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 0x3c7a6b8c7a3685621d7c8aa0b8bfdbaf342705809085bce4a3389ca81cb52c97. 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/e7f233a3-36a6-49a6-9572-ca53d0509832.json and https://artists.proofprofile.net/proofs/artist/e7f233a3-36a6-49a6-9572-ca53d0509832.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 0x2d3ed8c10632fcc470e7cebffc0a4463d4c91bd3d954e07075d64fab2458fc58. 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/CAGOO2058555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffdab58caafb858748363c771bec9a46ea6026acf4ad03addab0ce831c001c7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CAGOO2120548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc359fc757ab1195531aff677182c1564777d52b08e97cb7152e7a5db66e418b5. 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/CAENV2271746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b158b6b1fca2fbe36b3a53e430eaaaac362856b1f1425bcd27804f3d64c5c49. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAENV2271745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fba21921fe48f36222e46243e6371306c9dd5eaae01c3f2794cb8db3e94aa8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAENV2271741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36eafe49e95d82aad3b5e61e6d94ecdbd782bdb29db6543deb5dac207f36ba7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAENV2271743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef65f42b38afde1aa9ebcfe3049116a2bf404372293c11c409767c6fedca32ab. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAENV2271749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cef721a7f6885070de688801c0243d7474a0919bb1a94ff3e02c4cd7271a84. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CAENV2271750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb395470caeeea5d9e66110331f8afb77f42e9ed4cd24ec26cb39c6409d3a5566. 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/CAENV2259257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492fefb366105307218a67e73d1d86474e1d5bf9250a0c8da539287d6061da4. 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/CAENV2238989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78e4c1abd9dc4e8d29ab5c40221ca83a440472d7d74b7771ebe0a98497d3536. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAHQJ2338583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4018fa02abf5278d0b5a30f42e9b0bb863840edef0fb45e6558d6fce078490aa. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/CAHQJ2338591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdd21fe94271f8470be8d82fc9cb85b73e23a0a212d02690e0ad1d5683267c6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CAHQJ2338592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b16739aa660dd33c976a89e36c809caed2b82f2748a079d26fdbe0e6e06e41f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CAHQJ2398565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8dcdfd654b7530c7edf6469b04bb2dd6df49115631e337299bdaca3af4ce5b. 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/CAHQJ2398578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488aea42a48fc1948e764427d4e63e86b3f450512c3634398f18f747690d0037. 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/CAHQJ2398579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8e53efa8fcdeda746de9c2d1c317296a7d3da9250ff5ab175558d8ac3c871d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CAHQJ2398591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4d6c6d0a5cdddeed7508eb8d5a2ddce213c7829910c5c48f89289846f088f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CAENV2304128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd55b6b77a5433a3ed669b51bcebe0cc4baf3c9d8c55f4b23ba78605728c6665. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAENV2335901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546465151bbec6d6190de4a9aff24d8a2e1a37945df533e942f99d41ca783717. 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/CAENV2399174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4382da95c3669889bacdca16c389504cfe7e65b10a2883a83a5be2b69d3e7e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAGOO2341211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eaaa7103cf6992e86305bc36a34820969686ea4afac7e3fba281b6e0701312. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CAGOO2341215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2492925a0a583abc21fb7aae9d8fbacd13e1d94d614f60eaa39ef127866c10. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CAHQJ2415893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b16fd098d0bb194f40ad59e920a8164fc8f784a5afc53476ff2b7c3b33a442. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CAENV2436904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8640281102138eb74da52015a7be6db3d209eb20d13365a08fa18a4789827434. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CAENV2408881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8622dc3139b47ce303bf474ef43bb7111de6815544a29756b022db00780672eb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/CAHQJ2481047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b620b0a2acd23b3f9342bda1f2ccca43162103d659e312f21d712b423dff12b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CAHQJ2481013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7619c09c4f5a591ac814d72c173161e7dd049fd2354c49f9bb7f71987783cce6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CAGOO2428473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7201ceeb2a116173d5cdc0b6c853d96e24877aaf896ebb41847466c8ed960911. 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/CALVP2401891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b1bad38e72ddc64bdf12e5130e9b06c2475951233ee0a484005b0695f9408f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/CALVP2492427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07a8dc55c2e9b25866fcb4f2de2a968eb61e9f757302845da4a0be372507c1a. 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/CBEYJ2420395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf833327de672b4d6c84849ab0c6bb00a1e2f34bbb92ce597fafa69e89f84ca3. 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/CBEYJ2469039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe2ed26784ab0854889bcc7ecec45f6f7a6b17ae9a12ddb42f5a9bb72d61d74. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CAHQJ2580278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d84e0a85a04be9f53b7a6441a515dbb0c3c48f3d3eda05ff0d9f9348c90d7. 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/CAHQJ2570351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c628fb70c165f8a97c779854fd72a02fd08afd8c3e8f007eaca53ad6f07b3e4. 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/CAHQJ2580275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c38d9cdd6bf31cd5c92cc6ee735b0094b6f7b705d308b2ccefb626993aa46a7. 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/CAHQJ2580277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aab1bb7879fe8d90e5a1b25e112062ed34243dd5165cc7c88638995670384a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAHQJ2580279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf833327de672b4d6c84849ab0c6bb00a1e2f34bbb92ce597fafa69e89f84ca3. 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/CBEYJ2469039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412de785b14fae0359311ef44dac5076263280c282edb7eaafce9dfcd6332e88. 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/CAHQJ2580276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c77be671bfa79098c316e213092c998183905d9ccfdae40108c28ef9780ec92. 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/CALVP2540145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b0516275b259bf7dcc9dee33e44c1d6b975c9bfe027cd8be80040763d04e90. 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/CBF8B2502528.