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 0x854a0da32ae77a2f95c389069b3c74fd3619df56c1239d43e0474495d3e075ad. 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/162bad74-55b1-498b-b415-30dac0bb8b53.json and https://artists.proofprofile.net/proofs/artist/162bad74-55b1-498b-b415-30dac0bb8b53.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 0x81d2d001439c8a84c3ca87a2bb9ac74b5e1f5f0867e01b706ee2164473e52d45. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZGLM2344026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bf81ea7ec8596bc77732bb7bd04c68d8bcf5a1c7573a78e5376b57debe249. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZMZ92304178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a74f96b8a82157c453e8011db4ecac54f84b68a0ae7be3611057d52335a8a0. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QZNJZ2301431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63d64868ee41bd49caca140c06647a26867f363d1735ea1bbb4c5943ed4ce8e. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNJZ2398387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23089833fda76e3e6fe0684685a3a23ba83d064d3c4447f9103b1742169c94c5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZYFZ2388172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e67ce10916bf575b5cf163cf37c459c1ed9bface80a3cdb5a48f6d012e7ec1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTVM2321683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58facb023d2ae6dad40330b7071222ea58ed2d44b7494c1ec1be987ef3fe4c6f. 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/QZW9K2399893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ab586f5d0d0b749b8ddf48f4c8e300bbef9648bc58fc598ee36e718e742df1. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/SE66N2311059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d28ce5ffdb950b733b487f30610a49560831dbdac9d4a3ddf32380e23d3896. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/SE62M2356241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a6e5117e101c076f461208b63d5de6f03063150718edb6f87685bb607df33. 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/SE6I32483147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c494073e62a474938545d870b3e41996cd664ee34205ce4d703347c1dd7311b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE6QE2408924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f28fbf87a9e001104b180d6af94efd7ad23ceb7d6449c7053f5d4a975fd9f0. 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/SE5BU2454873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc395debb7717fedd8f6d23ad26ac31ae24bb990a36b2edbfc7b1a70383a7082e. 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/SE5BU2496272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b11e7dd17c69b33dd83ff50c339416e024d7b7a03caedf9c8e60b0bd1091d8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE5BU2499320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf047c19fb2b6b644eb681a0e8be3f5733871f4067df83408e54896887982176. 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/SE5752420551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2938f09d5964055c616468862c252bbcfadd0116fb325fa656fe4ede94e7506. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE5752446318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea37283ab75d9a9fe7de551e7a97b4245585902ddf9b2dc81ff094b3a4bc785. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/SE5752438765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d04d041bc961632c30e9990a1ab82d2579239630d611251176b732614a7b74. 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/SE5752477078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2da01aecca745e56249af725da88d000c261dbc44f9774636feda858d31865. 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/SE6HN2405474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d69b5a1ca8741b48f1e028ced3884e45ed2ebae1eaf173b8c9b576430d6d8. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/SE6HN2439657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec1508c1ff39e454173704b747a8957b227b697218a25b75939ca42052fb09c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE6HN2463396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c8e61b0ffa3f1588843744910a8547227661004444a7ad0f1d17ce51d4916. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SE6HN2479884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb77dadf2314b33765877175d1decbd2edbfd0b69a209f91cfbb398b63eec854. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE6I32435462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ecbad908226e49fcd6f04c1f608d89c0f331743bd85adf4b6c6c7c83c08e0c. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/SE6I32436575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbdf66bfcb05cdb8e4b56b1d4fcd87e343698a464dd67cef42933f718b3c25c. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SE6QE2493220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeffd368f4239ab7d361e1bc12f3dc120458fe65ed3102a200f37758b333319. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/SE6SA2425980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72534e4ecd8496e35278d01a4738b898ac74d3ba6908c7081899afcf85ef9fec. 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/SE6XX2523951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7381b6ae2f65530edccf99e3235b5c3ed2afde06033e6670697f836a450aa4e4. 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/SE6SA2515103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6bc7f615fe9529d5cbbf39bfe774ad81d4d4ada0f2f7e22058dc740055ae14. 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/SE6I32551768.