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 0xb34f96f9fa569a7910e9772dc81b3170f088ea5b8d83599bf2b7fde47d78e997. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/210b71a0-0c9b-43ff-a556-cef9494b720d.json and https://artists.proofprofile.net/proofs/artist/210b71a0-0c9b-43ff-a556-cef9494b720d.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 0xe5f5a7ed7d02274025920a89a11f2cc454d1438f6ab2e713512520ae486aab81. 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/NL1VU2201178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556645b7cb752384d5b3c7bed5ecb1aa55add52d7170bd367c0493d0429ad1ef. 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/NL1VU2201183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee738d2d57f4c342e0727ec95733af7f7efc8e8e9910cb1816e21d490a827c. 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/NL1VU2201184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b1beb472eb057ac34ff87928a4d6f42ee89614a8295cfa4ebe9d3c9e14dbe. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NL1VU2201185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23bc83281dabd14cd0b6fb6c4309c817fc22770eadd58d32cdf8112b08248b5. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NL1VU2201176.
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 0x6d5967b2fb81e6800e1a81a710b36a0a4f58c7ec2efa07b22f04d2d47253c36a. 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/NL1VU2201177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd738c6524aa2a8faf4339b8cf1c2d6f9c6a29c1162f6ebd15067b19757d2b. 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/NL1VU2201179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc57f86d8652f3a2fc62e3ab63204e58833af9747389947511f0dc7cd2bd530. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NL1VU2201180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4ab520a492a87c4b243a503dd238c456346633d75d1144ec32c3945c7cdf07. 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/NL1VU2201181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9049f765f752be54dea739804487b7cf9b56a7ecb395b40f32f652be1795bbe2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NL1VU2201182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9128b25b7d13b42d3dbfdab31e8dca8e7d9ded6ce71ed03dd844e25e32c3bb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGJ2345624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea2abcbb99a8c8958345cd4195071def150cc4983e6644367f415c3b1cf407d. 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/USCGJ2345625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc1956be4365b4029740b653b577abf6be375f7d624fd256407a96398292ba9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USCGJ2345619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55b1c508a8f1e5fde033648f183c1d72509a3c6ab755821cfe02b3d4325947b. 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/USCGJ2345622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b47af3a4daaa617fedebd5951dcbde86ed86f033f7b0a170ceb94244575b680. 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/USCGJ2345629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d643a37d8a7a99ebaf0148a904090841862539c5f6f18739d405cc9d0d9e79b. 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/NL1VU2201189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9944b9aeed5ccb8973ac29e033d59183adf25b0d3296e916279e40dbef59731b. 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/NL1VU2201191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57488b7d0152122054f22cc34fc74f014c1f03257cd98146fab2fb2fc7f7391. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NL1VU2201186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e287a4d268751f07cb289aaa251836d7932d02efe7cc969e1c4c1f0373c99. 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/NL1VU2201188.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4793190b4468a42d75283efff4d8265421e67eda69ab19cd6913a5ac54f7adae. 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/NL1VU2201194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafcf62558ac344d3c529ad594dd5c53930ca592aba632f85302ab38c272b331. 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/NL1VU2201198.