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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bb9907a6ee96ccf3b26f29e297b3044a0ab1802f18139139c86a175006c6e0. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70edc308-497e-4033-b786-0396afd0ef92.json and https://artists.proofprofile.net/proofs/artist/70edc308-497e-4033-b786-0396afd0ef92.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a509aec98000463443b16ccd51392e457051a5839b74313aee2617360b5dd8a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DKJG51801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b16f64d23d03f6fa5ee1c26dba3d5d474256c96f0e1907bd1a8ffa0de14f771. 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/DKJG51801002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c87fc115980173ed5bb16f696564ceb9ae6c3f763027f6f6c125a03df9e88b1. 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/DKJG51801003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6b7d217f10c68b5c573c264cf91694d381f795cde899cef88bd9df577920f. 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/DKJG51801005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a22e5f4c6325c092ebd93b24e82c089c237578b4055b4e78239bb3097794a9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKJG51801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb8499d9be92f1ca45faf0226804aa868b91d73544ccc2f2495b31ab0e19a06. 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/DKJG51801008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6edf36b8f26ef804a2d2ff33b68c6a8cec1d70af5622562603d1d6e02bc522. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DKJG51801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437a663819c7e9e2ceb707fe4754a33957161790b6156e56ed564884acb19d2f. 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/DKJG52401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b231aba8539bb1a7d7920d80b66d4b306277d3c23359b11410497969b1ecd45. 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/DKJG52401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9053873605f2bb98f9d32c3e1c0134dcb0251dd337d7f4190d10e2ca747c93. 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/DKJG52401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc5eb27896a5c9d2a281a7c8b97eacb17b3572a0fe957ce47accae08fc02603. 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/DKJG52401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834551c313f306c4923acefbff246692aae2f0d44f22ab699decec17cf783032. 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/DKJG52401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e8087047c0fd57d1646d5e985061fa4927ff60ad562d99e0818aff03ce1e86. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKJG52401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b231aba8539bb1a7d7920d80b66d4b306277d3c23359b11410497969b1ecd45. 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/DKJG52401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7cc2fe5a90048c56ac103e3053680b907f1149d1317a64acf61e66935b06b5. 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/QMFME2357956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda074502a670b0cac89f74d1680028a91b9630baf04055d1d9cc5471f867a3a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DKJG51901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e904c0f69fd5830c64197f6cff4610a920294e805093a33a95a80415d7e348a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMFMF2032261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe912b28084567f54daebed823fdd4571ac97ca9674bd3e26a0e2042451658a04. 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/DKJG51807001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd351781b0eb5aaf97015473478e6f2c2e66ead7c4f13785f5afb1069a0faf7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DKJG51700601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf900542fdad9b0f2e3d7e2e4ba1102e2fad2bae5cb9da7693b0cb4be7f4d9bc6. 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/QM7282022126.