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 0xee925cc5b5645e895b6a2cb4b6d72490f70121c2a2dfd20dc38b36cb2d5ec353. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55c2ff01-9eef-4d9f-8f8f-1e81affbc0e8.json and https://artists.proofprofile.net/proofs/artist/55c2ff01-9eef-4d9f-8f8f-1e81affbc0e8.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 0xc7b564fa9db856866e155556bfbfdd862883afdc621079af521a6f3d0ed3a92c. 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/GB5EA1403360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487e7c835603e54bb90351f0b8aeb7424d7de9970d10bc29e94d50f3df775e47. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GB5EA1403363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af5fd1243ce8dce5fe903687e3a1c64310bb7bbae043adf59d91775b6ef2c22. 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/BRC9R1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba06f48d3eded600ee81871f280082c7cb6dc02c7b588c7ec8d478809d7470c7. 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/BRC9R1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9858b5322108d8d9619e7f6c67bdf993fdea3d373d4ba11266e4958bb2c5c. 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/BRC9R1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e082df20c3d89453415a3b67a4183e5d6c532e6ab05cfd4231b4df88a7a20e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRC9R1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e170b95c9f5ee701a302e67b965a979fc158beb987a885669855016da1aaa6e. 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/BRC9R1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b9a009a9f61a509be54c5f4d4db12623afbefde0a56eae00085814ebc2142a. 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/BRC9R1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59217851c1e20e3cdb9cbfdb245a72dc62fd0c88ef6033f5f82402066cc7de1b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRC9R1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2158661aac930e4ca3975aeaefe86c396c5adc81d5dd5ce750fa1bab8f4f31. 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/BRC9R1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c02ba28a4a997db6f94c2633556abbb228c3839e8573c2a108dafe6f5ef2c. 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/BRC9R1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca48a7a48a1bac8582fec098cb7e3ec036342ac4cd7cb159f12b2b0f5c92761. 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/BRC9R1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03c9002a51a2f2e0f91727ad5c211ead54112664bf8f9add45b803de5706b89. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BRQDY1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372a05200b36bcecc5eba8bde103bc8f48efeaf0d2f717c601a53487cecb8204. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BRQDY1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e45cd9ba768e66774e141b1315a87940ff2516e5ec647cca3e87abed7bf4f2. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/BRQDY1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc3411043df4a5554fd0f48c7b20190bf96dd39b8a093b33394a8c1602750c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/BRQDY1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe33ecd3b10fcd3cb0457abe39e8522cd3d16cdf42a590db7b8d604d88321307. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BRQDY2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d9134d41569c9585af0225cb1391c3d9cb78ec30e111b86b78b6bb4e4f4b88. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BRQDY2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056f4545331e856726559ff179f9c92fffb6cbd308afbabd1fdfe8692c40785f. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/BRQDY2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3701f51fc70c211a6f2f39790a1e11d6fbadfcb8381e7380ec4076a8ca201eab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRQDY2100001.