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 0x9023b890c5f785b8f7183d541ef70e4b6418e51972a533ddc5424ec7b311a09a. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/026dff4e-5337-4beb-8204-1e55b0422fef.json and https://artists.proofprofile.net/proofs/artist/026dff4e-5337-4beb-8204-1e55b0422fef.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 0xcc58dec89ad1ca22388bcc9abb0bab6b9321cf136c0e946b8038021e7bcd52b5. 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/USY242410313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b369dc3cff7a53f20d3416242912f068b81a454c54e9c94675003d209458d47. 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/USY242410314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf4b1051b65864b7d51fae60a919d3aed4bb493847c7af376f9c4764790155b. 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/USY242410315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43083cc25321c0d82c7b830b8a2eb6b91722a6aed7241571b7a04897876302e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USY242410316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e761b4f4ac6d1270f754a40cc662ebb3e105ce2f4ec8d1e0646bd6431e7d7a. 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/USY242410317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6887a7e94cbe3ce4035375e2f0277090b404ed0f5bb4c2af61b3a24e7a6d8b08. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USY242410318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d97ca91a917b8e7a4591edf54ecbb768b26ade95b892b8a3370ec918a6d124. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:23Z), 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/USY242410320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccc377ba2a2bbacdf04c208a464dfb3578c7d54f934df81541d86d61e4e2faf. 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/USY242410321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebe4613f5ea57ab7299997aa845b04ad9134060f1f1ec125d7cb1c8a94d7b52. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USY242410322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9d512b9b5ea6cd4fba299514f350778bd8db588a4c8a27a7053af91efe9a76. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:27Z), 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/USY242410323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0cd126600047312003b3bf15a04bf57faa4d084a586ed8c3148f3d84fa2b2f. 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/USY242410324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce80bc5a87b40c062fc21aed373ea8d18707e0d7cba77a239b23cff5e26792. 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/USY242410325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c423e5a597b62dfa6c99cb8659589e3a0fbe6f0be951d6e3e90c01110c6de. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY42579070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b2399823100221309c53b0ec3a795386697a79a5b272e7f06f4db67b67bf3. 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/USDY42579071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e98f3f260610cbf4ce4759d87600cd98bd7e7ac70a583557803c9a8064ebab3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USDY42579073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02430650d788a78bb598fe00fac1f6f0d41f37f7d390a694d7aee01aeba2962. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USDY42579074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd80362c23d1e13efdf926876b0100824607428c468d21b7410d0227af4b7cd2. 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/USDY42579076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc7f31b052262754edbdf1e2cf601b3af22d6435d96e5197983e684bb5acc8a. 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/USDY42579079.