-4f99-82bc-898a3dd7ba44.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 0xe4c5427cc6ae5bde0d811cec9a6e0a28ccdd83c66b5c14fcb135724eb0fb2c06. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCJPG1857886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc357c7e1eb87650eb01c1c8f42986c9c0a734b838c5decc802c64953174c34e6. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCJPG1857883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c91a72123f347a37db3a059701c83e07607e2154974afd3e5ce343e754f8df. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCJPG1857885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857f39b7ffd7bfb5da100e05ef5699d602732e8d0639210e571ea438934f2347. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPG1857888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a93663e26bf554b195a19eea4f164a66f870373a5b57d2dc6d2e5ba2586cb1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPG1857890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed023206479c68ca1596f7f33eb21765aeb87745817ff2928ea5726ec9e905. 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/TCJPG1744739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e632edfb5da8daf07a2bd666b0ee31f072ffd241a9ce8b4f2c21cdb0004a9f5. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCJPG1744744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dff421e247963d4116c8c8ec14c97fa17ae9f2f6837d4e626dbc7fc3f7319. 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/TCJPG1744756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b752126ef9dc1ca3bd5a5002efeaff4798dbe5d843805dec910944b4b4ccb9. 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/TCJPJ1976193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b752126ef9dc1ca3bd5a5002efeaff4798dbe5d843805dec910944b4b4ccb9. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/TCJPJ1976193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa189ffd1535cf737be1718a45c76ba37ad8629136d447748b8c501872cc04826. 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/TCJPT2274832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c734114b7cb104b44dcdf2d5a383320609d9d8011cde83d0d8854748828d5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/TCJPT2277061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45179e682e5a1f9e23f72f42abee808274ccf20d2765a2fd09ed507ddeaee05b. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/TCJPT2277073.
Classic Brown Sounds 2 (TOSHIKI HAYASHI (%C) REMIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0e8e38298e9265e3ff7eef4f059d3966f346d621c49ece467546c808aade8b. 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/TCJPW2323124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a759aa3ae9721ac5a0c3a9c94e4c85d4dd590742916689c046505f909e4cc0c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCJPW2373864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9799cd75f79708cbdb6f8eb7e134827983667c0138082edf57b9af7bd3d7b4e3. 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/TCJPD2400537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710a68e7ac28e81627ab375d7cda356d509074322395ac7cac5b02909ee09daa. 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/TCJPD2547416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d74d96d17d4cfaf6dbbc03cb3b052919f4ff4b8ebe94b9dedb92ac77b1b2df. 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/TCJPE2526273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a196830c923efc2a04f636d9266888db8d2e102520260c6dedea3cf3c39de75. 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/TCJPX2323968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78e9a3391d35977e173938baca59394f16bda1124168104704ac7e143980f0e. 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/TCJPC2417252.