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 0x17c88760394bfa9fe5faaad4fdc0a22e57b6fadcd59523d9f2de4538f6d03988. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/998a97ed-d5a1-40ec-9ad8-66add9ec0a45.json and https://artists.proofprofile.net/proofs/artist/998a97ed-d5a1-40ec-9ad8-66add9ec0a45.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 0x3421e29912ebc6420b380794cc72376ada7d8e6bf1dd1260fe049cf70bba37c6. 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/QZRP52447655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b8d3542956015dd155ad4ef2750ef0aed13e392428688a479bff3dad6e36ba. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZWFM2479681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b767ec97225bfb7ae381474e0462d6294b35e534e69b319181b232be47f714. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZZ762476027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802d047cc0f02d17469fd2cfa2328bb04ac2fcb0a46ac63246140d1c15c5c827. 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/QZWFT2413095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09cffd0e21407b80b4fce94d08e97a180978cfbe089089b14bcf14e08c2e01b. 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/QZZ7R2474626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0676bc5f3ee3ab45704f529908028acf0e14ce517cdfb7e3cbd77c0836f665f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZFZ32517144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506845b4304dc5d905279860f558ea2f4e7b8271a96586054b1b865e7a38f673. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZDA72569533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fbf9c0c92fb4923542eaac156b278101d0a02108a60c147387a246c924f844. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZES52588975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731cd995123c68f84c9b33344f4814824da29fd7fc1e0da3f0f8d924dbc5d2bb. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZK6P2515308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6784f11898dd6fb9b093978bdd4d5574c86da7f480a1cbd2a6a5e166e7d50803. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAGOO2519742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f59923f42ae84884ae7dc3345255a9c245676056bfbe07b751cbe40f99b63. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAGOO2531903.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cb06194b6bd07b1965f5a648e8c887f9d244d1572cb2e98ed5f85eda767a0b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFT2413094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a93cefd02c9dd6f6964de15595e68211317a344905a4a92cf721e41a7528a28. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAGOO2519730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b95756825cb0a7a1c7cf3197dacd5a7e2142677d212ba6821729a41f7eff8f7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6XW2565202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce0e29e32e1e32bb29341074c6cb7da646ecb1aab3f527a1b25fc906362488. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/SE6SA2507308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32826c16226657c143dc104cf53fb130d589606dcb9bb1a65ad8c8e916e5a1e6. 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/SE6SA2566787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75c2f3674163ad68fa218cd980072c96dc0648c5222dc644f42d5c4f257952a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE6I32517267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde036c914c99320e92f264acc78fbaa96c42a206cdc056f478b4e8787d4897e5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6I32545287.