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 0xc08e23de6c3f7f675170a8d9a52ee29a2857bae0e34958eed9ad3a618cb407e8. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f45c22f-db63-4ee1-adcf-991818466093.json and https://artists.proofprofile.net/proofs/artist/6f45c22f-db63-4ee1-adcf-991818466093.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 0xfd126b62a102ed7ebd412cab0d80dc11cabdee96069f826df928d41ace5faeac. 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/NLT2H2200495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a68aafc73c8404f71da18b454252a9df52ca3a0aba7bb11d81daccc54c0885. 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/NLT2H2200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84715d85b9385638ca1a83784cc9fe5b1d304384ce6d75e1d4ceff51aa95c39. 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/NLT2H2200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e7c6c3b49d9238a10889a73d9d065eb0db8aeb67786ea3366e994ca0925478. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH7812105856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d4f221ce47859d2a202731a0044a5e3ce49e1a2ed6552ea35e050d88daef05. 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/NLT2H2100467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b3c9d0010171e3228fb5cbd25529755c23dac758ab87ad64bafdfc13ff5f12. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NL1ZN2001122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3022a731c60737543f8b9b3aae91ab1c3741408d40242bb623c5cb3a9c5ff7. 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/NLT2H2100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242a1e7e168c39e98354611b05a0881f3b710a2c1ccf2f12275b886b4d0ba7e4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLT2H2100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc849fb8930d29fc6bdc64aeb2c0d4ab13146e2de06b48c9ea7131a4deee2179. 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/UKV7M2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0b5fe0f6990dab195bd6edc0fc156ef2ceee467f602a2c3995ec560f95f7f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKV7M2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fa4526dbf87d925afc387f853ed80abf61f103aa99eb07150be0424c6d963f. 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/NLT2H2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b46c7737ffb40e852f04b6a97a4d19cce8789aa62e3045b5a04bae53c9c595. 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/CAUM82300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebb57da6ee286b9f1b84cd26f0ddb3dc7febeb392a760e55a1df20f99c1c301. 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/CAUM82300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6f05ac7285cf9ad3eabb8a7fb72333f95de53ff322103806e0add03a46701b. 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/CAUM82300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d360fd4ec91c3efb912022f8d9dcda9946e3a76772158f55e5b87fc6d758a51. 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/CAUM82300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c719b05ce76505dc89f58dc6039f9ca624d71e2999d3f76fdc283057c4f57a1. 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/CAUM82300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29d47609f54b91ad3b70e4515fe0a444e800936d61d835b02f910bd9659e0cd. 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/CAUM82300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d62736e5f7f318d4e3d9fc4fb403a287e316f1e57b20ec7ef5cb0411de7ebe8. 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/CAUM82300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d7b75488791b3f8aaf106ea42ae80e9724e827e67f278d980c404a8ad5593. 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/CAUM82300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cd88c1cc910a573dfca2d4989e60fad323ead096c626682ee17be89115ffda. 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/GB8X82270181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceab5d5a6ed35f7437a8bd74ad575cec53973facf402442535e31154ea5a290c. 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/GB8X82270180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a47dc77d711be1cab5bf43a4e64bb1b6b70186bccfdbb5ae9e6a6239175e52c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GB8X82270178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5517d33b5fa00a05487fa2a2e107301d7c159505e1d5826ac295c5372613661. 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/GBLFP2280898.