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 0x1cbb3540390008721725c0cdb07f54b4c9f20727cf9e3ae762da9ee8a2cb6f8d. 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/3b8debdf-5155-47c7-a597-b9ef9676beb4.json and https://artists.proofprofile.net/proofs/artist/3b8debdf-5155-47c7-a597-b9ef9676beb4.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 0x33bd22c623f722e5a975dacddb8972679e6079e1e8747e1a27ac40824afccc21. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QM4TX1851361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5c96f03c5d79181c88f40e7fa23175beae0bcea8826c9c7629834f5603f98f. 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/QM4TX1851362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81d61b17a51bab1b8d702f917d763545fb93305d9cf518f3608120bb4d6070. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:26:16Z), 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/QM6P41869541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfaf2020e7c2a1336ef891a215b48b9228aea4cfab45377426623699762581e. 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/QM6P41869549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a44c59e480ed5ac33d90929fab69fa378d11d5bd13f04a0875d91fe3be1893. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ES71G2311102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba0034ef2e25be56d43bbb78e4eb874b07317b37a8a16d47b8fe830f831a00. 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/ES71G2311105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e02c6a80312a1d3d34d6fadfe371c5c412613a2e7375df64b47313ea482a47. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES71G2311106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcb71189678bde8472180352d4939f8ec361a588d0d2c2d42c246189815c62d. 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/ES71G2311108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdeacc45e03c18aa22033e28ad25a9733586289f197c5ccd41b018a596dd06e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G2402078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e638301b00427868c8f10a8610ae1e2d93dcf7e93c53447d2247693c42d8b5. 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/ES71G2406444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aff1d1e4a3546c0c553666383ff29823b6d7dbbb647f6fc53e5b33a6618cb7c. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ES71G2406445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3fbcbe7d45f7d1d40d4546364bb501d2f9a31ac7e915c34195812abe2b87d1. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:09Z), 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/ES71G2404878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfb1879c0334afee468d1be9847a0191b63c4d585e8fc4b4de93ffaca9c1291. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:46Z), 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/ES71G2406446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b30cfb225b381bb38971991a7b6b857491d79bc3e1bc69fb542b8d75788b833. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2331567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0c030f63a43e43544ef7849285aeb9d5c531925d557350e43c00cf9f0e919. 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/QMDA61871100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a56aeac463bf10ef688998fa2efb71b28bde9f87bf9d790e6a9e3a56ef55242. 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/ES5152201739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f399ae2bcd82b7dd75538c1e3f6656fdcd97d95bb9e4e628a9ee22c0efa21e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6541979465.