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 0xf1898364c08267c468cd28c14427d92fbb11fcc03d96a712af3f33f250d6d2af. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b216ca2-7a11-4058-9190-c24b63d12856.json and https://artists.proofprofile.net/proofs/artist/1b216ca2-7a11-4058-9190-c24b63d12856.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 0xb6b8e761e56ba2a965aa199cdbe7839c0c10e3dab5a37112803a87a3e7e72059. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA62500957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec2a93c85afa22263901d01f6cbe5e30d15aa13a89cf515687c77c86f4910c8. 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/QZDA72539189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fabf2cf5635d9e90ec48ee42c9f0cb50d648a82ca0ea90f83180a35407d746. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA72573447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc352a9317d2e411f938aef396fcab8f1290c999f25e89e11afc8276823cdc956. 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/QZDA82577536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d5a310f4ea6cf866b52085a8d08e67830bcb4cc512b326a399984df81c83c7. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZES52525320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055c1e8bff2a4bb0e49522124b3182bf0d1f95d44bb87b701eb17c2050330f11. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZES72515169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574d8e8ca629ad646cf19febd467af762b2d73f5214405525e1e825cb11b2248. 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/QZES72576570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6183304cb193aac7f80f77453a93eee864e17efd0fe7fb7aa37aed013c37d9a4. 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/QZES92556802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c641dbfa5cfaddc4d3c06decad6da03552114b0e1439a8300824f0eb14c282e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:12Z), 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/QZHN42519714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3d6a647cca11f62dcad20110ea31630231a01ea4d357b2e62b74dd49ff6ef1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN42557424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1355d61e3e225e6ae0abdd7f704be2b7c57862e38d028df630bcb8fb6c6a03cf. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:27:04Z), 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/QZHNB2567783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb74fc037c2dcdd7bfb998b53b1be14313eefb6f9531d792754c06d7647ff31. 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/QZK6M2527211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca950c3c098cd9f0c02e0db2d154442d9375e86a7ef27053469a1410bbdc20e7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6L2586613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38a3acd0b6be820cc743abade0c1883a077eeed900a81a84d8ae9b6118b5fe2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBD2580109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0683bdb5c8a920c2ab921cec78c19ebc33a90ac33b024577ab0ea534c0d42386. 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/QZWFV2505958.