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 0x6d850b1d2dccd14677f6495409f565b1731358064b44073604e19f07c51a5b9c. 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/fd955e4e-7f2d-4617-baa8-03c4ef79c949.json and https://artists.proofprofile.net/proofs/artist/fd955e4e-7f2d-4617-baa8-03c4ef79c949.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 0x6bfcc191905a7e98dd82536d21290a811f49a47d59806368c56026a5dab97995. 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/QZDQH2370678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5850c0b5ae1e7cf3d8c6198c1223c49adc4f52892194a4ee75d46dbd4f9fad7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS2202994.
Las Favoritas del Público, Vol. 2 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f3400aa95ffbd2f2e5712d51ee6ddff5ee3aaa10da7b1101f6b4f06a35675. 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/QZDQH2156528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28796a841e756186be5f281b7ecf2af153ce5bfcc3c9f5b8149c2baca7809c3c. 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/QZDQH2156529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4c74f0783d7af284684824b1c3a7a7c54f85544de25eba1a3f5e98444e2012. 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/QZDQH2156532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3facbadc07a82d340144bbf637cb869c7dfc2f0dc50c9067835e8942ac471337. 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/QZDQH2156533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a8bf8e648a83683f45e6c7853d44e01f508d354443d9b42f8a6fb9e8b460d7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:17Z), 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/QZDQH2156535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe322e978ca74e1a2b48d68bad75ce8aab4e21e838f6567df731268d3f6177056. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDQH2156537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637e03508fe7c937a5a62df227e64b89b47c1c3dabe79641527011120ccb7363. 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/QZDQH2149442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856031a6864b05486b07c8263a72e41e6b3fb5750231ee6a1218f6fb7b87815b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDQH2378307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9aaab2a71b298c10401488f5bc8c95f013c11446be7825da00e7d212664266. 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/QZDQH2376572.
Las Pisteadas Del Güero Garrochas (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502f84d8170fa2138b4f306b5dd729d3d269ae7cf7ebdfb22798f36bf167ce75. 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/QZDQH2371118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e85e774b5400e179faa87482c1effd406cfbcbee27a920c1129be57cb4b56f. 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/QZDQH2259982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb96bfd7b3e3093437bc32f74f914410116f439064821674a98b31b31018b67. 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/QZDQH2501431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1881313f6134087d0dfa1040a452aa204fd9091d29d7f3b3ed66d492ec416a10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDQH2501432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96659ddd6bd48fe4bf0e956f695422a867278d53a01773a3348968fc46281691. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDQH2501433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480c9e3f9df68141583347d03e416731b36f44f4e3c6952180f3571e4aebfb42. 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/QZDQH2501434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ba37935c4e7228d13c99f43b0f75d46436eaa37e46cf1ef57d80860d031111. 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/QZDQH2501435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1629bd9e4a6828de26b711e80135d6f9ecba00fb6fee1e0e6927e58cf832665. 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/QZDQH2501436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e2c5cea2ed2fad5ebf993ff8d09b3633e7d5b64e1b63fbfc1a4de76f8452e. 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/QZDQH2501437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b90ca1eb154be9e848ffbf36b668db2b39dab12c24359625f15e171698f9ed. 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/QZDQH2501438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef82a9069181c1bdfbbdd99f6abf208952e6bb92a08758db7ad8bdde45c23181. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDQH2501439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf421fb090ac7eabddfb6467c124b8169dca81f60861ddcbe33f85f738ffae1e9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZDQH2501440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99b9eb711b0f98ec743cdbd865cbbcc7cda876f3d980e54d92d05accd404930. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDQH2501441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a51bbae6707d7631daa975d2b4b2776bd2e8271c4bcc0151c853cc6cbaca2a2. 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/QZDQH2501442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc036e28968af1f5395d8e11b135fb292da68813072b3d2dffdcb29e6fec5bf5. 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/QZDQH2501444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31e55a171077ea767009075655ac4c68602b4f3c4bfdf75afe66553fdb2e457. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZDQH2501445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51377e7f60730d3a391cac05c0db41b32b3557b7c3b315711e19203afc1d6ea2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:44:58Z), 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/QZDQH2501447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7075ece658968c983aa954e0747fb4b14b814b9e7c698bcfea6d629e460af388. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2501449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4191bab632eb2a3a487c20b9bb91681bd813aa1db961bed31204e7c340cc14c1. 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/QZDQH2501453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa58eadd17386d4b98cc431676feaa328655f53db2bc0ee18bb91f08c9ce65c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBA2463025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b6273e590765247d61f42283a99d5f5c232e0ad45eb56ab3d10343341ee4a9. 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/QZDQH2256030.