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 0x6ab7f71d467ca3e1d0e33d3613a4b8c73f4ff6e9f3c26d969f28daaa5e2ab7aa. 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/f796e7df-ed75-42f0-8d5e-941b039fd316.json and https://artists.proofprofile.net/proofs/artist/f796e7df-ed75-42f0-8d5e-941b039fd316.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 0xaed7417d234fa2ae025fb1d0e12bc7948280f2c81ec18f44d6bdbfc9dee3e7aa. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DGA062029887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54070fc8698b78debed6d81aafcfb6523028efee117959f13ccafa0ca91a77c8. 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/DGA062029888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de765c115eaa3e5728ae761f6f838a6009f8035623bbc9a1ebaf8b6756c8099. 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/DGA062029889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9433b3eb173fc0fdd7937dd15884d0a99d7633895547a13b6ee2c2e9ca5191. 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/DGA062029890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea22a7c53b54c1a6779b965c66a434cb200877336a1a496153f7d6dbe7b135d3. 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/DGA062029891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d544bf34896fe3573d747b82796c38e55db8543f67ca7660c6022b984041b3a. 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/DGA062029892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4b11e3ddad67c4ec4ca74ccd0609c863f0884238b974771d0548e7dd14ecb5. 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/DGA062029893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90515a01f016d749d72f146572c2dab607129ddb4618ba7019a1aa031ad50a49. 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/DGA062029894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c24fdd5ea73f7675a7534a4c77357ff1ecdbf0acf05e00a8cd80f517d171f5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DGA062029895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe58f469eeb397513dd2a083d0a4db35b649e03816392db5956fa394854bb76. 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/DGA062029896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235d355302bb1486ebe3d60c03127d9782f9392504e047c0d2e61683fcf2f0ad. 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/DGA062029897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e3b83584c8781cdfb67c697e4ff0060f0692ab0a6d914f195b7559332a4a77. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA062029898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1eeacf7b64ed3a90ca9edc5ad0e6e2630a653b9e36239a1523979775be4e65. 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/DGA062029899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5428ef48a7207b795f1f02b6dd253dc9d9836504d38b9705a4e6c94136d7582. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA062029900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094525fa9c61a215950dd3a90fb365fa7a24adcff2a7c2ab769f0794a048f0e4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA062029901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3bfd9a0966f572ac2b804b24c2d83bd599dbe04af1d5cfe8a2c4c6c81fb4bf. 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/DGA062029902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4abc0d26430b60c627805d7247eba035961f612eae48bbed38fd024c6003e5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DGA062029903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862d411715792943bd8a44ab13ad706605ddb1f2ca822899ae07f18c9354535c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA062029904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80656f8df59d5d5f0aee2275e897199dba3f012ed78dffa71e4ab2508e412a92. 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/DGA062029906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdc944ed550ea706d87c1ab10b46ab29573ba8d6e4a243bfd1fa62727c6e1e8. 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/DGA062029907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05881ca7b9f482171fd4c2553de372636235eed6a5b280dc444ea9fc164202bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA062029908.