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 0x98adc61f24fae35f4ce9dd7b2a96dbd049673af4f288f58dfcbd8115d06f39a4. 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/01ad7709-39e6-4185-8d2b-183128a9310f.json and https://artists.proofprofile.net/proofs/artist/01ad7709-39e6-4185-8d2b-183128a9310f.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 0x5c6113ecc31d024013cb1c444da69aa4256a6967fb49946b76689cb8ee6ca59b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:18Z), 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/SE2SL0100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38274cca1df3855ad163ce322208bb9c87cac555de8a1a452ee497756079319f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE2SL0800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c71176b00845ef73bad5524ed95a6c6c7a81962f36acfdfe2973f1a834e765. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SE2SL0800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81785a7f0a2081db1059e501c36c71cd5ece9628135c38a58e52f264e59b625e. 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/SE2SL0800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de554582fc5ef8060d7e0c362df82c8ce1ff616425873e92da0d6d3efba5585. 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/SE2SL0800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28b332769c20b578a2aacce2efeaed0ddae846526ebb9d2052980bd852da9c8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:39:01Z), 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/SE2SL0800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3a78c51bf73af6718e0cc8c66f15adeda6f7871075b20da4d9bf192b1d584c. 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/SE2SL1200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53178921846809d33f11a1d3e99bd811960d5674cfe9d75ab480f0fd6c07f2d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE2SL1200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8c58d10ab7260d60f61f9e075e95dab2d45e9045fd09df099162bf64943c75. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/SE2SL1200212.