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 0xa12e5f356696589e96d88f53676fd9498a524c6c165b8611d20d8f20042a654e. 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/57f9ade3-d869-4fb8-986b-539a1e809a3d.json and https://artists.proofprofile.net/proofs/artist/57f9ade3-d869-4fb8-986b-539a1e809a3d.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 0x5b052ab261de83e503be4dc7baf50f8db5e55f26b29bf01074fe654cd00bc365. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:10Z), 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/QZMEM2387840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7733cd6c63ebfe178c7a7ed3c5fe6b1450159b9562b74231d1b141df5d5af359. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZWFM2387048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6284de2a3d731e282b16b8ecc04f12e6c4cabe2304645898fae81650c823b137. 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/QZES72498062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b75bf16af1d77db8912df6b9e6fcdf7d14a0a03717a904d9f81c1d7a74c89d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM24S2405503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552198053c14d7e00600687877f0b169d5f5706d3399371edabac5e187164ad4. 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/QM24S2407106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb759a529bf771fcffb24239a27eb5a10dc9a70d1858e68c1c030a49e08733e17. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM24S2407105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d8a754a9079e4db645c5b6628e2e8e36aaa1c9692cd16b849df776b6bf6190. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:20Z), 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/QM24S2407102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2248573df5b91c8f7410606f99d82c439121122b668541648bd67d27b8616a03. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM24S2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14597b013e388f3fd490b58a426d0cadb7e87b5d9a1a50abc03d0e26c8dcac9. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM24S2501548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336f8b67d16803d339af43523728d3d0b66f71153ed42287487d8858e7f16c05. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM24S2502026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb63c474618337315bea02511d602c3542f0ac886cd4a81880ccb2c2cfc619c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM24S2501574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0121afe88169e0637140b4b585dac4bf495d8feadadb5d08e7afd0da578f8040. 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/QM24S2503548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5085098e74ce9f8a64bd9cd5c739563ef5eabf0c880ad808b2a1e9d43eca5f76. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/AEA3A2094014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481849b078629d31a59cec4c39a276441a75556eb3a2afcf5fac3b4c9327579a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AEA3A2001261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15d74fa95d0381441e22e514e0df1915ffa0d4fb0483f585191d15181d76b08. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AEA3A2017471.