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 0xb41904a9f3dbbb1480093333566761f863387b89e94b66b96a413ebee65739c6. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07a388ae-5cf7-43a1-aab6-cab256a71016.json and https://artists.proofprofile.net/proofs/artist/07a388ae-5cf7-43a1-aab6-cab256a71016.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 0x77bdf00c990c7a1b810aa3c32bab4c4be36d3112fc29e080cf3134cbcb72e22c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:19Z), 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/DKD3Z0019852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b50b9f6a8b5882ca0f947b535ca620529969a3e9af6c94317512d358b7ba88. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:01:06Z), 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/DKD3Z0019853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedb0e394a99edbf8f319656ebbd4a18612f001de65bfb3e1993e07ecbbb7663. 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/DKD3Z0019854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2445c7544ae5935005ca310549b3ab678d6b70d960d3cbbc5366f66a9ba7127. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:08Z), 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/DKD3Z0019856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe980aa79fca886bd71ee6f269cceb8ca4fa56ec9cb037e944d9ee351b3c91bbb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKD3Z0019845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4693ec2b2d776b559a118ed514de43e576ede857d43ca8feeaefd5964bfc3c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:47Z), 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/DKD3Z0019857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0dc1c9ef78cf1edc628d8db4c4dda242bb1ca298d0fa4cc31a24fbf257fb52. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:19Z), 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/DKD3Z0019858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c81b484d9de2ae178cdb8b93907f54f20cbf525539dada2c20ec9d60533fcc. 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/DKD3Z0019860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9f5796d9779667506d27aae1886617ce978e0093cde836979848440d992b2d. 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/DKD3Z0019862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416b7a49014dabfdb4ffbedbcce0318fd6ae4bf5fb20e15ed7e9a4e8ed59ad2a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKD3Z0019863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e355f8309c39c2e904c7ac77db3f28621af0b2f92e1df18b67c787ec29b4c60. 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/DKD3Z0019865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863d16111dc0f3a9fc6888deb0d79830bc1c111284e886bc9a507829e673424d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKD3Z0019867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac70f8bd15763095cd48b88516d923a4333bfc364b9b169d950b7f5a970eca6. 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/DKD3Z0019868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032745348aad8552844909aedf55ca9d3522b4ed0316d324b5fabf6e64fe3ce3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DKD3Z0019869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65ed3a0ab45e88ecf2843601d689167d848c026db5f66d8f43f8418e361538e. 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/DKD3Z0019870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaeba9d5a29e01ab208159460ba6354484335d51f0781a630b9039b46357fdb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DKD3Z0019848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376631ef4297174f300fff3ce098fde10a1fc536b6242edbdd3459f86872effb. 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/DKD3Z0019872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5182b6ff3e448614f629174647c78ab6a8bf9016f2f5a472fc8080e335f8d9a. 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/DKD3Z0019875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed5d3d85f78a12ec2f6492dfaec9f1c353192a8c00718b157b91a9533bbb3d9. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:09Z), 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/DKD3Z0019876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79db0dd59016f7a325b83dd7f5e2048b3a151b1e3354ccbcc5ef34fa2bb0134. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DKD3Z0019877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414eaad9d68df38bb00000eeb95f28cc0b89ba01a9cf7ee50872b6ec8fec531b. 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/DKD3Z0019878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac135c35395d47c5ffc57550ba693b3ce373832424c3549156632e6d6bc56065. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKD3Z0019880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9fd3bc62db47cc6521e49d1078c2ecb6a4f4873876e578066d9ff45b809b3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DKD3Z0019850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5286a986b9ad727c16162562d52ee216aba76b78495f84c0ef47afc1aca0467b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:21Z), 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/DKD3Z0019881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726ddd9a430959e7651f41185dad024b9b2c560217fb95bbe9cdb74920a28e82. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DKD3Z0019883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11852128f3bd564fb3c9185d69105591ea9ff12a36b0bd006b6b20562d485e83. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKD3Z0019851.