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 0x6ac8a54decbd14f9b9084801fc02ac5b7c000f130ce1849b07f47c7bba65bd83. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4884073-4f06-43c1-834a-6d6af67b0f41.json and https://artists.proofprofile.net/proofs/artist/d4884073-4f06-43c1-834a-6d6af67b0f41.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 0x67ee19d5a8bea3a42348b65d3accfbd628e17dfa5fe25c4e14a9ee2d5f6d646c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAEF1997566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe529f2cf9ce1a49ac11088c4113c916d9119246c09f45dbfd3759a51f3b4d65d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:51Z), 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/TCAEF1997567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa562c349091b6230bcf229f6ea6b4d48fe85c16137702ce08841cd4476e7b8cc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEF1997569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a71b2bad6decc2c2c5504e81c9823e069471432c388d84544892eb9bfd7306c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAEF1997570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab25cde2a8099c11531e65200555ae9c56a30b3af4a2245d903dfc30a25bd8d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAEF1997573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0eceb58156b9209ac425614b6b41c9f8e86709a125142bd1d65440be591fd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAEF1997574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b54473e0df8919a3af37d4eb9ec4296c71d7ce7aa116181b122d14ab67fd63a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAEF1997575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb857f815b4e06a30ea211b613b8e9e15d5253b16be3954ac9de7a7e29d623. 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/TCAEF1997576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3d9be5433f8dafec17ce302b1c534d76cc870e0327d94e354ecb60c37c03ed. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEG1966691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95473edc0b726907772e16a5ad924783d4970e980ff477030b92f0d2d905edc1. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAEG1966694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8796db84572ba6cc9181a30d250117230b19f53f907ac2fc62da5950edef4949. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/TCAEG1966698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8903c44acd30ca756167eab42253198229c1807dae84a5e078eedcf451cc69a. 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/TCAEG1966700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf2ed8d2802b59705c270d5a46a7bb461ea301a585fe351c8a2089b7d0b7c01. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAEG1966701.