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 0xfdf2d65dc5ecbe6cc22ee893096570b7ba583b0d293b300946e40e7c17e9cfe9. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6260187-d0a3-4e72-81db-0369ea830328.json and https://artists.proofprofile.net/proofs/artist/e6260187-d0a3-4e72-81db-0369ea830328.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 0xd62006985bc1af82645b3bfa9d3bd2903dc8ec8cd40c599f442c9c7832aab6a7. 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/QZFZ22313676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dd5232007b76c64aaa9cda99a142913f07be1f0a81bc653cfd0ad302d76088. 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/USA2P2237235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf85ea0883a681a584ceda5a340b8751327e95db0e6c121a42b368c33d584a2. 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/QZWFK2390811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115f6696b2b092d7fff112c80af0b843a24738b35b175f03359d5671ec8f2009. 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/QZWFK2390814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a07484c472981bf8b3d6da2e9ccee1c0d6c6eb1fa55e07ed7f6de12fc6853. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZWFK2390815.
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 0xf58bc52078827bccbc7ec92a3d4eaff788f44c465f3ff62a358b9ef70938c533. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMEN2357656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ab3ff0f92faf5529ae13e2afab241dc2c87227529e368f6dec4aefe2845d3e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEN2357657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bdaa4f5e2d832fdafaae954fd808ae92469785a47ddec6f61dbbddb1773f53. 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/QZMEN2357660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32949fc001e80dba44c2e10102ff6f36dc58af79957f92567d3878c34fa78533. 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/QZMEN2357666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997245a473e0d8a651844e73fc18acb2a5075941983b69ad31b159048dc26b85. 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/QZMEN2357668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00fa062b130a62cc71e8e4fa7199d3b98e4ad3333e7c8059f6d9d629b255091. 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/QZMEN2357669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8307bb08fd7e529fbfb9648ab75f3fc86a086581b42fc1a55c0f2e8033cc5d0c. 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/QZMEN2357671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ed9f8ae1c08d1e0f301cfe93e50bcc53668c99059ecb3738803f6c2dd79859. 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/QZMEN2357659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead27edbd0184578d345c28bd1120e1f08692cb61607047c4d8a7d419f54d6bb. 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/SE6I32420607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a1aaf181bd6762b0d1d7fa10747dde910de58da7a7efa3c35dc334c6c00a6b. 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/SE5BU2472131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42b33e39fd5f4b7cd0d767f8ae9c4a4b4f0ae0bacff6f4818d949d1683f1286. 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/SE6I32420610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a04fd84edc001729526f696497c0dd4342c0bf5e2dd6d8fb0fdf81e1d4da11. 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/SE6I32420611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1565239d357055b33c4278903e1e7399ac129d3f568583a5d281661ca06068. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SE6I32420614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f84a88dc6e497c52eedbed85ad2d38108704207ca5e0dd377eee51d461c9af5. 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/SE6I32420615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96644fbe7949af98b78c6f5e35223f63effb3a9b18b9a57327a1ce83778ed3e. 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/SE6I32420616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2722b78b83f277be6d3372af68d0afd6747d70677d0a5f357364071271584fba. 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/QZPLS2457892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02460568e9a92d00f8b7469a92e510d490c2d06b49f88ef2d921f71e2d0c8ac8. 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/QZPLS2457893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68f8718082f92014b93fff6251877530d43d083da1b411d8a163526b34d6e22. 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/QZPLS2457898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b1315b3422b69a6cf4f1d67e6444dc25b8bcbd8190c8413d57ed194bfefd20. 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/QZPLS2457900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e6e52a3aa1f41596cfe485841a2bfa1ea21fa880679fda5334c1b78f23976. 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/QZPLS2457894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575b5beb3c2307cb858739c2c6265bcabc7abd03e155e2a9d3f85a60d88fb943. 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/QZHN32335916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303409cb9c75509df53d1fc43cd694a19566df08ac06a455df898faf84d85b86. 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/QZHN32335920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d9b10e6afcb45e1cf8649c5022fb481325a4b43603df64d585dd1b69d408d. 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/QZTBA2242266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c96e500fa64aceffba624dfccedd80a439e1533cc3f28f1edc0c0a7947f7db. 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/DGA0M2316038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35821479743051e2d758d6b6783945946e4dae2c191179a4f34fb99ac81e1420. 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/QT3EX2411552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335bcf3f66c2ed00e703a95add5b258162b6276a8b5f763e0e832f18060de76c. 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/QT3EX2411563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e25ebeb453733310a522a1106aaa48817430172fbd26782691a75ae229063f6. 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/QZZ762490852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a916a8a6c53df639d09e8c074069133cc72ac73bb04ce75487a813523ca85fb. 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/QZWFQ2466936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24815f8012d52d57db8c7af431fbd250923e010e4693dd6fb88b5f800a26e37. 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/QZFZ22597902.