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 0xe4d96dfafbaa35a04eda7e52b3e4c68d60a9a1140cc07fce9eb7d241c481146b. 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/4b6c4452-5c72-4b2b-ad89-542be091d89c.json and https://artists.proofprofile.net/proofs/artist/4b6c4452-5c72-4b2b-ad89-542be091d89c.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 0x4906055015d2b686fc055fcf40636f549763fb9ce5b5b738e574686c9c1349ad. 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/DEH741510874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497a47d0b9f2b1a2456e3a175bf872b6de0647c43eb5b0bcdfd94d4b9e089a4c. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEH741510877.
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 0x428960ea448085c37e4368b610a683cacedaed81cf80584a19e4e85af06f07ae. 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/CA5KR2481381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686eb587a6e7a0f0787b14f337e2ca16ee66ab2c633e80de666e4992a71a2142. 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/CA5KR2476571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ea9830c9d3ff5c0e8891a9fe7ed28ac9d334e1913423bbf89bff489980bfc2. 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/CA5KR2475560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86e278430c178c68f496e758a6b45e4a9d5292734b15e063dd8f248f72a2bed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2458315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0318526e762d8abc52ffc2440dbd1c0856a6029555564d68408f95a4b633c922. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2453271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dc0eb3dd8aee0b36d254ff89ebbdebf38b896a3196372a3e6bbaa2b4df3a94. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2430627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6bb4fc84985eff83209c1f40307aa634f007c93e60496d9483f626ead8b31f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ32475232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c62fae9b2fe45efa2125dab71ecf0df313e804ce85a23f2bc64bc3275906b. 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/CA5KR2413545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6787efd05c16f0d9b3f93aa672c4c412cf59c32b4eb60fafdc773991372be1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2413546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cd33530197f0f4314ef2e9970b78cc745c350f883cf540c61de026765ae754. 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/CA5KR2331577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc877ec7f9994d94833fd7d1bd17a61d005d264c891c2671295423d3de5d0c85a. 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/CA5KR2267114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760474cba345c5518d9cde73a5d49e88be281cca0e0e442075c286b56d62cd0b. 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/CA5KR2220040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66982bfab242d5d95ab4de90f7ee7f105c6cbefba2ee0133ba12572eca63177a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR0027886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d67c201ee5c4f7c77da365857ea5fb3dfef7d594e1ecff1dca78c989dc43c3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CA5KR0004627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d428c625408bc1044461b335e57f6e84b6de4bc68fd6c376f4a554359edd58c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:20:23Z), 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/CA5KR0004628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b457b4bd2076cd84154e02507cd6b69f02253a512f2bebf9e147795efa2905. 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/CA5KR2517322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe800b02dd7f4704f8e0718f898d9d28971e257188806a6aacd7f353fcd1c4a42. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2516154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c9c20e59de12c4a0ab0e9b5bbc724fe0eeed8dce3211a869076c831327b16a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2515158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba320de3c7ea2c5991d2dd476b0f84556c7e1d580d4e136efd0bff1f705e5de. 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/CA5KR2512033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bf712016c35fafa321c1e1d53cc3793048861df5b4f1779e5d0d84f815a44b. 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/CA5KR2512943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe6ac4e7342396479ce2e89ff5b7008a810e5c78e4b0cd373fed9e53bb87ffd. 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/CA5KR2510486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269fccc488b06c05173f5013ee80f9497048093ed6158deb2a673a1f9485c611. 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/CA5KR2509382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c71767b35e34a1eaa92a8b17d6573ea1b47aac5029cfd8b2abd76303735da. 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/CA5KR2505012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf529ed2f53ed56bd4088377961378345b3a7cc7903efc2cb22a14fae7f3ca1ef. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2497504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cf13d0bc9f7bb818b5819f60901d2add398b07d7e42c2e83f7a235b1abf9bc. 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/CA5KR2485338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890db24346d49ab6e6e0afbfd47765f4af6517816fb2166744ad2dde29c19716. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2470735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45563d5bd1717d58f8b54530b52f0b72789f372f370b04081c45a94056319b4d. 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/CA5KR2520096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eadbfce0eb3eed95d3b867af7ca25eb4d22745cf7a9775527a7d64cf8676ef. 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/CA5KR2516210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be392d14c040c228881d5db06b8eb7f2096dc9a80828eec970009a9163f7bf. 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/CA5KR2518872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb5ec52ef250b13e32194878247289aa241c44a5b750d5e0d3c38a58127697. 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/CA5KR2518533.