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 0xf14b3a514d36910604bd282432b29743c1a7ccab0ba4a93add34cef46dfcdb8c. 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/f3e8b576-6bce-487c-80c8-513790056d91.json and https://artists.proofprofile.net/proofs/artist/f3e8b576-6bce-487c-80c8-513790056d91.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 0xe6f7f14631f2904a07349ba6776d10e8ac28054de37b78c2098571cc30a33e97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYA139800197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb32bf21dd033b79d77812fb303bc6f64563ed4699ac08a149786123e1bbccb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYA139800198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55b838a6791a0de9dc526645108f1bfa2c354732de38b5e0cfe102b0c4638af. 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/UYA139800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6ca662a2602f88154a1be15ef76d11bae81d69a8536e1c92fcfb9e528155f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UYA139800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dbc6f30ae89c7177b7e937ed1b6b90411fb4786d453e1e8194a0240db209b0. 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/UYA139800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1d7541cdea2df8ef3439e924b8934e3645c0896a6317f0210e2f834db64357. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYA139800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c04e28bc18b6fc387c55f38c83e5d2d67db2b919e273e326664fa5a5929a22c. 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/UYA139800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d09edea90095d880eb1c6f02b9297c90fdbfcc1e81b016c7795ed8db7d753e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/UYA139800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9fafa9054d4fc4497138fb97f43b947597074e144fd1b9a09b01e4b013f203. 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/UYA139800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8494a82ebd32530ed33fbd0dff0b1d84518bb12303ad16e496ece6911cdcb8ac. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/UYA139800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad680a8b4de8ec3993f2623b314169a4ccd4921a67496a5132500dbe0aa9088. 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/UYA139800200.
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 0x1881600cdbf0b583c1f4712b1735881b268b59a47da840b2f6d9b52cc1679971. 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/UYA139800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e560f4d7380de725708434c8d3df144eaca48eb16c7f7464a13d5fe8f36c9d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UYA139800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038967476f66b33c1d0cf7f0091e4f2ee727501ada7194af192fe270dff73111. 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/UYA139800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cae7f27461aa980280e4e90fe24a34d6a0b475475491758040691602fcd015. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UYA139800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfae22b74c67e2fc8bd8413ef9c58fa151039b68bfea4d49e5d2700f24a2d74a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UYA139800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f091b29e7b8ae7fcd6287e153b71d2390ccf7f725377a01af0db3cd7470a895. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/UYA139800214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336962d08d283fa32146b8480daca1ec772218d91f47fcf25e32748f4c8a698b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:24:22Z), 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/UYA130100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269c7fc9f9d9752ff803a9d72bdd065dc1ddd19db9547f1404905a28b829b940. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:54Z), 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/UYA130100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5ebc8831f0d5179323adf9a9cb2bf5aa334dcf3ee052a090cccc5d7451c261. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UYA130100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e437c811f59aa8ad304ada105d530b9fd1fd44ee46d2f90e8c72e1e9f5221. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/UYA130500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863f5f3f74b3bfb013d54920d8f5176a0d5440c18fa773296147f1a3e1492d60. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ARC572002840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7676f16ded68157b860cfd82d91c59ce38a95bb06beefd9e21235c7c4754f358. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARC572002841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669f383a19d80f828d2a9f6ddd53d3462e132b7c14d00b4bf42033581829c519. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:47:17Z), 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/ARC572002844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdce83f5ffbe37e8b79a17569dea8659901b96be125bbcf0745c454c76a47c9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ARC572002845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe5ae43b1ff7e8c9c4d5dcf0ba1693da03f0c494cbbdf79e5747528dccd9805. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ARC572002849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d39ae7e945a33851616455c3badf50377959178e36b6b7e0f1d351eb2350fd7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:57Z), 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/ARC572002852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e16582e2f2533d93de774c387ebb882e7232ce55aa1cc83b29f699bf76e46. 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/ARC572002856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf258a84124e1897be3e7a79fc9b3ce3e71b37974c9b4f859f4fc5b1fabc4769b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ARC572002863.