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 0x21ea3b7ce885e0fbb74d6e55934003323389d3f6d83a73a92f881eb58acf1a25. 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/708249b7-e6cf-4f4c-b914-265facfff1cb.json and https://artists.proofprofile.net/proofs/artist/708249b7-e6cf-4f4c-b914-265facfff1cb.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 0xf3ae8389191a9ba607ce3f624608bcc8df4f9fc670cd1c5b520fa22ac616a382. 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/QM4DW1590173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaae4194df1a00049f8d13258e7eb5a586db436a548e91a633fb676b04ea9c0. 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/QM4DW1590177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32930a79bb60ebc4299b0feb61644c70a9c129cfaefc28f72c4e7b67ce64187. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4DW1590179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb379fb972a8d846424bda7272aafd0eb34437a1be5e09e76373355227b3b05. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM4DW1590180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ffe4d3df64cb10beabd6190cffbb9e1242fa42e98a5dfe7a729e20621e5f1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM4DW1590182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef112f720706b7bf9506386d0cd8bd25e56f60a0092a5bcaa0d5d3855369303. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QM4DW1590184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a461f842d5b970159d007658f358293c745addfa1b8f3a0f21701eb645f3dc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QMPKX1630466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6677787f26bebb377874b3e1ad9023adf4f9ff9376ac3c44a4e269a491a814. 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/QZTBA2287654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78140ac574db4382e1a41b1f5b7825c82055d187a9702e354f2a898ccdcad5a6. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZDA82329558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1496bc4f00e2291386cef6e5cecd3c2de9fcb33dfeb5d3faea754ea9d5a6636b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZDA52493964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13781f2ac78e803e01c5a2dc75c5ece3af04094c3ff2a82f29619ba244daf4e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZHN42403811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a935cc56995d3b7a7083a6aa6c5137fd5447ae3d659957bb56162a8acda9b70. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZRP42481142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe272b913397641c7a1be737904f2d01c84089eab7f79b27cc2bb87c4b104c602. 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/QZTAU2533202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08463cfe53fe746a82472e587734a0e7f4f294cbe55bf00db1c642aa8ff2ed22. 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/QZTAU2533203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf458647210e78937045b65b4807d0260baa68945aeda82914feda6cb64d446. 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/QZTAU2533204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2890cd6ea83a10cee0c19f17a961f6626719492d5819d2a95286ce33b628d9ea. 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/QZTAU2533205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58314cbaa56b4d87329a46f70adc542f0df8429ba39248cf23af2cc1176c69c8. 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/QZTAU2533206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6bdd18ce82ca823c3857e18e1c3dbda204223974a11bca970560289152322b. 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/QZTAU2533207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37db4ba036cdc02d41c5fa69e57a3ac87779bf51abffff5c3f181af9f0f887. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAU2533208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f1aed6dd7e93280f6889ab1c9e19cff7acb6cb4e9542980164bf78be45b841. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAU2533209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4092848e6aec667f2ccdf7689cbe399e8b5fd1f71dcb898520963bc37156f1c7. 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/QZTAU2533210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39a6e341211f222414b9223c61a02c70e3b2ffc27ee63406b31ff031dfe92f9. 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/QZZ7N2489078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e95829267b58b7bf66536ec47e73701a76f62b80ab3d959757a07f64f488d. 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/QZTAU2533211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bc8c3516572f0f883090179352b74c51f2fabb4f7a2d26e869b73453aac6b6. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZMEQ2596345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf180a752e105613cd8766c137bbddf6c0dff46562b71f81ccdb8333a0a86dc3. 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/QZTAU2533212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42f03dff086310a1b362af99e3cd4ca24432e552238d6cc0c13febf00729abb. 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/QZTAU2533213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fd949d5d3e45ad6d3f90ff60d2a95f6974fecae9bba53694475fbaed2fec48. 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/QZTAU2533214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e6694b1bfdc96973e4a66c4169e0929e54abd7203213a7f935bb88c6b0898. 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/QT6EB2532546.