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 0x5c107f8832c64e38a682c5b0559397c48dfd78671469e19fdf56e5481d3b6318. 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/b6e6e38c-4ffa-4618-a6e9-6dcb6a4c994b.json and https://artists.proofprofile.net/proofs/artist/b6e6e38c-4ffa-4618-a6e9-6dcb6a4c994b.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 0xd0cbf92ea66f243909a0fb6781d2db3c7136604c4c6cec4c2214dd95749b4b0f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKPL1801836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863eb445a410b2b50854fcfe14c7d5a176fc9177960d2020f439a202a2b3b4de. 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/GBKPL1801837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f0ff67382e96c97b2c92dcf97285391e18324204ef2bbd74ab64efc18f2d3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBKPL2010222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa67e026a0ee29c14a80f50612a7d2a8e75ce39fe023d9257399eb6db260602. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKPL2281268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f1ebe0ef724b2c4e5162dfd0808bb095b0550355ab64f8d80c41cdcdb48d8f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:31:48Z), 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/GBKPL2097569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a88550ed227557e2597b7b8ff1fbe387fa278792fc0771e242b79383c656fd. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBKPL2281267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e178975d69c35e2a89e17a5fdd59274c23d091037ec2044f2aaa07da9bbc19. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBKPL2281271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2e067bac35e1fe48c038695f7ea7a180c1de593e8cb5e922ef07a662c36863. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBKPL2211281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92a6a63794ec07d896f6ee2ef9109f2edd79e627b85e7d8f3316aefe7631349. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX4LG2300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02508a0b4bdda532e6518c230972199e649a5215a07b977c7668f78c454f42cd. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:00:59Z), 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/GX4LG2300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c180b732607127a2ee101357724e6464e2527335ba3b1c3cfdfc97668b7474. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GX4LG2300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1fbf6f62fd19596c9754b8287eae1a5c4055191c4e330a99ddcdf8103d05db. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZWV32473713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4fa7b14d1a904a63c8aae8045a8a96486146861224ef768def7b296c592e68. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ8A2462960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d6e710550a97a8dce6cfb9b4c6738f33de6dac208ffdb11ff6181dbe94f76b. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QM4TW2581279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec71a6875bef6eb75392b72895e7306853cb2516df4e2ad0e4121e8595cc58d0. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QM6N22535893.