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 0x74b9e079b112ca6fca42f888b9329eabd07a85e5ea97a83060bf82cd3b894db6. 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/57990737-d529-40a5-9cd9-40bffc29c597.json and https://artists.proofprofile.net/proofs/artist/57990737-d529-40a5-9cd9-40bffc29c597.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 0x4fe121815328d7db02621df59076c937363e08f843815bb87f2746f2465ff631. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAA020600556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0041492fa4ffd96ab3a47dd791bd31b0a92d77edf52167b03121fef3736fd. 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/ZAA020600558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba3a51f3e2ee8a6a90b0271d5e5c69b216cd0d6a2e50842d6c3fed7ddc5887. 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/ZAA020600559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cad52b80c35962059d3ce67938cf30b6261d5a320fb46545dcc3c75713b3b2. 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/ZAA020600560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc6ec31a99cfce5ed78a0cad1ff6e05908b81c0fa7f8ff84b13078a133bb6ca. 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/ZAA020600561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c13cead57686774555bbe3d8382bcf835a922b3899c79c32fc7315cb9f499cf. 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/ZAA020600563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb12151763a8bad5cb94427bdd6db365fb3f17f097e4aea7c447ab6678a751ad. 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/ZAA020600564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb727990a4dcdcf6fbf361f42e34f660dcd9337f9fbd048a0227c9031d0812852. 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/ZAA020600565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bb0f8646d03fcac6dac19bcb0d14be896b0f951703df63de8329cc0ec77d57. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAA020600566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4006417af33420a331fb37031b5c2063282d85ea16ee62c24c4c44ac236cd98. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ZAA020600568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ac9cf002b01933fbdb183cec655cbd5ffe66ac17d032a6d703a8337b17d89e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAA020600569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120210b6c81aa498f123bb176649c197f9025a55b694ee3bf85bba4303432e2e. 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/ZAA020600570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7f9968de0a3c421c86abb58621f08d9e8e439b32607e8e62cafcaf639b32dd. 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/ZAA020600571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fe4c500be520697453084925a61f8ba0a77e6bc26bdd77095857e202c992d9. 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/ZAA020600574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c4aa3f2bfe1ebcc3746824639f1d759c70a55e44b7e8a276920f09d84ce0cf. 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/ZAA020600576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abd63e7b63d343ca7899171510b5770f94342df9c47afd4e726d10e1ab3f4ee. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ZAA020600562.
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 0xf99217f3bfa8f0576e0fce3e3bfe4f9307d59aee0af65dcca513621daa588b5c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZAA020600557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a3e8b034128e5672fd75e4d251a6c8de17ff4ee548e5547b7e1f8011cc33a. 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/ZAA020600567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596ebe3ac3027323d387ff28f44ab13a5f35b08302c78a28fa3cfe9952c7554c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAA020600572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaed01cabe49985f3fb8911b7f3b449a9da96165bee80e4e4facdf9f8087bf9a. 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/ZAA020600573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdecec857d12a70a9f2758635c731a9ecf29801f0ffa657e04c8870a87d1316. 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/ZAA020600575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5b96a6c11d922fd55b4665d3230f319de528d340bfc9e2e7773a25ce2d2b7. 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/ZA0I41400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc660548b5c0024d678379ac5a5aac86b2cde3a68911279f0b9361e61e95b2. 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/ZA0I41400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28713b23ae8c8d11a70dee042ec8ceabae6ca9de5cf099e61fff08f4761a509b. 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/ZAA641100032.