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 0x5b43a4742930ddada4b35e0b3042edb839ac86a6d781847836faed0665a1b549. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccd60fa8-2fc8-46b7-81cb-a0a2af9d0269.json and https://artists.proofprofile.net/proofs/artist/ccd60fa8-2fc8-46b7-81cb-a0a2af9d0269.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 0xa7b682ac1be3f558efb9f1a952e3f90780eef21a3145db15711b07fb8b53152d. 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/SE65G2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24351febf5e06f5a8538509f8f6b87dbae1533c0ecfcb3a6e6378044dd9831dc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE65G2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ce2b23cfc840029adc4b15619c98a3bcdf28a53699c835e2ba17350929f67c. 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/SE65G2200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f96108b647fce74be99bb2087880570f45761e021a9b6127bd4f112caf2a33. 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/SE65G2200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efadb9041bd97bf9dcdfe99262865cfa91e53c6ea5e3e3324750990751a511b. 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/SE65G2200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde53dd7d4a358d923fb640e497b8e29e16086b3b276dc92e83387a7e003fd08f. 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/SE65G2200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeeab5db068a85ae53f6e8b738098cb2c73e2d9ddd1d1ffbdf9a2aef4b899ec. 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/SE65G2200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663e1f9138e5fd746981e5425fca595ec949c4fda6eedab64f34e5f68bacf38. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE65G2200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e99bcf6a070e256ef384a274d1df2d75d6ba8f433743ad95e9196e6de0885b. 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/SE65G2200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad41ea9dbd67c522d86932bfba590eb344f61e003bebb40cbfbf6497e1a5579. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE22E2001301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3f90a6e0f5d8c17b363498c84a0410aa378507a176de267eae3b7fe9179314. 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/SE22E2001401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fed56448ba0f5a6b39c5d41275b0179ac29861da0b08969bfc9eeada034cf8a. 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/SE22E2001402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a089f1609389eaae75dbae4b8b555d99dd429f1f78d513c500cbbd2f277a7c. 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/SE22E2001403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b7cf941e685ee9bad5c82bf8339f8862e815340aff05b0830cddff59a0999a. 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/SE22E2001404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa108c433b0915dcef81e5671cbcc23557cca38ac2d4adb37a5798e21052c9c. 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/SE22E2001407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbfb67c8ade160924dfafba532729facd3ce57f38c452a217f3ddb95e6f278f. 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/QZDA71952998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b124a155015c2569b6deec77a7b489d310881801f7ab75894ae345a97bfca8. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZDA71952999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb625bfdaa2f8b32f516b92ababfcce249d97890b3b8093153ef5606bfd453eb0. 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/QZDA71953000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bce6c5160b330f78fa750ecaea3590bdb88b45cdd01d9b2c066b63cdcbf53c9. 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/QZDA71953001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dc04848d4965ac8ddb034c5e37035951e236a579dce7fdc0d122e3357bf3e9. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZDA71953002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed65e07ceee5eae507321d96bf6324af23af0453d4fa21c5f7660a38c4dbe80d. 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/QZDA71953003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc679b7fe3263f495feaf47b991e187629d73350bee95d3d23f11c4361f2a3. 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/QZDA71953004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9878cac34ccc7e59285964f04c3034345ee3f29bcefba4e8997d3bd8a8d5d82. 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/QZDA71953006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a35b8eadf77e3e73eae8516c7238827a3193cf2f512a0b33238f1c9bb86d348. 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/QZDA71953007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ffc963aba08b73fdcffe8ddda6c7aa99ced3ee7ae917530e516454c56a8dba. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/UKXN22362698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e86b2f4ebf7f204dd7282405f0ae73d4c5a94496c60526cb696600dd5740f0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTB52380907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e554c469555f2d218feeda12d2307f58ba9a45099ddb278f84169bb05f3de5c. 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/QZTAY2354006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1c03eb517a81add9c466ae1f5fa5c0dbe85417182e9c439233010a733b9e0e. 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/QZK6M2175412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a2563b055c3e53c4ac41355dc7ef6855396841bc35ed1823ce38d07512bb6. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/SE22E2000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e4acfd0aab089f924e7095a524eb5e91e1dce122b5295a7b3f4d7b34b636c4. 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/DEN961902361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202ecc58bf6db3a9e95d482c675865fef5937c10d860eb18d78212c81bb1edb. 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/QZES91936593.