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 0xe430d18fefb096c818c81558e83b8a539ac0ed6ab55c1ca34d10b6b1c82b1e51. 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/9e711e33-a1d7-443e-8ab0-025ceae1264b.json and https://artists.proofprofile.net/proofs/artist/9e711e33-a1d7-443e-8ab0-025ceae1264b.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 0xb07baf16465127c7c5239ece7be2262f44a84de3d46054222f2435933bb16e67. 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/FRDX62404650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8540698d76a163f7061e70b74f51bb7a9f57e29981614b8e5026eda799e498. 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/US83Z2479614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78060ebd0a763d4cc941f82a7e92606398c4e1a3fd558a56ea995a69d0b677d2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:07:46Z), 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/US83Z2479615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e0c3f540ccb71115793556ad09198c79a934884e68fc1d5bd2aa1d46fe9ee9. 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/NLCK42340636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05d80f446b358a908d17ad4faf1ff98a2037858666100ca8c1c4be51bda37ac. 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/NLCK42340635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e9251c9f928886ac84ec6c0ba3bf403095027f47fd385c49a2e8ca6ce135f. 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/FRDX62310010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a439118125752d7204e46bedf99d9a0ca5535d6517d3c5d44d07f9e03218da. 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/FRDX62310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcac2179625881103622901f0a9ac13f04ce3516b3f54b3eeebc1ce6dac7ad7. 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/FRDX62310040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5647db785298f610fc10e5fa6efb9b6becc655669bcc929046d8c8ba392bce. 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/FRDX62310050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcf89ec95c0d6a1696938eb95d50e3dada8bb19468a36c3f63ca2864bf288ed. 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/US83Z2336834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efcb2582f7d5e24edb45586f927e62587903b83d30d30715228d689d16fb79a. 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/US83Z2336835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f7b3e901bf8f77c44589d9c3dd7893cba7234af2931c15334f5615c426507. 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/US83Z2336836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f966b6ce5968526416d1a9d7f9756fb41df7b2bab6417028ee11d41909f171f. 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/DEH742314717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24622868d668e7064dad4f86a238b556265f38f04e6028a805bf9f780c03f8a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US83Z2320056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf986b109a680b7f6606b2a59577a1e2dda33e737050f446046521945808c1a41. 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/US83Z2320057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa4464ad79b09948d4197426980a2a7d802fa2bb24bee711d6d2e5ee033eb52. 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/US83Z2320058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4609d648d485c5d801997ae0df8389212196e000c57fdf322856fe2caa250360. 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/US83Z2239260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b567cf3b3aa2205213615ce41c9915aac08564e427e5af6fdb293d5a0f667f. 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/NLCK42221613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbac93baa43e1af9a08029cc3b7fce6b11031f1723ac002e48427ec1fcedbc9c. 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/GX53U2069073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3876263003fe6d5f99ba61922746a8f7d3a95121a0eb1ccc3be9415fdb6152. 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/US83Z2143222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1cb09594ae2d3058f0873f6dcc224658d892c0818ccc5ff2c730e5c4568be9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62105369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e25fb8192ae2ec39dc0a57932b14d58fa710492ad79fd83931a9a9bb9239c. 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/GBLV62105371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f98f956407713000384714fef9db0aa8993e6b6072ee3027cce2bc9d1b3cc1a. 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/GBLV62105372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712687e73be432e4bf8008600a807ab469a6b7d33ece52bf5d370236c57d813d. 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/CH6542151996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a298f9ca49c4cc2461b529f17d67f1bd53fab934b8f95c8c76313af989ed32e. 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/GBKQU2168862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102901062d793c5b529d51d4a2a1fb763c3ed3a753b4419979eb6969c8bbc552. 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/GX3Q92069747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a6d56d2baf07a06db4a781c8b5c5e52aa3e8ce3094d1cc67d2153a988ae5e3. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:41:20Z), 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/NLCK41086825.