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 0xd9152d46e50307ad2d550d56174ddee2455d4a745f85552c77e390b3a5767a94. 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/e8bbd070-f0cc-40e1-a360-b81924755750.json and https://artists.proofprofile.net/proofs/artist/e8bbd070-f0cc-40e1-a360-b81924755750.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 0x01a3eb23a580f2c3714ec453aeb080f33a3977e039ab77b2cf28a35500bf65f6. 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/USQY51186213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb27c410753770c2de9b614c5ae7b47feee75c70c90a94875f9697dcccbd381. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USQY51186210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2708d59d5b066bfb9fbc613d6f30bb127fd3fd0d3708f0d401e12b5ec9795e1f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USQY51186209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c5bb6a2a15bee8868d058da993d5dae729f9e9973412f6d4d404b9fdca60a7. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:28:07Z), 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/UKACT1843914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca55ff1605625a5b5c50097a51f2a26f02edb0e181acf14cac562d6c87dacd8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:49:31Z), 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/UKACT1947976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a352e9a1b8eb10ffad4836904e3a484fb86418cb81b04a7729af844080144. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:56Z), 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/USA2P1960338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2e2942cae7232bbc0bc71da26bfce31007a3ee253a42ffc79b315de3937ff. 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/USA2P2024012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d24d54009a727e8c3859dcefe93cda346a4079d3cc173933cd8bc289aa18d1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USA2P2103373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af0fd7a2003c6da4408448dfa0cc8e07cf0c49b7d58453c33e51dfded6e115. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKU932119301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33485fdca0e558aebe7ab73c1aa10ce7df9c282a25f0d2e0eb3ed123a7f10ec1. 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/UKU932119302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6543735b16e138362387adee7e9dfa5c2408fbf01ad6fd08dbe76c0a67350157. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/UKU932119303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f755e1c9901aeda49682951b0be667404998d2723c76d67c46d44de3ed1c76. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKU932119304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe972a121057a1687df432428cb1c7c0e5df7b93cb744d2c943e638deb386c55. 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/UKU932119307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eaf321b474b2e6cb61132e384dd7d3fc908672e7a6d52855acd805db16beed. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:11:32Z), 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/UKU932231637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd53ac12fc7fa9db79eb675cc058e6134fdf2086ce31d96c998366c6cc94662. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USA2P0600251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252629e9b679eb4f17a765660e4614c3a5342ebde183fd570e2ea5898492597f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/IL4060900952.
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