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 0xb35e248c91beca9226905f5eef823c6866612d27c89cdc73a101c35e5af8c00b. 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/4e0f56d1-e018-4f7d-bcb5-107073330831.json and https://artists.proofprofile.net/proofs/artist/4e0f56d1-e018-4f7d-bcb5-107073330831.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 0xde34379142e09f0c57eac5257b7428f821e48334481c6d9d12f111e41fdb764b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAEU2016878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d22dc40fe409f383777481e6db3687efc25335f1bba7bbadbbc4a380ece4c5e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEO1998182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd67c41de3d0d869be5bd8a79a6b844f11013fa75239a9340dc4053e4a303df. 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/FR9W12122009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9a313b97122b92fa5eb0bd55f2340d31b78633b0a7785eeb038f2703e5ee36. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FR1A92102847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d164ff66686348332f386c14326397ecdd63e06860dced67c0ff2009c77ee1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR9W12122008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd67c41de3d0d869be5bd8a79a6b844f11013fa75239a9340dc4053e4a303df. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR9W12122009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a46280726190ffb9f845b366e9f3389d4166c5274c1319cead03482ae42cce. 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/FR9W12121825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e8e224d00132d5c57424cc6257d86330f124ac310afbb37da7b3e888fa54a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12122012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e1959de4ff909f9a131d6c526f0a882e24a04894f1689fbf6536ba513cb967. 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/FR9W12122013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4f7f6a6458a949f7c865aa5ece2cbe860bb74ae45bae2bb0fc7b54b796f547. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W12217741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857ea2bc87b599a0c927b82417ff99e2a20a80814aa72323966504c935f53535. 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/FR9W12233537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0493670521c9d92140bcffda6fc3f120fb9710a3251e2633651f70c919e5113d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR9W12305793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e84a228b9e4365e688e216a130673e828a9f14a6e1a7295e073b610fef6235. 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/FR9W12305767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40f5bc0e49c7bef6544bb0989fea82cc4e8586ef6e1dcc5bf31a38d7cbe0357. 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/FR9W12305768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ce9b9dff7917fdda0858933967b4e44885bfc30b90afbf8a3de54e4f05180d. 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/FR9W12343977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f8e364f4cb3af0003a8fe57fafdd34be58d1a9ace46b05db7f494fdde71f0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR9W12343985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0b960b9cd13c751ff975745514cbca60bd580336e993da9ed6460d12c17dd7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR9W12405682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa969d25497886cd5342867dedce68a5789a04874ca1a4179dc0980b27fd8d0f2. 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/FRPZ92418220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63af787fb687a400685f3c6c126492506b57b75b35dae68f0223949b2ef53dd5. 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/FRPZ92418230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a574ad44939f585e0fc8b2bbb01b830fb5e52554eed683deda7dfdbcd09335. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/FR9W12342953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a568bf3d4e580bea19359b1b08b65e02637278c3df4c9e8bea356ace8a844cf. 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/FR9W12343986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45885f2a6f69362fd9644e14f0da50c52918ac8821a1a4d3e68075ec35699bea. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR9W12343978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b45ae8043830335f2dc987bcc51668b958a6ae7ad0eba682a466aadc62dc6a. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FR9W12343982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ce9b9dff7917fdda0858933967b4e44885bfc30b90afbf8a3de54e4f05180d. 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/FR9W12343977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206d76de18180f076107874ed2c6406db9ed616be2c3d75a1243f3b28df1d8e8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR9W12343983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1578ead3e54d1540a850893eebeef2b775b0d65ee08d3260864c0ccc22bd7767. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR9W12343979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ac9becdf56e4606dc330073d898e437479dc8c8c1c2ed35c5d32be691cbad4. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/FRPZ92428090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ea387e8b80a734bc7eceb33558665710adc47a44d2c28cf45dfe6c7dc0ed75. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FRPZ92438250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ac9becdf56e4606dc330073d898e437479dc8c8c1c2ed35c5d32be691cbad4. 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/FRPZ92428090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d59d1be38b5b1b9cddc985237fc04ffb3d6f0b4d13a162a5013da00b6ce6f3a. 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/FRPZ92433090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68722271577496b900191a5bfecff04ad78359e94f8bb5150efc640b2017d2. 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/FRZ042400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e3d4a9ed253663b635ad64f605abb7bfab15f96e67a424ff14bc1f74e352b. 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/FRZ042400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68722271577496b900191a5bfecff04ad78359e94f8bb5150efc640b2017d2. 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/FRZ042400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05134af968d04a3a60b5ab5a68fc44b2b0dc969590d565939bb9d81232c59548. 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/FRIDO2416059.