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 0x12e0ca9ce3fe3cf7aad03eb3de81792cb5b3b2487c70b9229755c5bb65aa5428. 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/0f120c19-d545-4549-8fbf-993e1ca095d2.json and https://artists.proofprofile.net/proofs/artist/0f120c19-d545-4549-8fbf-993e1ca095d2.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 0x2f2ed3d307f8b68a2b7a20e9bf2eba771da31f4c6209f8cdf1343a5fd48fc321. 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/UKLV31700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a606aeff76c3a320b5364c8c967bdf3b83026a4885217cca3d9b206dff1a78e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKLV31700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc479107c2596bbeea97e9c4d5e5606bc35d0a341d830437ef0a1dfdb222f9cc3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKLV31700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03f02b039ffb35db505b3cc724119317d048b65adf52708c0facf2c56f6c7a9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBEFR1908935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7617fd3ecf817e696bec17093590900102ff780b59949673cf1c975790e569. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEFR2108974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fda6c64466d84e2e2266db02e7436704f310380b793d3b25cc7d3fd0d63f34. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBEFR2209001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fda6c64466d84e2e2266db02e7436704f310380b793d3b25cc7d3fd0d63f34. 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/GBEFR2209001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8b3aa15445dc94df86aa3dca1e36855fdf75c46c2c8474ef7e17a961e320f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTV32454434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd162785098ba21c905abef8b10df05d26b615cb20a7a469cf1f4f9844f9acf25. 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/QZTRX2429520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b2eae029404c59127bf48b8bc592409a82bbb7eeee729aac20b50d73edbd4. 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/GBRKQ2473919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd140c3a262586485d9a24e5899fd3f726d21fd29f319570ce13d9d4c6f24e9e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:52Z), 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/QZTV32454436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa058a587ceba6f66dbf129dcebc90f0c689ae7de7ef65b31051a8eb9c2203873. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:00Z), 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/QZTV32454440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2657794e82e974319e05f0980287d7aa53fc342d094326e3a6be9ec47f7f4e. 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/QZTV32454441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9942f05c231c14f8a3677167141f0fc05089125bacf52df2ff045994250501. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFYZ2537536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a59ee2f8ae65537afec323f21fbf3d2e18f7a9644e87709343d85c43fcbdad4. 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/QZDA42555570.