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 0xf413c2b8dd57f18487745a52e640e5eb73b82c8f8fac0c87b9204b46a998e865. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d904da5-917a-4718-8e1d-efea2382d391.json and https://artists.proofprofile.net/proofs/artist/5d904da5-917a-4718-8e1d-efea2382d391.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 0x342b4600217ea8e6fc2c7171070d1e1404ca177fb770d0e81308ce7b88b95358. 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/FR10S1971856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1dd76faa32d1cf43372ce054947270929b855253e9588c3b74c2ea827732f. 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/FR10S1971859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fb40fd9ca3ffb3e59f125d32370704a7e8ae4487ad1ae6d0d11e69d32385c0. 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/FR10S1971860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71661d4fcfbfa995fb81d5adf073dab07c467b47ead0b725adaa21b1af23ffe0. 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/FR10S1971862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0224e6c45c9d4c92cb1244160be3785305fce4042831ab5c97dc67674f346ca3. 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/FR10S1971863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f99f862b3cec2aeb63ccf7a4e5ba0886fac526480b9180bd9dd88154f1208e0. 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/FR10S1971865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7721467228e985c49c88bea204b267f072e25ce9e20e82867f361e3fa0694f0d. 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/FR10S1971855.
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 0x5a7561f29a539823cbef380e105b0cb1aa5340e1a9b433614bd366cef321c5a7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR10S1971857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9b3328f685189dd023f6e2ea328cf7ee18aebca01feed9a66de283ce61446f. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FR10S1971858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852a9e4deb420e64b080a5308c8da288bac97d1874b5f6bab078ad8679257a99. 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/FR10S1971861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e8929395b2a2a5ee7c4dbb452777dac8a03f8b627f9a59dea877979a4aa367. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR10S1971864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05642b3c253c13942689d49b46354fa28e43270ed0fd200c9972935b7a8afe. 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/FR10S1971849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d406676b368f719a9e9d5f2ef4f1881bda5ab6f4cbb41eaf6e95135b6589a. 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/FR10S1971853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7690495e8cca08a31f67f053f39503062bfe522fc511f2c5014f13271bcb1c77. 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/FR10S1971854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777731f25647f6108f213a56b9b8a1da6c4e05255658862f887b8143f4d78eb5. 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/FR10S1971850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233a306e19fa03e5779e0c186ac93c7243d98e1f5ff62f459e96b581e0340903. 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/FR10S1971851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3db5427c0a1fa92e6b9f217c969233ed98eec5e1776e45d82badef641ca6eb. 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/FR10S1974969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fbba20d2fde94c787031276d73ecdf123efc4214c95d58dcc2874dca727631. 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/FR10S1974970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8335e653330269c5738d26a3ea9c4f2213ab0d35cac08c7b9e40a3f6bd88213b. 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/FR10S1974973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86b0599dbfa89d7f66cc326917fa8a5fa70570ddd9094a57372b9a2f3fcba83. 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/FR10S1974974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbb4dc0df855d5fa46aef0a7825079ff3226319d75ed119aabdb5bd3e501daa. 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/FR10S1974967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dab50f55c0c82b860a94b442ba46b9be0db039a6ae52f88fb923562f265f45. 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/FR10S1974968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f7b8134cbb073487ed3fa8f34a41c2c845a8950c47f558b7dd95daf6d967c3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR10S1974979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb7bb2ae40747b0a86eefccea075c53aa8b7bff3ddcf5f4611aad8f1b50f6a1. 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/RUA1D2495236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2ed45604df020dedddc4774b718bbe9779cbf23862a0d5bcaa64000c296a10. 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/FR10S1971866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0206f20a9bce46c73f15b98b022af67b771c4a81053d8cd5b99290e6d62c7e2. 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/FR10S1971848.