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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869329bbcb55560fcc706b930e420d905e5cb5b7a1432ed6bc767c643273e710. 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/97ee4d42-9fce-4d10-aa33-8fb9e9224e34.json and https://artists.proofprofile.net/proofs/artist/97ee4d42-9fce-4d10-aa33-8fb9e9224e34.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e5f2f29ed5f90f59a17b5fcc2b3be1324539f37872e3648d0c2563612a655c. 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/QZHZ62065838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82507481e19107743997b8c86bfbb21819ccbd696b3e03aa5c91987ead45ef7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ62065839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a87da7d95beeb79539c1191f3c57079b31daadb0c78af75d844a078a3c899f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ62065840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e5f5bddf84dcf7f59141321d464d008e1650e2181a9ee1b5fb5d82cf8f0e8c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ62065841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa933e98e9f698fab91e91c12f2334222d6a43e935ad58e1472f05a19852a4b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ62065842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666d29fdd2a35b103de08ef402603d9ca72fdf784a21368d29c1b4dee532b33. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ62065843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d36211ae22b58417282a9c17ed047b91a9a54205175d03b307559e27d2c24. 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/QZHZ62065844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8b935ef5a0f2f2e5de1682004fd36b8d2a5e65eab1726682c7c68eda382afa. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZHZ62065845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e94004c3376afbea546fa45cf3770332c293d1e2c732d399ab12e5295eaaa76. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ62065846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f67eea2ee80174e9ab41ddcd0ccb54f4620837db895b540231938ea84cc0d. 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/QZHZ62065847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817d1d5db4112ae19440deac1cdfcc9c6db634678c38ce9b786225fc89568512. 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/QZHZ62065848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa505a5fe113b95d87631f792c3d7ea3738fd3f7d7f60589bfb25d02e385a428. 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/QZHZ62065849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4487be24804a570c66812ea3c7a930c59cf1069ef88807363edda312b96034d6. 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/QZHZ62065850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8e22159df28aa51f5a59328270e97282a6383e8dd52af1ba92156c8a4fdde4. 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/QZHZ62065851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88696a57a5a5a42ea4376e5970aa759b737d53a7c0ff36a9817d2ce9d80abade. 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/QZHZ62065852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846d06c95ffa0264fe437b1d7090a89eb208a6551ad7c15dd76540c6ad8df1ab. 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/QZHZ62065853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cd8bf12cabaf1fc30a36326f9a60199d99ddee52729dd124b8f7af79e1f062. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTVM2117993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ae8bfb907a74fc077aa3d1ec0451a1b4b3ff0fb36ba5187f8c504a65af1c0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2298088.