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 0x0f69c621fb1f5eecda2f99e147f1ecebdc5ba4a6ef1c82a242ab57f5dd2a361d. 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/cf09b1fb-dfe1-46b6-b4a8-8d51a05f29af.json and https://artists.proofprofile.net/proofs/artist/cf09b1fb-dfe1-46b6-b4a8-8d51a05f29af.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 0x4a49c9c60f6fd0945428588efea61967e0b41df72235859bc0e509242642e1ca. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ85M1922878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfce6b54800e95befd5b6ef977ffe1fa9be50a4c7668e5c4520e926e7083ffbb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZ85M1928857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd68324dd0df3cea865381ffc1eed9f629582743c1bf00783dacbc6c28fc7e33. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:37:57Z), 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/QZ85M1928859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188557a874958a7b8f8af88eb38b26946cdda8a3e637f4157ebbd1fd2edd628d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZJG52048156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0779face12bc8ede4399f93a049468a80c8fb5f770ce5d69f48e5baabfb69fbd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ85M2026996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c5a41897a034dd95a4f054338273865e39691588be4aa529d446930d11fe51. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZMWW2070444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668df02d1558be7a8c83ed58910e81b5359c80bfa28464a681c293320b6e3bbb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNMX2132358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7474ec1e8ce8c568415c6b4a6ade043d9b685a72723f2b2ddf1bdca4789e34. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:46:42Z), 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/QZNMZ2247057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7964187795a56aa6a17065490c930787671f01f4eca23cb711bdbe237c83b0. 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/QZL382327485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a86041201a976a06c4504c6050f586e5b557976c21e7663ad6c0acd090cd61. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZNMT2397334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89189358979fe00157d239e2fb45fdd21b781009f589ad9409ad337e2206b56. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZNMY2383687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ec3b9cf85fb3813a841073bd09a5fec3f3c3a297b5bb238bd23086845eacad. 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/CA5KR2432513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0635c6b0a8fc6acf872c50870c556aca7e518cd83fe2b9e008511098b03f1. 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/QZTGW2400593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27dd31633c1ab5342987833a62c9e511f620e3003584a12655d0c293ec6888b. 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/QZTGW2400827.
Break Up Songs For The End Of The World: Part I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f23bc43303dd4a4a328591c4319f3096f3a2ec4349f57d8bd205a781639b87. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTGW2401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f417f62656189fcbba65c6cf31f912bfe85eed423705559bf2bcd891f9a7bfd. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTGW2400868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6481073fa47132c80c9aa8727feb3b791167a8eeacd667ec654a952b077d1. 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/QZTGW2400843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8408194fb945acde6d0ec256da43e6fec341aa7614217266abe89b2c29b1e3a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTGW2400877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f417f62656189fcbba65c6cf31f912bfe85eed423705559bf2bcd891f9a7bfd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTGW2400868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6481073fa47132c80c9aa8727feb3b791167a8eeacd667ec654a952b077d1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTGW2400843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4643793a3ed79e3ad0610c05ad91423a4d0d5bf538f71fdea90cc236c00abb15. 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/QZNJV2010126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb5a72e360195e4eb94a928741378e28342a599eaebf22750f6c152015b9316. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZHZ62136788.
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