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 0xdefabc778850111265773cfbffb18e05cf5ccc863cfd9ddc4d5780c9efda5cc5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f40f1a4-3c65-40cc-8d8f-a3a9af0a0549.json and https://artists.proofprofile.net/proofs/artist/3f40f1a4-3c65-40cc-8d8f-a3a9af0a0549.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x77a0cbf41f2db1f829bd064212a4cf02f18afa5e65920522a7b10d8cd1620dcb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6QE2109179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d84a82bfd62b9f71c62509a0efeaf72ee159a7a1542d92c2483314147533b2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEM2118641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8e7af07f3d5235930f42d2515c8834e161879f8eccc8182043e5913727b487. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:46Z), 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/SE6XW2113036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f0b24372ce89e1bfeea42d597193d0f9d62d0eb5a608192a27c54c10cd6196. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNWQ2178437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61a83fe7bd0f0d6d0b32e5236f279e325fed1c9fa312ac6eba86b0ee40726cd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWX2169537.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488c6c0b548fceb162f33aceb3c65546e7051613deb689a88087de50a9e1b56. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:13Z), 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/QZTAS2136853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7f98ff56fd5534c279e524f18e597d854e43d12fd051fab3e1acc27bb2f07d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ32270020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b63d993f4c272ac776e3a2c058af5e4d4299354e5d77eaf8746c708825b048a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES52248322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aac83f6b8cd4724dcf76417fa0b13d69e4a748f48134f4b03570d8e2940e357. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES82241394.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce743eb27bc5edcc9eca32faa855c921731d85ba7d3fea5d1ecd5ed6354a2f9. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZTB92282123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd591ffca145887deb2cba4e408b8c38b715c4dd15598f1d9d019517083c4048d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GBRKQ2387187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361f619aa4659f380179a1150d206a47be4332cc6880f0be6d37247a881270ec. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBRKQ2387299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4b3a299e38dfdb199ccb7cae469e943761a6f67d4e7e0c1caeaeb32244d3ca. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:58Z), 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/QZTV32486183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529372cd05fbf5e6d7b62e23f137e50d3d89be72cf46cf799ae19089f3a73cc0. 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/QZVEM1860234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd32f63be2e495081b071684d890557c602fa0c628fc980e0e1cfb2536747727. 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/QZK6L2268902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431feef9c16ee1fa4935fb8c2c075772d05c560f52fac651d9bcefab294e70a5. 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/SE6XX2292359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d806b6d222c5b0a4560c04ac13e41b65158d7f74f42c006de7930d456e4085. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:59Z), 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/QZK6L2351099.
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 0xd6c88a56db6a579f362f21f408df16ac04d1c15129111c37b61d36d1711656f9. 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/QZK6P2275641.