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 0xc7021df7b563a49b52725efae08ff8da8f751f13f20f58c991ad642b5fe27761. 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/ccc2949d-ff9f-4552-a2f5-8927b0f8aeb0.json and https://artists.proofprofile.net/proofs/artist/ccc2949d-ff9f-4552-a2f5-8927b0f8aeb0.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 0x2773e15c6ff114e886f0a078f48963e8e661ba5f1de3f909f99a99fe845ac73b. 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/QZK6G2301633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c79350d0c299cfa40bb552cdcdefa371cb2d1a4adb9c2c1a8c7ff08299531f. 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/QZK6G2300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7ae9ca3e7148081669b99a6346bde174b3b0c6a35eb7cfbb02f0e0530641c5. 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/QZMER2372656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0823a6124b54592c58e7c386431e29b7655997569697ec7bee06a38071512f5. 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/QZMEP2389382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5486cddd7515fa6ba638b42294e5b26b963e3c9dce1aa7e6c4377d1097b52d. 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/QZHNA2394339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2189461b6e4ef47c3332fd745974f101636861506284ed2cfb108bc8539ff81. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2376004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87b8fb58aaeb14cebaacbcc9e5a3618138b59988d8d4dccdf1ff0c7844ead5f. 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/QZMER2372659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7280cabcaa510a9a34c69a759b7d0aca759a8c6827058ec2eb4cb49ecc7d0e0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZMER2372660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d97c0e1389748ef53e7a3c16d41e46ebced4a8fa8b57474e50f960b963e252. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZMER2372657.
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 0xeb00ef74e292c34fec84db236edc0c3209670a548af68ea761d41643467b4740. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMER2372658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ffa8158b6c66239645085f5e495cf568d14c7063ba52f9ede322a495579e7b. 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/QZTB62326319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf496be0a10d9cb05eff6e73c3ec9ea24e7c32516d8da15756c418ff8c0319577. 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/QZK6J2084872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65c457b700a960156d005e375ff267cd51e73764b60086fc9eb9f7a944e11ff. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZAKB2169781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8edc0dc8e5615d713fc8e1ae360c5ef1d35087c01eaf3317f88535fe2191666. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZAKB2169783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a5a23cb2bd0b229dfa06c07935b875abcc8b73deb06e917193cb99d5244448. 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/QZAKB2169784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd1a109c4ec4c55e51c87fc53dd7c3497dbccddc4a7839735507011abdbf909. 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/QZAKB2169786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a9785dcfc467922c399c522cff7aadd818e2b984d5dcb8e67250fa1d749399. 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/QZAKB2169790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dadd650cabdeb968344c134a35099009d9da3408cd16f7a1ffe3ad0c42d2e4c. 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/TCAFS2149913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e683f9ebed5112dffca0e4a7a6948451f7747e12aa4245c625d801115be04. 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/TCAFS2149924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e560ec409851e4c14c1fbf02fea2123ff90de89bd5a34521a426765217508a6. 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/TCAFS2149928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd185fb2917f047894932b59b05b19ad5900b9e06c1b2d3426e2fa338c17fce3a. 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/TCAFS2149931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cc50ad75dcf492a033b165bbe2b9b6891c6b075b894c467d8ee615927c1434. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAFS2143978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366fcf78ac44b761ab5d68b9e5bd963cf901c456d6eb531f7e99860ae0fb7a7f. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/TCAFS2143979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdb7b9729ffa4b17c223c579cc0f3079fd4a8a8df116531e3db4006bc135e9a. 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/TCAFJ2103221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c5ffa888a61965ba88af321a1f9760398646919cf24afab903d036cae087a1. 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/TCAFJ2103213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a2ab157cfbd7fbf50948327175b8edb7173742333d7b7e0920621023c843b7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAFJ2103216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5061279413c9757e8b3bb4dba74c4fbae1b3e1a85c8a24caa4642c1804b578fa. 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/QM8UE1400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e28dca916096c31313b02a953fdef247c0ea2276ad0000468ab221687320f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM8UE1400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9df502a3c5a96c127e29cb74ed2807fea4db190b4a2214748e5d56c4d0710d. 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/QM8UE1400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5ab0ef1ee4a34223cc5a9a0d31fd74042b50bd90dd18c117c63536f280cc9e. 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/QZTB92338246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7111c392fd65413bfd991277c05fcb54d07c84766dece57a2bb4e44b1283e0a4. 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/QZAKB2166783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83ff4c8c6af48dd47ff77b0a0d7128a8bae706ceeae2026d8802bd41678983a. 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/USLD91725659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af521ae9e345985052b774908019d77246b822032a09cf67f46cc893101f9d3. 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/USLD91720775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06acad0801f8990260c92cdfea55e05b4939b9ac9c5e5afea50c0e9e2217f60. 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/QM24S2404778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381d3f187a8cdc13a74550288033caee66be022a78e4e90b633c9b6f3da4992e. 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/QZTB52214125.