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 0x5e9a5fbe754148aa5b57c3c2b9de157398bafc7bdf219dd966463762954149ec. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50333a56-a6f3-41d7-adea-47315f76abdf.json and https://artists.proofprofile.net/proofs/artist/50333a56-a6f3-41d7-adea-47315f76abdf.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 0x450c911e2ab82b4e2e722dd0e0b9e6255ef6fdefb18574ebcb633dc20c37764a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ92093529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f392988b53cf78373cfef8558e9e4659aadc58658b4b1c0f74843f84ae319f. 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/QZK6N2097035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f31c526e25cfe9f43ed81d64cb1b3cf8b88dee204b256be6f78ad315414f74. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ESA012108247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8ff3991f9daff517c65ba3650e369c9e7b58e1b2a4230d3bd65542004b9131. 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/ESA012108249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0477edf9db535ee66631136cd5a50334035c89765aa511992105d5f4a9d2c5ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ESA012108255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc0d1d7826bb67119fb57b850ee08f64fb81583adc513bd5ea91cbdbbbafc5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ESA012108250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d0afda8034afdb2479347ca06789a249a59faee346980bf63abb3e55feeec. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ESA012108245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5daa2f73643bfe6761e7c4ff290054b5c5daaaf442ffa7f4948fca403e5e72. 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/QZK6J2017886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe661ca636e77a3a91193d4ff6c0a759e4a165bf7082b4005d5452cbff5561. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ESA012108246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f32aef86be485b36749dc98471afeb2b694da58d670d372a6ada45ddab893b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ESA012108248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c69c594724265ae0723a6d725bd7448512e9523f28e8cbeeeab82db2441bee. 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/ESA012108251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b6af9ecc78cfae95a4edd2ea294a20319f790a632f8411f0dc52f325aeb788. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ESA012108252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f7d508d27cda174932300b945a35bcc2d003e3704dcd3b2ce249969305f662. 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/ESA012108253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55fc3dc210fb9a8398f417b7d0716d09e781cde9df6ffd8d13f8ca80da300b7. 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/ESA012108254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdfb29213c1c218f13b4eba09a2453ab773418a59e8da5e5616082baf45cd88. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBB2342038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dca41235d9559a27b67dc22b3744dfac5f841ffe8daf41cf457a6862d09907. 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/BK4DA2207696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857093faaa2ffc60a2113f078e87a9271a4a11971579fb5ad4cf7804806899cd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BK4DA2207697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f2e8b03704af65ece4c3cfd451719272da1a3a48627613b134409548a14b08. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/BK4DA2207666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be0a399fa51ec6edfbbcabdd9847b66bcafd99088936d6d196fa8d5a1bb977d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BK4DA2207698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290e8ce100b29d051fbcd86d50a78b3e7533c627194a61d596457eb82f67d613. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BK4DA2207699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8463104eff582f2c9e5b6c09cf9e7eedd7bf4afdf8883f5abf4fdd00167f4cb. 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/QM4TW2253490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090324cc537f0a51cdd8c469ab04e1f2429a5fd2cf045a1a1c87931c3d82e1a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLS2122510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e552d68b95df538ca1a98785fce2b0a5a2ffb72791dffce5b5d02f37e52131. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZPLS2122509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524ae00e3ed618fa95cb488a0e8ba4f5037eeeeedc5decd777c53cbb878036df. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZPLS2122511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ecce467843c8e0e3e8e56635e9672db72072bd642a0142b3932994b4be23c6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZPLS2122512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9abdfeac5a50f76fe7d2a3120433293400a3ea511f09e5eba9fbad155f22a62. 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/QMDA62129348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0892880aefc11f6579c8728ea9dd1df530ef83247585e615a909cb349522bdc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P42390210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b4923e56de27af5fdd690c690cd31ef7072b682f597df08c7cfc7c1fa38c0a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA011714372.