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 0x00348ebba73d58027e70db3544dc3127c306fea55cd95db5fae79e17abe52750. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b57d3c42-a7fb-4bbf-a2ce-97b04150c336.json and https://artists.proofprofile.net/proofs/artist/b57d3c42-a7fb-4bbf-a2ce-97b04150c336.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 0xd3bf8728adfa121ca83d4fe6a03e27483125e14f61be06f8c6237a73ebcf25e1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USANG2131849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d30a8b1699369880fbcc2b49b7b798cd33cd1daa706b8a3b5ab328d67884c2. 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/USANG2152334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b12859dfbdaf1c82ddc94ce1d6071377433c6224952303e30092b1128994a0d. 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/USANG2149680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406ad4d639894d9931e0e4fd89cca306b8f0f010c0a1398cfe339c2c716696db. 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/USANG2149682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd071e2ddfd699519ba76291ac356e098ddb2ce3c469c3757e35c497ce7b5fa6d. 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/USANG2151027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3460c33d92fefef64c52b1db76f504355a73fc4541aa96342d0a61f9ad5faac. 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/USANG2152317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe602c8f84b64c5daf5019d2ac6a46e46f8a083fd9eac1f298486c529edcf5aa5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USANG2152332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b374b49f45cda58fa74419a58ac23bba1ff9de49c3bbf38d81ca71e96908d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USANG2286745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8aee2b006888b41c93aa770f5bc8f7d5ba642bc37001f9a0f00f313700174d. 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/USANG2286695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408fc4f08f264d8c76f44a45cf9b4c3410382b11dab858f133a159fc17930019. 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/USANG2286667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f81c3d08e804ef5501338b3a2c1650e691ea79e2112f4bd4fb0a0c66f499d2e. 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/USANG2286759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1258bcd13f8571c2c29c16d8f97ff13dff57d313fb32480bb6ede65c42d09fcb. 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/USANG2234761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d79b3e0144acede8395c51d86d00c3e4fb3f17b298b449268d97fe159be1ce. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWY2094105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf0b09858b5b18594f5c0ac5be4f5230b0bb50bc05e8051bbd36328ec11bed. 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/QZHN72044589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6e3e4445e7dd39e6b84ce533c33c83a245e3dcb8e2b230d029c98037ae5f83. 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/USANG2234760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4defd6be44b923a433c462ba44fbee3177307b25ad187baae29747a616d7b8e7. 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/USANG2234802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655ebe20d5a8a72eadbc1f3a9561d43e2a369e8879ecd2460969776acd05ac0a. 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/USANG2234797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aeb2e1f72ced9c13e3738f75e2a92e9e73d67503a23f7220d553c1b476306f. 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/QMANG2233613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791764d6120f41868de80d3d08ae705a011b6b775490b2cd7639425e0483e490. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMANG2233625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb567c8b9e8f1f3bfb158e10d2c87cceac0b03279606cd3036289575e28848c4. 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/QMANG2233723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ea0f64369dac4d70cd4be467d149899bbde606e761c2f28559a30a207a70dc. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMANG2233800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d4ee6c2d611e050daa730e008806162ca6dafd020d7057c2e6e744735d75e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMANG2233842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe059cc151d0e222a5e44ce3c0fce3f0c1fc8673330c31659179bb6a8479d468. 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/USANG2267194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b705ce3a741f255880de1e0cdbb7b78703c02b7e491ebd0f6b518ec1173057a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USANG2267218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402b5ae032a463f04fcad02ae1756bda8532ae9f56d6214c25a78d585d0df216. 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/USANG2267234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cfebfaa5afd6e09af8369d3a58e9b8ff77e8fea2569fe402e5588834b55cf9. 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/USANG2267235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f09524b93b63382cdfe12d08112cb1c7538b84b8f13f875003f47ac1fefbfd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USANG2267238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c416ac78b22169b7ad2b7a6b9f246c32bbcc1616c9e560f96f906fc65b5fd1b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CALRS1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93e7255468053ace6b5074e23d71073653d20ea597cafa044641e9b99fa2e46. 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/CALRS1900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a938156ba5c8af588fb95a0436ab385deac71b28481638134a9e2016bd5cd0. 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/USANG2291891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16460234dcc1a957f62e33298b1518343a79486b1a68e9107a42232457639e96. 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/USANG2292060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b75acd9bce99f7a07ddf44a0bedce9f8526c570a3d0d9b50993a1993cce9603. 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/BRHUM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73141bf7ef652b34e6d319f7c801bc8183c275549bd0d239421612adc72da73. 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/USANG2292438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864200d7053af550670d490387f630b4436e9a3e5d7fee18a91b20309765e4c1. 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/QM3DF2266501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f823186af456253baefe752f72046667108f281a5c5d621e5b0c835a6549f1f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM3DF2266506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e351be86d5a735725c2d9570413c4cd287c8a4c5134bf6327628e09e7fee83. 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/QM3DF2266515.