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 0x602cf59561609841bf990d35cb2bceb440d9087f7e401ec2bd597b4a0ee72e8c. 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/6afedcfa-59e0-4027-9add-de23dfbf6357.json and https://artists.proofprofile.net/proofs/artist/6afedcfa-59e0-4027-9add-de23dfbf6357.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 0x5691475c95a9dce569d39be2b11424d898c8356525ecd26160dafd7e858c66af. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEZ651214520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596c8c6091609de150fe17a2876aad3babf7071737ecf865868dfd7c19715155. 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/DEZ651332509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00bc1f19f55df765a7bd285deb255993a80902e09a96489417c09f87041c3d8. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DEZ651332512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9626766097e66686b90cff062e8ddb429f15ce8d9e7b4c6c09bb064d5ab874. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEZ651332514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b749c31097a7a5de64483b8c515d83995e9c05f1ce20e24d3ae60d1e192e102. 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/DEZ651332515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7548808788e157bb3d63496f9cd676b16bd9b919c7cab68c00c2aa94ef258c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZ651332517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af58d46a07ced761826284169430289bc73c6af5754c34a456023bebc6ccb77. 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/DEAK81600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2ce41b385a1f61347bf2a0a9eef779dceaf7f36235f2f81fd8abbc511ea58e. 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/DEAK81600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623da0057591de4ae0dc915244cf107e8c490b8d87eea2189e6a2e665729cfc2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEAK81600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265d934e623115f1968961f26faff2cce25f781d7b44ce35d8c1aa772185ce85. 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/DEAK81600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe088783e8f354c8f2ca7320fa090ee6387c8d25eee7001d996a90e905fe373be. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEAK81600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b03fd5ed4c82a2793c74feb1411c4c3c78d2dfd934669849621b65bf000f52. 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/DEAK81600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433900e0d65491fd9b3eadf65b2e55b1fceb80addf20a131cf5982583238132a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEAK81600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beeec6edb4b24dc47d9a28cd30231ac88dd046e243879a8138c7114910cdda7. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/DEAK81600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f0272afad2ba99c518469803193a118c341727bd391644f917b13474ecdbb. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEAK81600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e712fe522010b4e16b8e7f952d31227c2274222bbdb8dada9ec2437225c875. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEAK81700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde74531b0f9352746f8196d5cdb154c12135c8518e48c003fc76a42f62d697a0. 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/DEAK81700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc69b90e65c0c8c541f5f2c097c474981d027fd509bd36fe286314d468da792. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEAK81700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774b18ea6e664266936ff5cd0f6df5886279d319e9392346856aca6f9867067. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEAK81700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd310f2ecbef765a7fff8b0bb14f82bbbba658716696d69dfa3f96ec6722a07bc. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEAK81700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501553763d692b71eba1a539f0b2234233822a25f42398c68ef1b7f0c40a7df2. 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/DEAK81700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a059f8d1de489f97c888642b017b75d5d0cb3169b0a149fd5c41759f4c6ea61. 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/DEAK81700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ce115abd6fca981a4c8360aee610116de79c19dca1383c937ea2f67979273e. 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/DEAK81700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6af211250989089abf5d6e82b0ac5887173252ea7b7502338eafc541398608. 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/DEAK81700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30a3e709b5aeb0f52cad407464d0077ebabf2cf0a57cf862017fff41cff31e3. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/DEAK82000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0037bed00ed77454e35b4aa60a1b8fc6aab7343607dc838e8049255b76f29f96. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEAK82000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3e041de730088dba2b51240e52e98b957ac8025d26abaa871c395f33c9f918. 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/DEAK82000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ea790a90e0e92b2a1ff84c14a1cc45daeba230e548337a80ffb5374e24c84b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/DEAK82000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14699363a496cb012c4717d82948a1f43e16130cece571f8a9a18e25e6122676. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEAK82000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d65a5e6c7433db48f9fea3a183242b5118f9a65ffc1e2f89d11e9dcfcf6736. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEAK82000016.
Kaputtmacher Session Compilation, Vol. 1 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3de7e282401987750a6dd8d8409b0c8e0e2aab6159172e5367de83fcfcb4768. 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/FR10S1734687.