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 0x0b1bd89b76e080a641c7b5dff929768ac02e9b6a2c41e91501203fc17d950958. 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/4dfb2cef-3e75-44f4-821d-5a15a5287bff.json and https://artists.proofprofile.net/proofs/artist/4dfb2cef-3e75-44f4-821d-5a15a5287bff.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 0x31dabde3d60fbbb16de9842017253b6394fa6f3d51b50adbc7db5de7b999a67c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZFYW1984476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840a4dbb233cd85e30f4f6aeee6da6f6592704eb7d045d1ca8f79a13dc16f027. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYW1984477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9a4b6b2ad5f3f48337683c2db1b7d90e1da5453cd15467abc72d61ce49cf33. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYW1984478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5422b148d9a643aa22e7bd92088cc5bc5d2e14489ceb1ce955c211340b20d08. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZFYW1984480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2f851a568463ae6879870053b2ca03e38357438f1173d16b6e4be70949c336. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFYW1999669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51373c277255d4ad2db6e53a1fb67c4f106e6c0f27a06a878b28edea67de9493. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYW1999671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9721397a69c49e48c909426577052cc10582bc23eb11f13be3d44a0bc2c9fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYW1999672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5122265e0e8ae16d153ff17498e67353362c59fa65cf868bf029e1cbb538fb39. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYW1999673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07614241ef2f528ef553acab6122c8709290f7c01a2f60bad33de981bed6c589. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYW1999674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37992eb581a8d42d7e744184359b9cffd57b4c185f6430e8b133be5f24123a3. 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/QZFYW1999675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01b93fe8b36b92009251a99e5863d982e6f4abd49f55af1cf977cb7becc3d5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:29:59Z), 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/QZFYW1999676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e2ad992440de40a15ac754af5cbe5335c6dd4f236e4e478014dfe5e0aaff43. 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/QZFYW1999677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa94d5a0affee7fe9a822a669fd543a768d04e5ed59387a6c8eaceab2bbee4f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFYW1999678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3810338f8e81381dd3e05b637710bd0e5da260afcfa714042a6050d6fdf52fcf. 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/QZFYW1999679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed4d679537226772da722ce1fcfb2a40517f8dc300981ce73d23107ed041c78. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYW1999680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3557a5e51f2fb135fd947bf6dbccb564663e69f9ec688907f284bff987a76d4f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFYW1999681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8b5175b40aceebd9044b04fcedb9b4b6b6c3e87b1b62238d2552729ef7a42. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/US57M0532413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0c47e69bbbf5e1266e463949bc6db1670a1906e835afc81e7ab1856aa53e39. 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/QZES82107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56722b69861d1f53ba0d3779b1ec15b37172ca1028581612e810021941d12116. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES82107004.