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 0x3a8f9c47d621236419006dfebe86e78a23cea2d84a02a424cce67115c21875b0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea9fbcb9-813e-4324-a9d6-b574367262a8.json and https://artists.proofprofile.net/proofs/artist/ea9fbcb9-813e-4324-a9d6-b574367262a8.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 0x8fe27b474670528c8165c0af212e4fcb25fa42b7317393e82cedf16451599b2f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b3e5fd85c9e229bba8b27cceebebbed07f7a99ef44693a486b4ad1070b15b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd981e53d9f11b600526aad4cfaa7d4ef6b3dd8241cf617841ab5589cbec53e36. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRSC41500187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967e95e7715c5c11477268919ce0a500f2f5e0a2665823eb6341fa1172c4874c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe324dd2d877f19ac1d786bc51ece491b80df3d8ee2f703fd8a45c96abbfdcf3e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa051576c771bc7a559825ded823eacbe578f23a3fdc8a1b28b7582b470cc375a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83ef2e026668939e62ab07bb814f54904cbfedbcee621c845f9f777bd996a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2387fee39d4b6f741bec21b235458c0e7a35b2d1d2718a1b0ec5acbb8714e6b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1eccc3db57f392dbea63a68c4979a9484edd93aac739ce7cca753fb3ac3240. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRSC41500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3db7d5b6f87eef13ebcd5ff3d8d7e117064747b8f1af8e3c9e06269352d94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faa027e37f927db4cd5f76fe327584e3fa4b60622ade1c0431ccdbf75ff2a79. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSC41500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ab082de8055194fc2a50049570948fca1eaaf6897754598e2aaaaac4252f9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRSC41500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a29c9baf3cf76602cf2204d176866c6968c770a4b10c1d105d87750c021f99d. 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/BRSC41500197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f80c122ab21d68673f4ccad6b8dd4fc455557f8e17413ca32a780ba8c0157c. 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/QZNJV2513486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb28a848fec3476391f6d486c46c489213be9236ec17d9f63a32571c617f76f. 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/BXLGK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433fb39a17ac90c67c730b44317fad66627512e9e0d5302efb970d67e004693e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BXLGK2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385c34169d1c645d17fee39fd1af5f1b1c55ebfe1cd79b4195797446e08cda18. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BXLGK2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d062f1132955414c0dee32d368e1e9fc90c6f4b42f6974f096a31ae7b4e21. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXLGK2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5f4184c2d9001b96b8578a763ed93e11ada5016d724d5650c64771b12dbea2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXLGK2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab88d88c3797bc63f57101f6ec31b383374c25c3d7273b8f2236d26d5fd34dc. 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/BXLGK2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6867f8345ccc5324ae3d0467d4c5fb9c3077d28e69e4f0c5e30d44876e4251. 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/BXLGK2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1f766b1f2322d53a51d4bc590bb0fa64ab6047c2c43b5d28f230c8de7a390. 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/BXLGK2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2c9968352aaab93ff5ced535fc3bfc945eb08a887007ff569f61d492f9d5bb. 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/BXLGK2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30e230cfbe75a8a71fd9c6f1b82b42308dc8e2fe25528a59a569907fc0eb9a7. 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/BRZDN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587fcce4d39d6c5672d094193fb8feafee0d4edc34231d3f276d43161690c4b1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRZDN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc832a94fb89ab1ec59577820a1c23b788a810622bd6c43a34bad2a19a8b9acb7. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRZDN2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179dad76f0299ec4c7fb9bcc446797c8c2f61374e2866514c9a2b59f07a43e2a. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BRZDN2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66160f431ee572444e7bb350046235058941a72b1dc346807e1d76b8c4a2c47d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRZDN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1330e541e0c5e050f634f41de74e5622b3e5bb163648cddef96e237d76dd1e3c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BRZDN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb72b7d930950b389af3149722f7413773a6386bae3d3757b4898a50de7523. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRZDN2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3ab97cd3b196d70c6e9dddf63a3e3c9096f277a66eb5b008996fe0ca0168cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRZDN2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb28a848fec3476391f6d486c46c489213be9236ec17d9f63a32571c617f76f. 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/BXLGK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0762348a9c7283df59aeea9691fe4342ea9f4dd64bfd4d8b2e78d7661e8f74de. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRADC1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb13986a1a6d4358aeef089117f7eedfd5b8e38130a6af5f84dfeb0ada3999e0. 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/BRADC1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d062f1132955414c0dee32d368e1e9fc90c6f4b42f6974f096a31ae7b4e21. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXLGK2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385c34169d1c645d17fee39fd1af5f1b1c55ebfe1cd79b4195797446e08cda18. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXLGK2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe142cfa5187c3a0aa0767e4e2c54588b3f5131e7fe6ec810245f2106c54310a9. 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/BRPCT2400015.