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 0x50ad7a97ef958803eb292900d2bd112922a6018d7f8a8249d01d5bc3e91ad6b3. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d575dec-abfa-47bb-9a1b-04c908994b70.json and https://artists.proofprofile.net/proofs/artist/5d575dec-abfa-47bb-9a1b-04c908994b70.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 0xa8bc003c55e54fa2edfb07b8cdb6c2e6754a47af2c203b3322efd7bc327b866c. 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/TCABQ1348843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d38e6b55fd7b3e12ad2b902116eb3ff5f93e69acdeaff305ed7bce1ec9b87c0. 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/TCABQ1348845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeafef7dd0845b4c453875c8da672709f2839c6fba43f1f3cb84214a4258cca0. 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/TCABQ1348848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0402bbd33e9f8adb3ccb84fb45a5b9166692675ea8b55c17c5aae310fadc34. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABQ1348857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae00c860e9b91782b4f7b042edb1d5383ea31908dc91c30dc0fd52c36a0c631. 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/TCABQ1348858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa23041213d5e2a300ec9b663ba7af4734f7418cce36f75c7035e32bd1ad393. 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/TCABQ1348860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef46fc58f4ad78c6cda508ab3e3fc9117aa737838c14bdb0c5a9a7a6dde58517. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:34:01Z), 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/TCABQ1348837.
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 0x1b65726455cd35e501bf2e5f6bb64a0b776a78ed340676ce3b2340143289257a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCABQ1348838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a812c1d273117f3d45dfd94fa9df7938782437bcd95a61ac3c1f91ae0656c17. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCABQ1348852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906824a6c667c4d323b6da2b5fd26df4415098a59eda7b58e696efa96906870a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCABQ1348862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b0e31a85db369c1e9fab44da52b9c8a9ba89bb48d0b3c9a2faa6875ec8ee32. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCACL1652045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d39591f92452b2501b9fef790110e69e2b353473e398ce01bc3945ef20fdde9. 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/TCACL1652046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a230b17f6f68effa3631857685e83e19d474b87e69648d683f2c04987c2b09. 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/TCACL1652049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f951ac24262a751b8b5c013ef82f6e6961d4b53a7391a8f95aee80980db967. 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/TCACL1652051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1c66a753685fa3c42da98d2dc3bbe42e26bc7cd81d47a3b6e09f6e0b400fc5. 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/TCACL1652053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35994c0b8040b9f587624215a66c8f3c1fe270cc20301169ebe9be0303ac667f. 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/TCACL1652056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0436a09439ba9895ff81004e8142236e98e2109e6cb68788e8e072787f50f8. 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/TCACL1652057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77e870f0cc9b38d259f246fb28c401ab590fee3606678a55278f1b023581596. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACL1652058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0b7812add7f5d9e54d0df6b5d7d8af858e4d464157dde782708c185b0de6c7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCACL1652043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a219562c2d554ea87ff6be85158bd573e4ff18b96b3a8309625aabe4391df5b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACL1652055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a82723eebe2a09fd936f52435371a93cc81c898983da1e011dbd261651a6c69. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TCACL1652059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f6a369ea2fab42b85e9044ab72a621e6883d37168b7b220d48b33d72524cfa. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCACL1652060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85af7de6600d6c40e5a1e00f8084bcbef4b46c3a8e4d5682f6e68df828876b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCACL1651986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0dc76b6d04eb9c8039399d9ffa6ac088bf73d6211816f3f2f7d2d060b78473. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACL1651987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559ec78663df5170404127d5fc913fcec3f9182ae1e41e70a4ae8404a387a1e3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACL1651988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b272cb4045bf719e09ac101331655221356f4ddc330b93b26f7ab6728d2d9da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACL1651991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d92e93f7c5e0bec94b13e87e09f573f81871c878c73f4599121d17bcf9bd15. 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/TCACL1651992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815db523afdeba7d94e8b5845879a3069ac4472df755b4f91bdebfcb7759d57d. 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/TCACL1651994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dc3b088530784ef6482b041f62bc2cc2aee46487945471de3d4b812cfe4c6b. 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/TCACL1651995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb19a47417e6c933a45ced6d928efb5483edf1d1fa9d9f958dce16d873b10b. 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/TCACL1651996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff50a27f26ae5fd55f2a91d12b505f4d08caf6e3ca001484dbd955bd3d3a995. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCACL1651989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f2db8a4f9caaef9b95dd0b3de501d60b3ae1243372ece8019d1419e259dde. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCACL1651990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd29137536be27c5a760de1b6bdd2827fd4e91967bb0c4a02a2fc74427f1514. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCACL1651997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da1f7f9a58e11cc37bf55d83f54acbd5b91c89e862132510ea271bfaead4c6a. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/TCACL1651998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e776c00f272ef0cc90b43cbe0588adf13a9ae31ad6c4f1312a8466d36776f4. 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/TCACL1652078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1be4c9776ba74c46fc940c32e7cdd6c18c0f6b2a7b22c29cf8b33dd07a27b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCACL1652081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a38468a63477e6c7887c0190adc19fdb45b01eb6c510bf717ea6e0a7a7f2b0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCACL1652083.