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 0x0c5dad842297a78043b3a5d8a6b653820ba1c9aab6cc232b65ed293b3b2fadbe. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddf39558-28d4-44c3-8ddf-2c1df64ad8ff.json and https://artists.proofprofile.net/proofs/artist/ddf39558-28d4-44c3-8ddf-2c1df64ad8ff.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 0xb9188f46d1680664a0a25e7353a9c1585730e46e5c2bc5d8267d04ec854edb29. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USA561088540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9188f46d1680664a0a25e7353a9c1585730e46e5c2bc5d8267d04ec854edb29. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USA561088540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d7c69146b7776d20f95c68c849f730c5379e9ff7d33b2b85ad81affc1c9f5f. 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/US3Z41800482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d154acbbfc254b3627bca6263f7f6bfb2d34b88833b7640b6da646e05aea653. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6Q1992869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d154acbbfc254b3627bca6263f7f6bfb2d34b88833b7640b6da646e05aea653. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q1992869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e7c3e1444edca20237fffc36b9786b21c4a6845ad6af37d157d0f2bd672c27. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN32072689.
Llorando Bajo La Lluvia (Bachata Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69414a38829c036a87a680a6ff387177f1dde66b29b293d0185e4e9d1c68060. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNWT2258125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e3cf35065aeaa29d0efd85194297733d7143e7e7c35848f4eb441d49d67ae7. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHN62378244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30395a8ab88e8afed513582ae5338cde40bfea6e106f1e13e8b795c73ad84d68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6L2389158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e7fc181c4b1c2640720bb752e366c5c2a4ac84c36d1a5045092aac71b5ce5. 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/QZNWS2350812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8642abd51a9f84c74ee5353cb84a2341375df5f44fde7d9116d2c763bc0545. 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/QZTAZ2360962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e7fc181c4b1c2640720bb752e366c5c2a4ac84c36d1a5045092aac71b5ce5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWS2350812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff3ae6ef16ad5f84c72a0e05d5cc8e0ab4d23b3dbf445f7a0d996a2485f0bfb. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZHN82424157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4716109baba8141847e6d0db3ed4d99c2b39500ad8530c3343f527dc1d47a5ff. 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/QZZ7W2459300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb9f001790c659838247a08ffbe62bebe33a2afc63ab9f059f2327aa76a1d66. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN82448616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc306a59b879b9f645b16fa7debeff04f8849164e9ac49cd0b9bd3a7400127635. 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/QZTBB2444722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76fb348deb35b789faa0aa056a9f3589a62cd0192735bfab920b96ff0104bc3. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZZ782472658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14356b1fd677e9d795728cdb1bcb0c846a57f5e217a36eb725c209a0bf182ac1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:16Z), 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/QZZ7W2457732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb5fc43c90e9de7fae9bae2e626cb3f1be828f9814799f96e03afc412e128ff. 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/QZHNA2560218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68721b73a49ff62c73dea013dda3a348d5996042a04e1550d07ee6cc1864d962. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB52547577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d60cb1d7e8190752e653d1afa0cbdd7f21f5cf20c55e3a260ae1771e351f883. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:16:58Z), 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/QZES62456460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb1c6cd2bb72012b55805693a3a2d9e4af16afec42a8ac7cd8982d43f5bfe07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES62289413.