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 0xb4c3b70e820cdea818448d93c7d752ecd542d201de05d03a2df492074b04f403. 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/89247ff1-39ba-4800-879e-f7631c256941.json and https://artists.proofprofile.net/proofs/artist/89247ff1-39ba-4800-879e-f7631c256941.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 0xd0fb97d6fe30b228e49659f08322648284e7bead8f706cb84fb4c73854a48d76. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USETB0812368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a224b341fc7d8e9768c04cac27dc4fcafbfbcc3d6fa91790529fa21d614ac4. 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/USETB0812372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0aeeb6c7f61f04acf2e624e1f81de69f57670707c74b383dab14802071961. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/USETB0812376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcb11bffeee090bf9df437103fc20119f636c74df6ba825a938394869fc9706. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USETB0812377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe5b4834d89fde00363a74813f00ec848c9a535866eefb5650bf8a183ffedcb. 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/USETB0812359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170031df24f70821efad5d017bedca72d66daa0611b624d4e1589a4233e6e20b. 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/USETB0812361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efa00a7de99ef04c3c95e3ff14f9ed9dc3c81625d9f950df5369cbfd43382eb. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USETB0812363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6967a0666f3e6b495337c4d96d32660a8216c2dee7d8b74dcd0d6fd6d6395ae7. 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/USETB0812364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fedb6c6a9e01cecd20db7393d2fcad9212b6bdc1ab9565e1430f230924ac33. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USETB0812366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d62661d673957e88e62f6d107f6c91f0cf7c3c78ee37981d9afdb0b33ecbf. 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/USETB0812383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad24919a1154651f8391e5333a1228aaa52d272509f9fb6a09c993f9bad9c44. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USETB0812385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f61bfb6872ae87f7f9c94897269ec74254f2b5cf2b20251f2bf0115a8b154c. 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/USETB0812387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e0b0176ef012556003e576acc433dfe6a98af77c8dbfbc53185e9aa69d9ee3. 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/USETB2100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26a5397ca05442e795adc35a266398fdfc05332b71b60510e61e6240d3a90b5. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USETB2100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1389d9778d2b9694e2bb4e26420af1998c41cd45c7cfc19f8c358f8cf28fc341. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USETB2100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cc0720a4a1af0930933d65b1823138e447a54511b4e2d561f8171781c8a1d0. 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/USETB2100200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc64b6ba92bed4f7723f1328039015b20f81dbfa59aac37208b1d289180b3361. 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/USETB2100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70b4a7de56852c6f13c6346f296ed7327c8828130f94845faebd2f13d034579. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USETB2100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a6e90aaf0b18c2dfffd5a217f5cad99960c7692210fd03df39e3a09b1826ba. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USETB2100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba8f914c3b055ae3f33f3748a0825deeab3e70f264667da6afea1e76927777. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USETB2100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a6e90aaf0b18c2dfffd5a217f5cad99960c7692210fd03df39e3a09b1826ba. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USETB2100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65da395a50b57141c19d547bbeb2a44841680e6b032321d5a3fb5b5c184621a. 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/USETB2100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987915027628e577f62581cc016974b6d303a3d7465d59fc7f8b8ab71a5b35f9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USETB2100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144c8fd997568e9023437e782dcb1f71ffaeb22f3655dfbc2211050202edd21d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USETB2100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de4097793045f1393753d10411c032c2b897e246ff8db7fff519479a5251d74. 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/USETB2100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff37aa8f1d3b10f48c39c0bfc847f0ce2bda38732492c4d31a459a2490305f4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USETB2100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27664c532c6559b2cc15580d6f05dcec4ff4b5ec368cb8694912ffedc925edd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USETB2100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7b22a4c1abacfe15bfa6c325d77bb8812473e55a66e1d0d58f2b854425d21c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USETB2100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f47277d5a8ac27d14c87872b56f657ffade86dd0456f197317989cc637409f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USETB2100287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66368d4240ea9c24bda9172b2f4b518867acecdd1b5fdecfe26281fe1afe2a9c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USETB2100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7439089830caa44a68232a297410850a93f0217a69ec3b224238a9464359fd. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USETB2100289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dc6b4ff5609e3bf666512c9edcdc51aaffaa2b4949299f8ace173f6abd356b. 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/USETB2100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67467fc894586dedd46d1d0091871ae71d1b8a20ee481e791a5d9fe16b7f687b. 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/USETB2100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543f4c195ad1a3431217d5261de31154245683baf1620c9abd0afae3265d180c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USETB2100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744a4fdffb74800f4ec0c9ce365c3231beabaff8f92319c67a6c73b41b0e2d37. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USETB2100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b34be8754df31d9ec7f8a84d4361e0db451a1d0c67e7ba52fdf965e865ed03. 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/USETB2100186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0028e5a284258262a545be19a6c0658701e5678f4398ec13ce7862debcb0c6c2. 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/USETB2100313.