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 0xfb8f0d5f5cc8476c7ffeda68d58709ff9e0a16c5b30a396f94de199ae52e6eb4. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afa0566d-1302-484a-917e-d0bdef6784be.json and https://artists.proofprofile.net/proofs/artist/afa0566d-1302-484a-917e-d0bdef6784be.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 0x43539d0ca70d3cdb05dbcdaaf10c1c90f566f86752699e9ea6da45a5c399a1e7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZTAS2355321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0c2069441d14e2859892d9c852d2589d30bfb4394e05c1cac9eb020b1f03f. 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/QZTAS2355322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb13f2c98992692e52779cbc74e8bfce6ac4896b14e99fa746d58c4b6628721. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTAS2355323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8dfa77e60c2dfe67dfc3bacb1b1eccef013bc4f86fcea75c6f21b288670c0c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTAS2355324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eac365937dced5670f667fb85c831f23da6b37b247f1ab8018c159aa220ba6d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTAS2355326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58158e3dc1d06a472a8e1ec0ddf7e8a40011de294703dd0e009635e54308ce24. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZTAS2355327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b7aca526b64114ce52190433555e04d6404b67adf5df6de7fc916c4944ff0f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZYFZ2410685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39963e7680a5528498f008d048654e9996fa86c92b50f2637fbbeb4d3dfa546. 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/QZYFZ2428466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0216da838223fc0fd43c43c6d2dbb0dd1d6acdf1ee69b484d8be833021d43f5. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZYFZ2428468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e7ce0228608d455091a306c89fd41c36cea69015f5d2a64432245c7dba3ee. 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/QZYFZ2428473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a2b028eb164d22e56af08d504e3a746a572bd9b880d341907d07369b9b12d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZYFZ2472066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b564e147a62cf1c28a12352f7520318d0845a8f7a550832254802fb09fa6283. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZUM72400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c35c2f400ec2fc10eca9072b31f3170a55b1f3fc59203d28368357c93919224. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZTBA2377695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b1e13e28e727db5daefdc3627873e40173d6572893cec448d5506d08380c10. 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/QZTB22373526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c59a719d6e14eefcabc0dd653fd936418b2c586258262ecdf760dd86f68677d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZMER2301819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164e7eb62f6bb628b9dc493284ce4a06760f78cd627e5bd31d3ca2a18cbc79cb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZFYZ2356400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee8a0282f7754e9827a18f30a2f4684fa3777e799a3d99a1b6827daa2fb61f5. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CZUM72301573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bac27ddec294a019367c9b6433b2e16109dfce30ca30f03a6a67e47bfc5a5c0. 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/QZNWS2375057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4037f750c1491bd216dbf20864029e1f400a82adc39c1a82c15202699931674. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWS2375058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ce77c756f9f90bcd8ada9aa45be3447e3c67b47f5e87be4c9f3e7b19972b19. 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/QZK6P2331793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e2a3094fd37eda349787490b0f58b661bf9b91a38764dc72347a4ce0f94d0e. 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/QZK6L2378635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa694f89d29c126ef80d09cab0d6e5c2a399b2f188a3ae8b24f21072b7d298476. 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/QZMEQ2364104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c1feacf72d4c02e618ad3fc63ae78d1276ac5adc2aa56431c03882654823e. 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/QZNWS2375064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb455f3a5c3a1c223da6af6055bdf617ef68ea3e3451711c8e3b13947cdb4b585. 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/QZNWT2328762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98af2f73684c7c7e215880139df53fa8e491e8af7e9af5282f6fa4ad382f8f6c. 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/QZNWS2375067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b76398eb73969719f7aaeb45a8d3dbf87a14207816c7cf8ba62de25324344f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNWS2375068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10fb87b29f94dfd1b08c47e6d5288f4ba9301fae85ba9d773873d67d402c56e. 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/QZNWW2375404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91dee392830c8ca97bb2f6eb452696b5ee78530fbbbeb57a7cdcaa845585ae6. 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/CZUM72400744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f97385006f6bb484b0d93298244ed04630594206928aa794c03d7c4ad6af57b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CZUM72400669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b564e147a62cf1c28a12352f7520318d0845a8f7a550832254802fb09fa6283. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CZUM72400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da465f3e97b4de8a8f2083bce84b6ef12835e2f51076504119d06f0937ca7f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CZUM72400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992fd6f929a1602dab9fedef53d26e02bd4a788532346c2124e5f8e032700e92. 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/CZUM72400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecbed023c68548bb85854ff4d457fcae06ab1614ca8954cd58c7be65d2fae12. 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/QZN882427114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89bfb1214f6a30728134d498c34f66e0f90f8f91db8e3db47a852b7fff5827a. 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/QZWDW2449640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f58499c5356bdf3ae305a5822d3f8afd4eaf54cfadc43a61f2ba433cc29892. 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/QZWFU2440334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e79acf1e85f230835ea246baca2d3929e6413da4c9d50029a283e5ced6a8b5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZWFU2440335.