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 0xd5acd5294b0b4a397aee56ea55a9d697a10a67faa19003797d0a2d2e1299c6c4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ac8062f-1b73-42de-b771-6f7f946a4da1.json and https://artists.proofprofile.net/proofs/artist/7ac8062f-1b73-42de-b771-6f7f946a4da1.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 0x64599d52eb0be8f2f4d10e41089bd889eeb08a4fc1eee34a038a31d750e7568c. 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/CZA161003700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70678a8bfe61f739e4ac500246ab6965deece2a41056447a74131894f83dc534. 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/CZA100308177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761d1eee3832c11c8ee73fb656474a12c88ed97d9963aa4138a2a6a5ae43964e. 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/CZA161302792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49692ad9e95bf7dc04f5b40f9349607924604f4ebdb0496c76afc1aae4289b30. 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/CZA162100462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1554f6a354e08126072770e70ef62e3a72e024e3913c2aff19d3eb7438421756. 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/CZQ552000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d64aa315dd656ce5d1f4372e34fd7375ad1b2f2db1c93aba87336d2122e19c. 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/CZA161302793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fe0f7033e4924aba5a399d5206cbb75a9d2432ad8d109ea53c7dd71999932f. 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/CZA161400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bbcd6d5db12732eff5e838604b5f9671643dc223199196cfa683adb6c3a440. 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/CZQ552000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cf98a679cd79c0dd39598918c6d218ec47dc6efad479ee94edae310d07c2ab. 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/CZQ551800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352f96f6fc943d13dbe0028937ea35cdf858972b20ab7f811d9709d35484a4b5. 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/CZQ552000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc6c3c9cfae704894a2023f354d67fff9c7e9da4486f4fdb63de0faf9528148. 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/CZQ552000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3025c2de06b64a4a28398551cb672596f17dafdc41b80eff45427f0a097132f. 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/CZA659451272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d567d3a70a99052027b3199be8bf95da5a42e245639fbb1f0da8bf882565e4. 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/CZA167100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c5aba9bed3e8ba651a5476cdd3fbf4e2fb5ec7afd84de3728665c462b41413. 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/CZA167100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7e09ed84cc2e7f3ed23ecc9bee13f826cbe69b62642cd006d1c5da3c2e6505. 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/CZA167300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f83ccd51a5a19f4a2b622315019f758e7897cf8f1f4d4030d9239804f52407. 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/CZA167400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9399eb4314c3234b60d55e49ee07eae2b1834e413ed84b311d2ef1e650315. 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/CZA167500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15818dae13726be5abf41a68e09a568dba5a1b954615886ff22327ca6b2000c. 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/CZA167600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444adeea9ac36b683e73993e1e0551790040b2797a5f4741c789c0d47dd53056. 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/CZA167600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772cae900a15e7d5786a4fd70ad3e3dd5dc5ff31e023a5eb1f7a603a6641d2a7. 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/CZA168000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef87758c7c2ccbf26d2b3de69d904ac2e845e96ac2bfb68786af1d095796e77. 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/CZA168000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf149ed21c0f91f0ba4029d45115b3bfc8b7fe047745a3164ff5b814629090334. 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/CZA160609097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813cf61d8f39de0f9c9ade85beb1aec2c76ca0936230b6df125ae32d31ecbedd. 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/CZA168200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d86d1fe3e3c25d670e167c73477ae905a9689f239e0aeae8e8a175d702c41d. 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/CZA168200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe24185150bc86a74af06ac3cdf657ed659332e6863ccbd59c7d6700a7cb675. 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/CZA161101031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448d9768fbd5443c78cd53a2ad466bbb62d0a79722273961f57b4c5a712d44bb. 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/CZA161100951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaab26c684187e9b5481ed97a2006bb0c14d715194c8efdfa510466de7d6d31. 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/FRX451573071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569b56d368a4fa3910c50504a3bd483303f093c190164f7a7ce953b2ec679138. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRX451573074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd614031a1a0e4468d5beb6340976166bc0aa25a5fc95b89f101af24379a0f4a7. 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/CZH682400005.