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 0x36a2f9027456b17d0fa4fc0c068914c775325df250c3a3c65c79096c2208920f. 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/448de99d-981c-468a-9fc2-d3fd3863b38a.json and https://artists.proofprofile.net/proofs/artist/448de99d-981c-468a-9fc2-d3fd3863b38a.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 0x15104bf6e7c1fe4c18462c9759a1d016e3fae96d2b9d8282f010f1c75240ecbf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA082341146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2a6d2a76f5d0c5585f4b3c803e84ff9685dc3a472b49ab93306fcbad3dcac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA072200911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dcc5c8553ae5843abf1b28773d6d5195952bd177a3a44f0afe4a0effb83fee. 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/FRX202246923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32291c96b97bdecaaa75f07c6bbc04a8db7b12eae39bf7782904a50c340e3e7d. 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/TCAFT2149608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6f0f4ae3aad418ebca1721ac6340aca017ca54a323540422bd2bf281c1cd42. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNN22177086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4626bc3916bace6abf90897ed3003097cf707073897cf358801af81c5ab66d9. 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/TCAFG2047532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b50e0271cf85d117d9888e76b9012e2ae93f9977812539e5733bd1a67dc80d. 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/TCAFF2054142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c50460cedfae95c1f8a91103ff95b28a4bb1e4604a401574ceeae6409007ad9. 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/TCAEW2048509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14483b651ddb1535c736c677cf1c495bb31dd12d81562ae828cf0e55abf0d8e6. 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/TCAEU2044423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f525583c2947b30e04dba2c3bde14b29a67abc2bfb29042e5680f30e75e5f10. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CA5KR1962714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792e6a6f1f2ee1d73df0ce516f7327a057ff7914705e1b3a3eb31cd294128a87. 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/TCAEL1945105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc950e9b0852885ecd21af3229026f939b33e3c6ec4690206257d1aa43603cdb3. 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/TCAEK1903078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa742a31af7276c6cf9b125a48996b06f670d232e89ac71de2f5870c898a1c9ed. 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/TCAEE1968709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b425ef3334425a3666ce698eca7f8fb8bee1237909f95c540c2193e7a03a2d. 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/TCAEE1901668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d0ef49c074bd2899e955f64610c3bc3a24b087c90be81eb83e156b361741a. 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/TCAEC1902884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6bc637ed6514dbfab194ca277e9d1455fa19bc60217f019615edef96ab6cb1. 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/TCADZ1840437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0010300d1dd65bb4b04eb5e3ff9f609c33e862376684481bf243bd9a615720a3. 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/TCADW1839960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7753c9725fe616c62fdcce222d0e6ef64b530a1d845ce8f95513b577bfd85f10. 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/TCADW1839996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895909ef7862759b010496cf027462666bcd7c3db0ce361dfe2b74baa355b944. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCADW1839999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da7561dd9dac7319170f09caa822fc65c0b8de31f8564cc9d8482522589bc5e. 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/TCADW1840000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3447db2b93aa1c27970f6b8306a6f280245e0ec047d2d23f699ea93acd127b75. 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/TCADW1840004.
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 0x018bce86b2c9f9a82af60740ef744d21441abd2dd86aa51ab9f799c18b8e8047. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:01:59Z), 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/TCADR1823583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af73bc6eb568b7abe334cd95a3b674cdb103e1a30b4fbbb00dd27ac52ff0b3f. 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/TCADN1847308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4532b4e3e424dd80439a414abb9de15cf43800aa6a4a0bbbf22c73caeada1866. 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/TCADJ1784846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0f581af480b62fc548a75a81c0b5b8ba37583183ce7b88bf5eeb3c23edc96f. 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/TCADH1725700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a90411135c693bcd6f02fc8527c8a761095cfc306f8e02ca536d55e60fc9d9. 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/TCADG1759735.