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 0x92ae6c359cd4412def6b39600406763fbe18a023f2054fe9b57634319b46b54a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9bbc3a3-ed22-4b34-9d6c-a0c0ad88f5ac.json and https://artists.proofprofile.net/proofs/artist/a9bbc3a3-ed22-4b34-9d6c-a0c0ad88f5ac.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 0xc5a2ccc61bd5643b39441699ca27c99419db3f86411c7ff86a7999910ff36cc7. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHN82183383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8aa59248c757d0000feaa80b3cefcdccda44d2e3b41e77833e3921e996e25f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6J2415213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a4f6d66315e6ada6db5dd1adf67ed7d72c44a9dacfafec427d626266dba106. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:56:26Z), 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/QZWFK2463294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6567e85f7ebac7d06e350dda294cb5d1794ac620bc906c71d35a223074dad6fd. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:54:48Z), 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/QZZ7N2442275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd98b1c5ece59c89ec00a76d433c2041b2df9821ac6a825d924876ea3eae615. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZFZ72560684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25322e891dbb2691906afc8bfe85aed68e2d11c8e72bb5fb8c4379fe7921a9f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6K2502833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f36724afb35d526ae64ec9ad894187b60e937c387b01aa59e9007738a26960. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:23Z), 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/QZK6K2502834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa19f9f6aea175b4abbbb85efa9dc60d90c7b7f9a8cac953a6f8fbd01205e22b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:57Z), 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/QZK6K2502835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba23e7febc0fa369708645fbca0fbb8cc726476092033dd5797c3b0f9bdbf6cc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6K2502836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb896af10a4d175664dc0c0dfa114716bb7c4d44ca953c020e1b6dab332009ff2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6K2502837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4eb378cd7dbb0a2d1fb9ee2878b5c9bfbd9ed5654e056c9a560eebe95810b0. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZK6K2502838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a421fc730a475b7938ffa1e004d802697a17fbfb3c6d617a19860fbc130940a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6K2502839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0353e810efa8802c4b217186b65a4860b91c47337c071f6d6ec5996521b5870. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6K2502840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cda7471382f8a6d9846691cec2844baccb1f9689c05c36f403acba77f771cf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6K2502841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d14dcd785247b82a292d68048d50d5a85e8da6baf447d7f130b2542f81bf9c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6K2502842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac90378e983cc0eb207fc2f17128af5635397b580cfa633676de3f949a7c6b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6K2502843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf2f08eabb95f7e766c6063735278a1091de5c9b68d4257cd534dca42c9700d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2502844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a605bb2504e7901f4e314fb5364ecb3e77ba4dbb9fa14306eea7d156826cd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3FA2545203.