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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 0x1fe2a9d5642bc2f7856123dd787d398361405098f42a41813a22e72ec911b7d8. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50661387-4724-4b69-8555-9ad853fb4ea3.json and https://artists.proofprofile.net/proofs/artist/50661387-4724-4b69-8555-9ad853fb4ea3.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 0x0263e01ec4c75795962734d1f687728af63433eae86b2934cc4923d120c73dff. 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/ESA011938415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560f6e9d0e62c4e13db7be7ab2b5dbbbf7cf814087a2ad3395f6465acd811b23. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ESA011938416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfd95354744027a42c2d95c8430786d4c03c666b8b8bc59048499ff737c0072. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA011938417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e3379afd45934b0a989bd8bec7399c5f575baa6aaad63fbcf1b1f57145aa3e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA011938418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83cc2c544e95e724e2df1c1781e4ccae93bc38cf56d04531786dccb82f66ff0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ESA011938419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af2567894490ab140d5de3be5a22e6fc41c76ca06786d4e1f2c19c906774bcb. 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/ESA011938420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237a873e36fcdaf87bfd9ed4c5c80a54d789697fb3dc98c69eec06be07fe62a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA011938421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cb3965d4c7bfb0531443e6c2f6a0e0bc5f4cf2935ed463759a5078c404dd84. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ESA011938422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503149dfb8128e5724c7834de08313aea7a28d5325cd3c32709736265f4dfacb. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ESA011938423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab266123cf7f24c302c56e6442dd8e3a0d85fee433dea60c2430d90200a73501. 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/ESA011938424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3052beef299e49a7a2bf6f3695f3a4872291dbcda193442f5618a7c1b71ca70. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ESA011938425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6412af19eeadf132619f92fe416acbf9f95176c85a4f623d2d8f6f75255f7d02. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ESA011938426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50125f358da04f92d06c4071f950a8b34c4cda6b08776a63f175a85970621b8b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZFYW1917604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39323fe6a0cd55070fff0b5ecbfba962368d6ed732aeef2bbbab5237fe818b7b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1917605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab07d234539d60054e911d2bfffe0f4cd0b60a20359c16bfb7953f6aa0fdd06. 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/QZFYW1917606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2b8ad65d2bd2afbbdd6fe5960e6b116a5816089f9f12992a8f0932740d4ddd. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZFYW1917613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9740af80d5ef1dab561e03da048fd53cbae3586c15c736ff3f78f4815c78df62. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZFYW1918799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1dbd727a7f0279398e9a9fbda2d92de32bd9deb2740113295faec96500f2f3. 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/QZFYW1918800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51209c3c577e810f3d0163da6b8bf3ab44f69cdc15b51335bf8b7d7e17f58099. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1918802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56281edfa2078803de0d87dc54f9758aa6e5de22ffccf8cc6bde0ae250f18d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1918803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb51408f863e2d71ace98b8ad8230e12d1a005f7d99186c0dc3f2720d6165f9f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1918805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe327b356102b2f3feae3ecfd154e19fcf59ed1d869c4fb6519166f55a87306. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1918806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2920dcd33a873cdbcae55355b99f54f009283dd6e63d91058f5c5996b5a94d9c. 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/QZFYW1995569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc686030b047d8a403cadc155d4a9073484ec57898d4ab08f020a7c60074c938c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1995571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122759a5d2e7e9557dfccab7ea5ce54f6d37f0da633c65807dc1bdbb2a4d31f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYW1995574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa31f9f175e8a9c7edd8dce843848b7e80787f875576e9b370ef235443b1ea7e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYW1995575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4b0f7c01214134e58c6f87b63d680fa1998e8808fa1c4a4154473e7de62663. 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/QZFZ42276820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cab99240653d9cd15eae9eccbff6a4b15f4bb6bbdbaeea1dbec3d2ab3c9158. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZFZ42276821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f654dc3da8f577edc0487623dbfa16c754d5df04982f38ce323ea2b2d29a444. 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/QZWFM2411582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7497d60033c8b5aa38c1bca4ba01ef0ce38b225e68ccfe808fc55b2d8c9006c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZWFM2411583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f333d53e0d84b326e660d83aa09be65ed6bbb8e60d4476a11ccdcbd2d4bb6eb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZWFM2411585.