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 0xe91c747482cd5afe43a4e57078fff8079841f126f5210ca32260e77ef558caee. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09ad49cf-7830-475a-8ecf-e5a8c8e9fecf.json and https://artists.proofprofile.net/proofs/artist/09ad49cf-7830-475a-8ecf-e5a8c8e9fecf.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 0x24acfd1e2f5ef26679817488040241fa6dd200a224603ac653922e90d7f3bc59. 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/TWCC32105539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71895d306b259f0540b26c2be27e8ffe26cbc8588b47ac1670b7ddb869526653. 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/TWCC32202282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37be1a434caa58d928a31f469ff4dd0b88f6a9e82902473d4aaefdd36dc2d04b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWCC32207399.
我看你看我 - 深白色二人組宅錄兒歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7467cf079fd5da180daad243ae2b64f7b35368df9307c946da21c009cf5fe4eb. 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/TWA770700703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a5a663db75d40995b74bafe7344aca1f77645e522f50235aa2716511680557. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TWA770700704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8576e6f5823d0641af8b7253b7971f8cb10ab68ba23557167d7326f102d418. 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/TWA770700705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878677d15d60de6882c5a52d377ae6a94ade0f23fb9aba2078f4c0da6c26e2b2. 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/TWA770700707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ad44aa5974e73255f5f524591d0cce2a2f554ce5bc87f51703fa829002391. 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/TWA770700708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525ebcca0757050740bddf2f8715de2e9c835ff1c5ced8b4e58bf5b42754015b. 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/TWA770600491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d08372a81d2a55743598485e8c339c3edb2e08f64426a54d005870ce4b6aca. 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/TWA770600493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6bccb12ecc82c7ae90ddbcbf963e150619ba2f27efb8516fc7e89bc95aa468. 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/TWA770600494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2ed1b1a8d06b81749c796907740b145f6411c4fc4d8ff67025a193390e47bb. 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/TWA770600495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619019af73c1a80fb327fbab7193c581b2f8d8e4baeba4ab982bf85ee7d15bec. 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/TWA770600497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71895d306b259f0540b26c2be27e8ffe26cbc8588b47ac1670b7ddb869526653. 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/TWCC32202282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24acfd1e2f5ef26679817488040241fa6dd200a224603ac653922e90d7f3bc59. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TWCC32105539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabd166c4de6f3e44aa5ccd74b52aeec1fba261ccfdee05337942c83773e4d92. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TWCC31700001.