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 0xffe5cd6687f5508b21790bd9904dd50837b39ed136952978b9e9112e57a2af06. 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/6ca63e63-1b16-4be8-9305-077399575e05.json and https://artists.proofprofile.net/proofs/artist/6ca63e63-1b16-4be8-9305-077399575e05.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 0x142a42cd72f8c4bff67c7cb417e57dade8b9da50fe48d1f6571917209f79174c. 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/TCACM1642773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dceff6f07c929c055c952b35dd610246d6dfabd32388ec69163573c1962a5b. 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/TCACM1642774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973367a7c591a7fc9d06a7a9b5e5167f72e7f1fb8fc6b9a117ee4255e60461db. 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/TCACM1642777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d01c3069979c54096e1163d374f57e545980bcb9d88680e88cbf24c9f9ad278. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:24:20Z), 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/TCACM1642779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3f9a1ab9e6ede911a58f82b2164210e2b3fa2bc0176aae4d340ca0700a8450. 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/TCACM1642782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cca393e6a6262eac47e5e73c02a624fcc761fadeeb33e9acf684e320ddd202. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:28Z), 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/TCACP1617032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaddd3cd74b8ea4612f7a624517ce11450c34d61eba358aa13c4676c89d0953. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:01:30Z), 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/TCACP1617035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742038b9af3b9b2918e437b120eb9a3feb30c5d2edaaed69ac2acfc832cfa707. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCACP1617049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef438b507cf1580334e684f9f4e8732d4be94fa4c46b52073773f8f732c7c89. 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/TCADF1755218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc1dabb460e23b7a72828843316b73f1aca6b4bf4c1cec8a42da9bd60c3b0a. 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/TCADF1755220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdd83bb8f03eb62887f354c63980abb050f59a2e71f31971326217f47c94ace. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USYAH1700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246a9a892d8318f199ebff65e3974e8b949dcf70f07e6c495fff01303b25ed2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCADF1755227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124dc7bb23ea4bb2cb1eb36b7e5caf625f8fc0d6f695d0dbd1a61f15d7d9941c. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/TCAEI1936430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7a76e16372f665b02adcacb491a1094197b2726ad93601b8dbe45cde6d0a6f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAEG1934983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6555db1886a105399dbfd1b2b4e39da34c211172eb5bccb8e407965ad5ee61a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:12Z), 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/TCAEI1936441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13546eaafabccac4b4b3b20ae8fcb453f05fb29c429cc7b7a864542977506f0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:49Z), 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/TCAEI1936443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef50ad1cd6148b1345e36ed351e56074ff1d4c21cfcc95f1f0dca4e7eaf8b37. 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/TCAEC1969070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7defd78cbb6cfaa15df8984bc13ea2ccd8235e1bed7349c46541f84597a237d7. 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/TCAFH2045920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92950917f54dbd71a1e7e9b9de75d0c81a5ffa8115a87df152741b25809c39b1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAFB2028632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcc85ba68d81aab4c4e52de8a91fb077f7fbc2616792deb54a2701f77064e54. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:04:41Z), 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/TCAFH2045933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42efa739ddfbcad35c7b027cdf89bef2d3db72ced1f485f54d11d6db6921089f. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/TCAFQ2114111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe019dcf1d87090e08c3797502ee1a374d737b0df19c2186af4ccd2e3bef56098. 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/TCAGJ2275213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ad162ead710504ac66d44635a55650e4a99caa2478b2cd6b859a256c69c2a. 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/TCAGN2202021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb718b9f5d118cdc7180734c2dbde040f49f4255550d6eded1210ca90287e36aa. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAGN2202023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f5743693166ffdc27465279ab50e4b9d551e3f7a60e8c154b174300713c529. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCAGL2269021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecb906bc1ebcdbf93824c1546f17cbb4d39d297671cb2c1a86c7d1f67a99295. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAGN2202033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd4bc694a09f8d8354d64a6079fa4808c44c5f2c42534e0276c1e2ea705089. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAGA2251432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4797be07f506200cdd7c4b33f8f173606662919f43d60966157780fb7d14238c. 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/TCAGN2202041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c559140e39655a48cdbce4fecf0b728bedca2b48bb4baffb74121efaa46d3c. 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/TCAGN2202042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0587cb6ccae4ff319eff8ffb6ea47749384fef821dc467a3ade925f0e4e6378b. 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/TCAGN2202046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83230acbee37fe7d637859263abffba31776dc4f91dc2a16f817b08e97054bd6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:40Z), 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/TCAHK2357147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3099a41645269f7888941254628da4e76de97d718af70ad60625e8150cda3f48. 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/TCAJO2560976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa567f3d7d76884faf8a4ba91e5374a8d69190c7c9d93c31546e6e43843679b17. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAJP2570695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd806b32040a6df7d4e9c1aeb3cadcd9f26c7172b9a2de300ab17f65f72b09ec6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJP2570706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cdba08e0e02b3c623d5afafc055eee10007da15c6e043376529d537c314abe. 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/TCAJP2570714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db51bf40a513641f635738036408ab91742956a5a4a18073e60ff107163ae5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USZ4V2200082.