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 0xb25df7890bea95b161b51f798972ef038477a5ed1dcb3d77a5a046e6657bb029. 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/b756b99e-719a-442c-88fd-eabd1cfc1727.json and https://artists.proofprofile.net/proofs/artist/b756b99e-719a-442c-88fd-eabd1cfc1727.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 0x850a4e6bdb8707b43ff7cc7af6853fb9abbe63f44230bfceca4b6d0b7043f1c9. 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/QMFME1407657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1d7269bb97d4449e40a558acbc08dea762fa49c2a7755d4a365c412c28c7e1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMFME1407658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf377235b6f6ceae882e54d3d3346ee34d20a323d1ea1e3d102a8994c3c87d11. 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/QMFME1407661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074504dfaac5b21311f3953f22864ce43d961e97335a10a96f06fa0504c471ac. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMFME1407666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7f145a82f1af457e0dc281e2e5c9d959ca2dd807acf8029d6f01baf669eae5. 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/QMFME1407667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea7973172158c4c9e7006ad395ae69d82fafd19b5c54ec9e8279d8251be9d69. 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/QMFME1407668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40132b72cdeff95a5e5b23fcf11ac3c03e4165689525baa6056f8723bbc5fd30. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMFME1407669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d141b28de0052c12be8d462dbdb5750a6406f4a8299904aa8526b0a1616bdf. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QM6N21781920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4fb2f72054d1ac4f05648ed53401d0b05f561df14972ce1e204ef89ac875dc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM6N21781921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2b6d1691e14e21cc565e2404bcc693006a5963077655bf5676ce87049844e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM6N21781923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d6ab44785e079f58677a695ecedae2acc1ba14b790899ded76339ec1b25135. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QM6N21781924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2571089b1df7131a53b5cabb7b475e1d33146438cc1f08849245151d4a515d2. 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/QM6N21781925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc32c5520731c609aa1ad61fcfb051c5266dc6e1ee1ca647456c9efac8262de0. 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/QM6N21781926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d1457caa89787a8f9cb5c52fe5f70040fae91bf7f2aeeb06628e11da298509. 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/QM6N21781929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294907d74eaf05bffceefcbb84418609680e3c22a89ac7e409332ae6abd3d126. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/QM6N21781930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfccac9f2b45369940aa89588320112f1855363f01393cb73221316573da42c. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QM6N21781931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6971ab96550e6a21d12361f011f30b279f3f3a9ee2935ca0a3314fa302bccaf7. 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/QM6N21781933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3aa4b50cb59ce35e4b53c1e3f4f08421690499a97bedbb11c1869bcbc79a8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZB4J1849969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a842c3356d6945b3281473fa9f472be8a8c165cb089f872215dbdd000b9551. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZB4J1849970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d75a09b6334691920fe5177d750b1c34e6644649c6e0b82d9b958b4c5f12ae. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZB4J1849971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f3a185b3984777fa352e5c5a195880959b5ba8b3d62a67285473f69fad661d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZB4J1849973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084ed508eddb0245c2d50b1625f492f872d5bf224f4b786c1ffd29b5ae92b1de. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZB4J1849974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732701c3e8a986d3e6b5eccf3dac7939d7f7b59865e9e565459246dc7539b23. Chain 2 (Bitcoin): anchored in block 957689 (2026-07-12T10:12:33Z), 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/QZB4J1849976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a5db94b1b61dd46593ddc1c69aa93c9043c15ce1112f15466ed2aff5ce57c3. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZB4J1849977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedecf96aa47b1ee7ff40efc92cb6d8698e834e8e1446b1287b0eac24a17879c0. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZB4J1849978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54174f2fa21ee133b8c6cb7b6d25a6f0531d3022f3ad203f3693471409b9eacb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZB4J1849979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e4b34a630edc488f2d154daaec88df77ca70ec467637cb13b00f8ed62692c. 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/GBMJG1815341.