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 0xe3108d491faf3e530fcfe7222767654e3c23451d4dec9931be788567d8ce153d. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c62079cc-4343-4413-b091-82aa6fc64a7c.json and https://artists.proofprofile.net/proofs/artist/c62079cc-4343-4413-b091-82aa6fc64a7c.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 0xe334b44237032043e103cdaa8c5bb9a2ad38e572b3c69e69cdb55c0055f47c21. 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/ES6640100805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1815dc972bec45d2a8e70e0ec22c6280f9aa2742f0cc2e09ba2535e4cc70da7. 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/SEVMM0513014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918f4f39cccfa3800d231a866315b9734c4e84f8c5bcd63557b6dd32f2eba804. 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/USEFC0610312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba446a9314d53d7bb9d8b245631c43352cd772eae8ef584824c71bfcffab5706. 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/DEH629904301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1eda1dfeb83c52e3ef922fdac145c3e1777affcfdf35da95bfd7bc44a50b88. 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/ES6640100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6618d579948e8643301c40532dfa61fc85abbfeea1e2334533f3dbebe646a4e8. 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/USEFC0610317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564438ceb281b8c77d73d936f70e5f2092db8083ba54a6182643ce4beaabeb63. 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/CAE380400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d60275b43241a81c06030b33b143e959118d8982349f35aa6cb1a28c8690a5. 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/ES6640100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea949f93bbb0671227ebd3a9d1f360a33f262d06defafd8eed8d9993f2d0b5e. 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/JP92N2279692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bddfd061af85ccab2fc0806be1251d2a969331fc8772e4e09adc6424a251886. 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/USPBR0502429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fd6cc8ac5279bf8219f087f9595b368d20562fcda6004800b661a4f7c6a8e9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USEFC0610323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582252fa3020a01ca7582195afb53ac31fd0d54c01b56089df053296a54b637d. 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/JPA960590453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939da6cdda81240694a6874d3cbe673c30d31e12f46ac7134beb2c0c55b11f4a. 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/JPA960590454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3960c031479f11224214038c181ea5d305f4b3444360750681a4aa626c7f8d. 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/JPA960590455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1d481e80439060df083ddd6803c920cca423a30fa9d268c0249a192021a9ed. 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/JPA960590456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438e30c49239cc5c711b5b0c775d249ebf1fcde38d2f60605ef57739740eddfa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPA960590457.
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 0xfec72a132a864be2c9f224ea151257a9689c483f6677bd377f0fb7dd7750c86e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPA960590458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca736e669707632d818ef83d32506eb98efdc805f3650e3be4081eae91b799c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPA960590323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941716acae600a492747c552bb6fc3301ac9d08c00fb3691ecaa6db377ce9617. 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/JPA960590325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947858317a20615b7b89d8eff2daa4f927bddcaac5bc52a708107bc9a4a711ab. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPA960590322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5bc0b627f2105b1561e4bf477a187b440197e0244a8ddb451a0897d2581efd. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/JPA960590324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ba199f321c8322dc363f2c13b53cc1c63d40fd20cd8e6f045cf2382800086a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/JPA960590326.