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 0x8b432bfbb6357053ff2d719d29bb25a84701ab40abca7aa1f182b5509163f4af. 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/38b6c349-c58b-47b2-8361-eaacc39b7b3a.json and https://artists.proofprofile.net/proofs/artist/38b6c349-c58b-47b2-8361-eaacc39b7b3a.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 0xa009f29ee5aae7743445b8a3c1572be7293cdbd6bc2cc59996f7a1cfc9909645. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZNWV2045662.
Love Is Heroin / Two Misunderstood Souls
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00551d3d8f1b3ae6026c09b807ad3ccebcd4f51d488fc0916a453b21edab651. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA62377816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a23918e805438da00ec560d5c496f6701dbfdd35f418904a32b4d06929d8f. 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/QZDA62377819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4e9d92e1e1d3073b16a3b496e1eb562c3e8b6b5c5cbb12ffa695886fc9646f. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZDA62377820.
Prisoner Of Your Past / Pioneer Of Your Future
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb23477af9bf5fc4adc6f3d322141a8cdb29a35ae8d34d57193f754b1781af6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA62377822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09309cc316cfdd5b2923500138a24b906aa6fc55ddbb2aed942b32f4214e6503. 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/QZDA62377823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48da91a370ea307a5565a08b4a845dfecfef73c4ec2ef96e1a65a2354db4ede8. 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/QZDA62377824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccad6ef64adac275778e6093b2f214d48ddfa3f5f0d0eeaf2b24c3ad3b50a3d. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZDA62377825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76209ee2ca439064563b6e3d5370d1ef608dca700a376c6779988a5b3af763ea. 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/QZK6K2398314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d55a88ad2d5476c270962d8f014f235de7175d5f1dd9a631ab63b01c262721e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBB2386949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4381440431cd2a5140055d1c7fce6ce8218cff9cc796e98e01e28faa32165f. 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/QZTBB2386950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5ca9edf30ca9d8af42dec666c37c1282b4bdf10e04577ed90e7373aa9ac010. 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/QZWFK2370594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211ddb855a1e5664800908be37d5a0330c06a6cc0148d8b7bf1168af5e09f453. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ22429578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa440b5d8bfc295fec34d1101eef63085232e67f8eaaad7cf96446d2462fdf6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA82448183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0807bbc8af9320d0aba23168bf8a5862b8161ab16c8e09f9d8c080d61e4d06. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA82448184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f602171b8be591a7e0a252c29cc3da17ee37327c05c6655a2af7eb840843e55. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZMEN2411383.