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 0x839c0c87ab50726ed403ddfbc0206f6b8930f9691c9cdeb6e59fa2ea7dbd9781. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fc7bb08-c490-4365-a6b2-8a60648122cd.json and https://artists.proofprofile.net/proofs/artist/0fc7bb08-c490-4365-a6b2-8a60648122cd.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 0x174353a7786021bb47fcab8f649a9984c34bd9725779c551c710ed2c1c001a4e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MMA031907816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd4885fb84f14b4357370e36123a4af6afee8d17162c40589ad16e86c5dd38d. 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/MMA031907627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e48169a9432872c962c543c65cf3a108b8f7c12b067c2561721227a7aa20d7. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/MMA031907628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffa58a87f040cfc767b3c14047025f0a96718e242bcaf002ee4fe069c291f6b. 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/MMA031907629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e236b7978842070323fb36b02fd28bc8be81ee297c248bae622cfe21b3824d. 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/MMA031907631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fa6d55bb53d9c4f01214f9d8fe9bb24e3ec049d73d1ab6769ff8ec76c5b1b0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/MMA031907633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201b1de9fd58fe61bb15c73c9f0cbdbfc30838045b3527da7073f65c180e08ea. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MMA031907634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64bf05063f9cb923644adab12e4721c0bc93917361d288e48b15c17dc88b7bd. 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/MMA031907793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c2e9f55fbda3addd1fc490cd7b28afb23b6f6a7c4fb915bc56eb713211cfa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MMA031907672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba9f7c54050aaf5887abb453cb995d79db83d738f1870c0b39892fb527f7c9a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:47:46Z), 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/MMA031907674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c351727ced4dd8efdedd823ed9824d9c573d6d2e0f7d12c43c61b98126d961e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:26Z), 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/MMA031907661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dbce0c5b83c9d86643c535d3233d79e6da6c3328f754d549a7fd845c03261b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/MMA031907666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe94351e16044215cae9d9871a7ce5a5da30ed9cb6b6ea28552502ac733d9c6. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/MMA031907603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442cf0259f3e2bcdbf16c036bfcfca0d85c130e78f91ad998381f2aed8e51915. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/MMA031907605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3114edd693210ba9ea9d342019ad550aee3de647b940c51195acf0c26a837660. 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/MMA031907585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63926e3fcc4d2af097ff9c91ffecbddcdd4243d5c5a3dc4c406efc4a8d4dd5fc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/MMA031907587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc491056008f5a5e7a73fdfde5ef37b8f0189477404ea84081f9854938d55ea30. 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/MMA031907588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fca8f6b895b9a19140ad972ce21d18b0aa3ad07dcf18b6d8d7e4a8eb8ab2c5e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:36:55Z), 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/MMA031907593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccd97feb2680a3b4a0802f72f20d9f992b29ed6065971b9b18fc879f1b0c331. 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/MMA031907580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2236acf0c9623fd2aafd3c4850d16dcd48478d048356530dda6d2343727416fc. 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/MMA031907583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be51454dc9e894d1b7c1ed62e0bad96f0eb15973bbd5fd081972f2b0a725885. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MMA031907712.