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 0x6c53a2686a94a24a74cdab1ae173dff6d30024310d55c464f1429003a021ec60. 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/ef337d51-b7ad-4a07-9ffe-a5fb64566818.json and https://artists.proofprofile.net/proofs/artist/ef337d51-b7ad-4a07-9ffe-a5fb64566818.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 0xbf0c342af20518a601e264d634ad0079e747c76719efe83728e990cae1fa6a1f. 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/AEA0Q2131428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3da8965be334adfe2d92366496a27a1329b897f4682838d3f1d08cf6912d8d9. 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/QZHZ42153253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec482aac8bb4715a8bf4e9a1a9a81625d4cac58adfb8deb6a56cfc4d3d541e1a. 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/AEA0Q2143460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0458608415e22640b95cb2b33553f34f549ba93d0a7153eb32703fa9644835. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/AEA0D2132599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc3786f6c77b05cf5c19a79e0a00e64fd9e9159c9c77ebd31162645fbbbaae2. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/RUA1H1832558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7604ca9788ac58a832eb3b01cdba8987ecea0a1e7b6c634993b0bfd9b5cc43fb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUA1H2286351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3445fb6bd84dbb2eb66bf10154bb2c62d21c23038f38fdbebcde8a33f9c3f2ad. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/RUA1D2296271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fa6690a9ca32d9787d010eef972a3d338418bba2508ba78f71be7ef9cf7255. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/RUA1D2301313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9c842a936cdfc7eaa51e1b566af3700ba0639113a71697b73a5ed7a9476e1f. 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/RUA1D2319162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc61ee0bcb975e1a49ecfbd0105d622f3e6e1cc6a7766361962a40389a871df. 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/RUA1D2358231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3efb2bff1c20d0132e69c453ae63732154ce5992910e73b2f0309370a902184. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUAGT2300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04152a0093eb3850eb9ea094e5a22f5cc24bba68129e515ea516b499c7b6a83. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUA1D2479380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96427ba50415ea88c4e44bf8af78c24e55d55a1429d433ee9bf69fcd7cb11830. 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/RUAGT2465608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a03ddd86464cc2473f77b835f3e648621cd568e3684425e35141dbfb7586e4c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/RUA1D2507141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0bfe5d1db002e4f14000332ca710310f3cd98295ef3bfbedc7ffc343c6a46c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/RUA1D2549132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8ff847a3a4aef93e85523ec110960e192e93450709983daabca3f4c9bc4e07. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUA1D2549133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc3abcc429bf95125b86606a157116bf9e2e596fc451f10a538d6d19ef3c23. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/RUA1D2595167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceca0944e3c6797dbeb37692c021dfc9071b49d0d6fc25efc3ed370390319cc7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/RUAGT2521022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71962ac4305886c7e76797544a399f944398dd5dc96385f6856b374aa98a0a8b. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/RUAGT2565857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5046002d875bf214a2539a073ca0529461b829608fdb14f5d88103e08c7cbb98. 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/RUAGT2565858.