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 0x735455722883134f65cb0c5ee6fed9e4bc5d64ea708cefe6ea1ca4ba237be2f4. 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/1a49f003-6dbf-4b1b-8dfd-387b40e53ab1.json and https://artists.proofprofile.net/proofs/artist/1a49f003-6dbf-4b1b-8dfd-387b40e53ab1.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 0x8c1d54e7b6462ed9ec05cc0c83696ae0557dde266324cf55d8443879dee5e043. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SMRUS0058391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd3d8c7798ba4639a57ddecc0403553d3a7b25d2dbb733a539583e140a77888. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/SMRUS0058820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf2f3bdbe727b06f52447b60cc1651fd159c6ae101c311a33cad5d769d36de8. 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/SMRUS0060580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fbdf96f4266037b6ffb57130ffd2a57b05ed5ce7a1e3e6bbe6dbfccab408be. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SMRUS0060581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec038eb84dcb9d27289f18bc9f7e8e09dc7e85b9be2e4a7de61ef1b5d6264b5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/SMRUS0060854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8e67c440c04255397d136dad33cf46c2dc7fc65e625f446be4e6d1ff55c5ba. 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/SMRUS0061731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb1fd5fd60529c8435b72ae782e35998172bdd50e3df3d4ec430ea309c1cb30. 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/SMRUS0062887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a00db4650519ca4b4d902ccc00eb03df3513741bbae14c4f085262fa9c72fe5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SMRUS0063181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eee6d21e6d7881c6cc72fb50e538b84c0c195ff8492276e63ef60b74faa1241. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SMRUS0064090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04ad7915e4778ad8ae0f9de345fcc08ca63a8184404f5c725f899c9817f9c55. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SMRUS0065248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed5845908921aa6c1f2485c59e88a8b60c37e2388d4e65987a2d6996d811a4a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SMRUS0065498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5b9317fd8efdd261d2391115d9f592c6db39e05d55261fde956c1941d1ac8. 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/SMRUS0066021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087f49c160f42c9d72d16181f9a40c5bf64a0aa487d8ca8ecf60d08470568f97. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SMRUS0066775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c4b213f31bb70bae09a7b13196f1e2e60007e4c8c9b20a79d51af4cfdaeb02. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SMRUS0067809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d1b048bfc6ec207e2b3b1ced1d5fca975e296fdbae6ef5d69969b491201d68. 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/SMRUS0068051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e7c4b695b6447df5368fd5e677a2f471b93d0c38983eb5b6e35cc753040c1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SMRUS0068048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c95ec2ea863ed64854f702c92bca27c5007b784c301fb927dd2b55fd76bb224. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SMRUS0068052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99f0c9af26fb5d5602b4f7e94f3e2d85ac880c3eaba68e0021c018c798cd745. 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/SMRUS0069604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9d455d8d7fd3b7162496c860abcb20e4d52f74a4b326ef59b3395e7bc7b130. 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/SMRUS0070030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a4bc672a7871c02cb0b63bf07f2da446047e5a744fb945982a86d68dec2f41. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/RUB422200596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b10027b24ef4c5383f1cff097164553a6e281a893cb8d1fe5b7f8971ee20a6. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/RUB422201308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc558513df39c5360e7e2a7a430557cdd458364824d87906a097573167cac80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RUB422201438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db004811725a16b5da92d7f8701dcc94ae5387cef1bb37696c681c4b7c915b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/RUB422202869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f14df3b2660d76639eea2ad60850d73a3d44d206b67b715e95e49ac5fb57e1. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/RUB422300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc4f0c82439b6882ca0e519d03a567d81f445559cd1dffca8b410cef329d32. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/RUB422300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5480936668091fbb634776f4d47c738722258bc34cf044990c363530936a54d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUB422302998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6493e634e2bdbb33d8de3b83fa5db84913bfb025dc006bc1dab8ae6b261108e4. 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/RUB422302999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f666c77398aece33e8588df04c1957925520368fdeb8259b63dded1974b3dbf. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/RUB422404088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbae9b9d5ba0426016368ef7406198799cd950123a786092e3a9d1ef7ee2f366. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUB422404090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94db78ee02d1771910dc7c17b05dc63e96251c0ef4002c3cb89195a1bfbd7d9e. 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/RUB422404091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc782f21ea235eea854a24d5f2480c2b30f37a3ef5e63e333e03431f6c2f3cffe. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/RUB422404092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27354e30959e6f4bd16a49c4d5d48dd55f14c28a58e06218cc8877737c298d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/RUB422404093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aa92055e0e93b218e3a7b840c3cb8b894aa8ab9a3158ea425cb522f81c5311. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/RUB422404094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d320617fec5be9311b87b75db91502fb5d904356e44308cf6427e37d74cdb5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/RUB422404095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751f9c5f063d91e8d9d506f05966e41e4c27c23888c9410307142ab50ba0be8c. 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/RUB422404096.