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 0x7560d07d6c877ccaf1940375600d90c411edbb0168ee62e666f7651af84d79c0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccd0bebc-a588-4919-aef5-dd615f1e5d30.json and https://artists.proofprofile.net/proofs/artist/ccd0bebc-a588-4919-aef5-dd615f1e5d30.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 0x0b7bba41f3b2a43bef0c846696ac476a80f5fd88808b44a465378730dbdbf253. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2438788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afca78e66c33c9ffe56d90808c4b488b9d9e057dd283cba7f42babe1f7c3105. 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/QZTPX2419333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542540cc9301ccd4dd0c8b8d506b581ab07f1984cbc7ddb266bd7c4dbc21ff32. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:57Z), 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/ES75E2508487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddc2684642c8b244624e22ab26d01f75f9a003164a7270644ed00dc464c980c. 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/ES75E2508938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815dc15fbd059e323c0ef20f0b36bfec6987f2755bf6928ae6f9c4bd051dc436. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXF9Q2529881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddbc7f611c55ce8b0786f5086a929f4965bf7768b94c2d0e806b8728889b6fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXF9Q2529885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff40b0f79f890014bd40ba397f3f2d0904ec21ad73d9fce842a21fa69fa35d6. 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/GXF9Q2529880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc08a46c89e1788cbccea36a23eba48810a998ad4961d4e4ab6fbc7dc3bc69. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZW9K2421225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f283ad4419804c2c7115c3a21a1d356d04d23011aa8ee8289e9f74a9a6c45. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES75E2412848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d3ad7bc60afed62b8a8bc6bca78d9d9504a9ec96fbe1f9fe0d9143f939682. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES75E2414830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e69a9578ea015e0db374f5437c132a56b5f94da13e956af6a5aab34afa57e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5BU2587175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29a0e0029d9804e6d3663c8410ca403ba52e45027d48b8a3e82e84b3cc49b99. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2587178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c80c80bb301475b6c0ff006bb38bb8a28e2ec33665332ca47b2dfa3566975f. 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/SE5BU2587179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030cf29e203d111bc33684a2b49885634ed57c0362babeeb03ae7276af80c0af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5BU2587181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae53cb47d01b8624ab72c36f22aac01b955276676c735618a2c2e5c7503054a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2587182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff3b44394f916e24632218ca92b8e9a4176059315a4ff3b36db2f552c5853d. 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/SE5BU2587184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735236c71bea4e1acc243fc77047854e99856aa2bd8b06179bfc6604540981f5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZFZ22566064.
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 0x969fbe21e60e4b6c01299e2e895f2a2f06ef661505beecc43f24a6c013425953. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTPX2357275.